[PATCH 2/9] dma: Convert from tasklet to BH workqueue

Allen Pais
2024-03-27T16:03:22Z

The only generic interface to execute asynchronously in the BH context is
tasklet; however, it's marked deprecated and has some design flaws. To
replace tasklets, BH workqueue support was recently added. A BH workqueue
behaves similarly to regular workqueues except that the queued work items
are executed in the BH context.

This patch converts drivers/dma/* from tasklet to BH workqueue.

Based on the work done by Tejun Heo <tj@kernel.org>
Branch: git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-6.10

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
---
drivers/dma/altera-msgdma.c | 15 ++++----
drivers/dma/apple-admac.c | 15 ++++----
drivers/dma/at_hdmac.c | 2 +-
drivers/dma/at_xdmac.c | 15 ++++----
drivers/dma/bcm2835-dma.c | 2 +-
drivers/dma/dma-axi-dmac.c | 2 +-
drivers/dma/dma-jz4780.c | 2 +-
.../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 2 +-
drivers/dma/dw-edma/dw-edma-core.c | 2 +-
drivers/dma/dw/core.c | 13 +++----
drivers/dma/dw/regs.h | 3 +-
drivers/dma/ep93xx_dma.c | 15 ++++----
drivers/dma/fsl-edma-common.c | 2 +-
drivers/dma/fsl-qdma.c | 2 +-
drivers/dma/fsl_raid.c | 11 +++---
drivers/dma/fsl_raid.h | 2 +-
drivers/dma/fsldma.c | 15 ++++----
drivers/dma/fsldma.h | 3 +-
drivers/dma/hisi_dma.c | 2 +-
drivers/dma/hsu/hsu.c | 2 +-
drivers/dma/idma64.c | 4 +--
drivers/dma/img-mdc-dma.c | 2 +-
drivers/dma/imx-dma.c | 27 +++++++-------
drivers/dma/imx-sdma.c | 6 ++--
drivers/dma/ioat/dma.c | 17 ++++-----
drivers/dma/ioat/dma.h | 5 +--
drivers/dma/ioat/init.c | 2 +-
drivers/dma/k3dma.c | 19 +++++-----
drivers/dma/mediatek/mtk-cqdma.c | 35 ++++++++++---------
drivers/dma/mediatek/mtk-hsdma.c | 2 +-
drivers/dma/mediatek/mtk-uart-apdma.c | 4 +--
drivers/dma/mmp_pdma.c | 13 +++----
drivers/dma/mmp_tdma.c | 11 +++---
drivers/dma/mpc512x_dma.c | 17 ++++-----
drivers/dma/mv_xor.c | 13 +++----
drivers/dma/mv_xor.h | 5 +--
drivers/dma/mv_xor_v2.c | 23 ++++++------
drivers/dma/mxs-dma.c | 13 +++----
drivers/dma/nbpfaxi.c | 15 ++++----
drivers/dma/owl-dma.c | 2 +-
drivers/dma/pch_dma.c | 17 ++++-----
drivers/dma/pl330.c | 31 ++++++++--------
drivers/dma/plx_dma.c | 13 +++----
drivers/dma/ppc4xx/adma.c | 17 ++++-----
drivers/dma/ppc4xx/adma.h | 5 +--
drivers/dma/pxa_dma.c | 2 +-
drivers/dma/qcom/bam_dma.c | 35 ++++++++++---------
drivers/dma/qcom/gpi.c | 18 +++++-----
drivers/dma/qcom/hidma.c | 11 +++---
drivers/dma/qcom/hidma.h | 5 +--
drivers/dma/qcom/hidma_ll.c | 11 +++---
drivers/dma/qcom/qcom_adm.c | 2 +-
drivers/dma/sa11x0-dma.c | 27 +++++++-------
drivers/dma/sf-pdma/sf-pdma.c | 23 ++++++------
drivers/dma/sf-pdma/sf-pdma.h | 5 +--
drivers/dma/sprd-dma.c | 2 +-
drivers/dma/st_fdma.c | 2 +-
drivers/dma/ste_dma40.c | 17 ++++-----
drivers/dma/sun6i-dma.c | 33 ++++++++---------
drivers/dma/tegra186-gpc-dma.c | 2 +-
drivers/dma/tegra20-apb-dma.c | 19 +++++-----
drivers/dma/tegra210-adma.c | 2 +-
drivers/dma/ti/edma.c | 2 +-
drivers/dma/ti/k3-udma.c | 11 +++---
drivers/dma/ti/omap-dma.c | 2 +-
drivers/dma/timb_dma.c | 23 ++++++------
drivers/dma/txx9dmac.c | 29 +++++++--------
drivers/dma/txx9dmac.h | 5 +--
drivers/dma/virt-dma.c | 9 ++---
drivers/dma/virt-dma.h | 9 ++---
drivers/dma/xgene-dma.c | 21 +++++------
drivers/dma/xilinx/xilinx_dma.c | 23 ++++++------
drivers/dma/xilinx/xilinx_dpdma.c | 21 +++++------
drivers/dma/xilinx/zynqmp_dma.c | 21 +++++------
74 files changed, 442 insertions(+), 395 deletions(-)

diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c
index a8e3615235b8..611b5290324b 100644
--- a/drivers/dma/altera-msgdma.c
+++ b/drivers/dma/altera-msgdma.c
@@ -20,6 +20,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of_dma.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -170,7 +171,7 @@ struct msgdma_sw_desc {
struct msgdma_device {
spinlock_t lock;
struct device *dev;
- struct tasklet_struct irq_tasklet;
+ struct work_struct irq_work;
struct list_head pending_list;
struct list_head free_list;
struct list_head active_list;
@@ -676,12 +677,12 @@ static int msgdma_alloc_chan_resources(struct dma_chan *dchan)
}

/**
- * msgdma_tasklet - Schedule completion tasklet
+ * msgdma_work - Schedule completion work
* @t: Pointer to the Altera sSGDMA channel structure
*/
-static void msgdma_tasklet(struct tasklet_struct *t)
+static void msgdma_work(struct work_struct *t)
{
- struct msgdma_device *mdev = from_tasklet(mdev, t, irq_tasklet);
+ struct msgdma_device *mdev = from_work(mdev, t, irq_work);
u32 count;
u32 __maybe_unused size;
u32 __maybe_unused status;
@@ -740,7 +741,7 @@ static irqreturn_t msgdma_irq_handler(int irq, void *data)
spin_unlock(&mdev->lock);
}

- tasklet_schedule(&mdev->irq_tasklet);
+ queue_work(system_bh_wq, &mdev->irq_work);

/* Clear interrupt in mSGDMA controller */
iowrite32(MSGDMA_CSR_STAT_IRQ, mdev->csr + MSGDMA_CSR_STATUS);
@@ -758,7 +759,7 @@ static void msgdma_dev_remove(struct msgdma_device *mdev)
return;

devm_free_irq(mdev->dev, mdev->irq, mdev);
- tasklet_kill(&mdev->irq_tasklet);
+ cancel_work_sync(&mdev->irq_work);
list_del(&mdev->dmachan.device_node);
}

@@ -844,7 +845,7 @@ static int msgdma_probe(struct platform_device *pdev)
if (ret)
return ret;

- tasklet_setup(&mdev->irq_tasklet, msgdma_tasklet);
+ INIT_WORK(&mdev->irq_work, msgdma_work);

dma_cookie_init(&mdev->dmachan);

diff --git a/drivers/dma/apple-admac.c b/drivers/dma/apple-admac.c
index 9588773dd2eb..7cdb4b6b5f81 100644
--- a/drivers/dma/apple-admac.c
+++ b/drivers/dma/apple-admac.c
@@ -16,6 +16,7 @@
#include <linux/reset.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -89,7 +90,7 @@ struct admac_chan {
unsigned int no;
struct admac_data *host;
struct dma_chan chan;
- struct tasklet_struct tasklet;
+ struct work_struct work;

u32 carveout;

@@ -520,7 +521,7 @@ static int admac_terminate_all(struct dma_chan *chan)
adchan->current_tx = NULL;
}
/*
- * Descriptors can only be freed after the tasklet
+ * Descriptors can only be freed after the work
* has been killed (in admac_synchronize).
*/
list_splice_tail_init(&adchan->submitted, &adchan->to_free);
@@ -541,7 +542,7 @@ static void admac_synchronize(struct dma_chan *chan)
list_splice_tail_init(&adchan->to_free, &head);
spin_unlock_irqrestore(&adchan->lock, flags);

- tasklet_kill(&adchan->tasklet);
+ cancel_work_sync(&adchan->work);

list_for_each_entry_safe(adtx, _adtx, &head, node) {
list_del(&adtx->node);
@@ -660,7 +661,7 @@ static void admac_handle_status_desc_done(struct admac_data *ad, int channo)
tx->reclaimed_pos %= 2 * tx->buf_len;

admac_cyclic_write_desc(ad, channo, tx);
- tasklet_schedule(&adchan->tasklet);
+ queue_work(system_bh_wq, &adchan->work);
}
spin_unlock_irqrestore(&adchan->lock, flags);
}
@@ -710,9 +711,9 @@ static irqreturn_t admac_interrupt(int irq, void *devid)
return IRQ_HANDLED;
}

-static void admac_chan_tasklet(struct tasklet_struct *t)
+static void admac_chan_work(struct work_struct *t)
{
- struct admac_chan *adchan = from_tasklet(adchan, t, tasklet);
+ struct admac_chan *adchan = from_work(adchan, t, work);
struct admac_tx *adtx;
struct dmaengine_desc_callback cb;
struct dmaengine_result tx_result;
@@ -884,7 +885,7 @@ static int admac_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&adchan->issued);
INIT_LIST_HEAD(&adchan->to_free);
list_add_tail(&adchan->chan.device_node, &dma->channels);
- tasklet_setup(&adchan->tasklet, admac_chan_tasklet);
+ INIT_WORK(&adchan->work, admac_chan_work);
}

err = reset_control_reset(ad->rstc);
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 40052d1bd0b5..335816473a61 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -272,7 +272,7 @@ enum atc_status {
* @per_if: peripheral interface
* @mem_if: memory interface
* @status: transmit status information from irq/prep* functions
- * to tasklet (use atomic operations)
+ * to work (use atomic operations)
* @save_cfg: configuration register that is saved on suspend/resume cycle
* @save_dscr: for cyclic operations, preserve next descriptor address in
* the cyclic list on suspend/resume cycle
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 299396121e6d..a73eab2881f9 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -22,6 +22,7 @@
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -228,7 +229,7 @@ struct at_xdmac_chan {
u32 save_cndc;
u32 irq_status;
unsigned long status;
- struct tasklet_struct tasklet;
+ struct work_struct work;
struct dma_slave_config sconfig;

spinlock_t lock;
@@ -1762,9 +1763,9 @@ static void at_xdmac_handle_error(struct at_xdmac_chan *atchan)
/* Then continue with usual descriptor management */
}

-static void at_xdmac_tasklet(struct tasklet_struct *t)
+static void at_xdmac_work(struct work_struct *t)
{
- struct at_xdmac_chan *atchan = from_tasklet(atchan, t, tasklet);
+ struct at_xdmac_chan *atchan = from_work(atchan, t, work);
struct at_xdmac *atxdmac = to_at_xdmac(atchan->chan.device);
struct at_xdmac_desc *desc;
struct dma_async_tx_descriptor *txd;
@@ -1869,7 +1870,7 @@ static irqreturn_t at_xdmac_interrupt(int irq, void *dev_id)
if (atchan->irq_status & (AT_XDMAC_CIS_RBEIS | AT_XDMAC_CIS_WBEIS))
at_xdmac_write(atxdmac, AT_XDMAC_GD, atchan->mask);

- tasklet_schedule(&atchan->tasklet);
+ queue_work(system_bh_wq, &atchan->work);
ret = IRQ_HANDLED;
}

@@ -2307,7 +2308,7 @@ static int at_xdmac_probe(struct platform_device *pdev)
return PTR_ERR(atxdmac->clk);
}

- /* Do not use dev res to prevent races with tasklet */
+ /* Do not use dev res to prevent races with work */
ret = request_irq(atxdmac->irq, at_xdmac_interrupt, 0, "at_xdmac", atxdmac);
if (ret) {
dev_err(&pdev->dev, "can't request irq\n");
@@ -2387,7 +2388,7 @@ static int at_xdmac_probe(struct platform_device *pdev)
spin_lock_init(&atchan->lock);
INIT_LIST_HEAD(&atchan->xfers_list);
INIT_LIST_HEAD(&atchan->free_descs_list);
- tasklet_setup(&atchan->tasklet, at_xdmac_tasklet);
+ INIT_WORK(&atchan->work, at_xdmac_work);

/* Clear pending interrupts. */
while (at_xdmac_chan_read(atchan, AT_XDMAC_CIS))
@@ -2449,7 +2450,7 @@ static void at_xdmac_remove(struct platform_device *pdev)
for (i = 0; i < atxdmac->dma.chancnt; i++) {
struct at_xdmac_chan *atchan = &atxdmac->chan[i];

- tasklet_kill(&atchan->tasklet);
+ cancel_work_sync(&atchan->work);
at_xdmac_free_chan_resources(&atchan->chan);
}
}
diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
index 9d74fe97452e..079d04986b73 100644
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -846,7 +846,7 @@ static void bcm2835_dma_free(struct bcm2835_dmadev *od)
list_for_each_entry_safe(c, next, &od->ddev.channels,
vc.chan.device_node) {
list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.work);
}

dma_unmap_page_attrs(od->ddev.dev, od->zero_page, PAGE_SIZE,
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index 4e339c04fc1e..95df109d3161 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -1136,7 +1136,7 @@ static void axi_dmac_remove(struct platform_device *pdev)

of_dma_controller_free(pdev->dev.of_node);
free_irq(dmac->irq, dmac);
- tasklet_kill(&dmac->chan.vchan.task);
+ cancel_work_sync(&dmac->chan.vchan.work);
dma_async_device_unregister(&dmac->dma_dev);
clk_disable_unprepare(dmac->clk);
}
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index c9cfa341db51..d8ce91369176 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -1019,7 +1019,7 @@ static void jz4780_dma_remove(struct platform_device *pdev)
free_irq(jzdma->irq, jzdma);

for (i = 0; i < jzdma->soc_data->nb_channels; i++)
- tasklet_kill(&jzdma->chan[i].vchan.task);
+ cancel_work_sync(&jzdma->chan[i].vchan.work);
}

static const struct jz4780_dma_soc_data jz4740_dma_soc_data = {
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index a86a81ff0caa..1c3c58496885 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -1636,7 +1636,7 @@ static void dw_remove(struct platform_device *pdev)
list_for_each_entry_safe(chan, _chan, &dw->dma.channels,
vc.chan.device_node) {
list_del(&chan->vc.chan.device_node);
- tasklet_kill(&chan->vc.task);
+ cancel_work_sync(&chan->vc.work);
}
}

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 68236247059d..34e9d2dcc00b 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -1003,7 +1003,7 @@ int dw_edma_remove(struct dw_edma_chip *chip)
dma_async_device_unregister(&dw->dma);
list_for_each_entry_safe(chan, _chan, &dw->dma.channels,
vc.chan.device_node) {
- tasklet_kill(&chan->vc.task);
+ cancel_work_sync(&chan->vc.work);
list_del(&chan->vc.chan.device_node);
}

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 5f7d690e3dba..0e13750e9a19 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>

#include "../dmaengine.h"
#include "internal.h"
@@ -181,7 +182,7 @@ static void dwc_dostart(struct dw_dma_chan *dwc, struct dw_desc *first)
__func__);
dwc_dump_chan_regs(dwc);

- /* The tasklet will hopefully advance the queue... */
+ /* The work will hopefully advance the queue... */
return;
}

@@ -460,9 +461,9 @@ static void dwc_handle_error(struct dw_dma *dw, struct dw_dma_chan *dwc)
dwc_descriptor_complete(dwc, bad_desc, true);
}

-static void dw_dma_tasklet(struct tasklet_struct *t)
+static void dw_dma_work(struct work_struct *t)
{
- struct dw_dma *dw = from_tasklet(dw, t, tasklet);
+ struct dw_dma *dw = from_work(dw, t, work);
struct dw_dma_chan *dwc;
u32 status_xfer;
u32 status_err;
@@ -526,7 +527,7 @@ static irqreturn_t dw_dma_interrupt(int irq, void *dev_id)
channel_clear_bit(dw, MASK.ERROR, (1 << 8) - 1);
}

- tasklet_schedule(&dw->tasklet);
+ queue_work(system_bh_wq, &dw->work);

return IRQ_HANDLED;
}
@@ -1138,7 +1139,7 @@ int do_dma_probe(struct dw_dma_chip *chip)
goto err_pdata;
}

- tasklet_setup(&dw->tasklet, dw_dma_tasklet);
+ INIT_WORK(&dw->work, dw_dma_work);

err = request_irq(chip->irq, dw_dma_interrupt, IRQF_SHARED,
dw->name, dw);
@@ -1283,7 +1284,7 @@ int do_dma_remove(struct dw_dma_chip *chip)
dma_async_device_unregister(&dw->dma);

free_irq(chip->irq, dw);
- tasklet_kill(&dw->tasklet);
+ cancel_work_sync(&dw->work);

list_for_each_entry_safe(dwc, _dwc, &dw->dma.channels,
chan.device_node) {
diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index 76654bd13c1a..332a4eba5e9f 100644
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -12,6 +12,7 @@
#include <linux/dmaengine.h>

#include <linux/io-64-nonatomic-hi-lo.h>
+#include <linux/workqueue.h>

#include "internal.h"

@@ -315,7 +316,7 @@ struct dw_dma {
char name[20];
void __iomem *regs;
struct dma_pool *desc_pool;
- struct tasklet_struct tasklet;
+ struct work_struct work;

/* channels */
struct dw_dma_chan *chan;
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index d6c60635e90d..acd9bde36e1b 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>

#include <linux/platform_data/dma-ep93xx.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -136,7 +137,7 @@ struct ep93xx_dma_desc {
* @regs: memory mapped registers
* @irq: interrupt number of the channel
* @clk: clock used by this channel
- * @tasklet: channel specific tasklet used for callbacks
+ * @work: channel specific work used for callbacks
* @lock: lock protecting the fields following
* @flags: flags for the channel
* @buffer: which buffer to use next (0/1)
@@ -167,7 +168,7 @@ struct ep93xx_dma_chan {
void __iomem *regs;
int irq;
struct clk *clk;
- struct tasklet_struct tasklet;
+ struct work_struct work;
/* protects the fields following */
spinlock_t lock;
unsigned long flags;
@@ -745,9 +746,9 @@ static void ep93xx_dma_advance_work(struct ep93xx_dma_chan *edmac)
spin_unlock_irqrestore(&edmac->lock, flags);
}

-static void ep93xx_dma_tasklet(struct tasklet_struct *t)
+static void ep93xx_dma_work(struct work_struct *t)
{
- struct ep93xx_dma_chan *edmac = from_tasklet(edmac, t, tasklet);
+ struct ep93xx_dma_chan *edmac = from_work(edmac, t, work);
struct ep93xx_dma_desc *desc, *d;
struct dmaengine_desc_callback cb;
LIST_HEAD(list);
@@ -802,12 +803,12 @@ static irqreturn_t ep93xx_dma_interrupt(int irq, void *dev_id)
switch (edmac->edma->hw_interrupt(edmac)) {
case INTERRUPT_DONE:
desc->complete = true;
- tasklet_schedule(&edmac->tasklet);
+ queue_work(system_bh_wq, &edmac->work);
break;

case INTERRUPT_NEXT_BUFFER:
if (test_bit(EP93XX_DMA_IS_CYCLIC, &edmac->flags))
- tasklet_schedule(&edmac->tasklet);
+ queue_work(system_bh_wq, &edmac->work);
break;

default:
@@ -1351,7 +1352,7 @@ static int __init ep93xx_dma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&edmac->active);
INIT_LIST_HEAD(&edmac->queue);
INIT_LIST_HEAD(&edmac->free_list);
- tasklet_setup(&edmac->tasklet, ep93xx_dma_tasklet);
+ INIT_WORK(&edmac->work, ep93xx_dma_work);

list_add_tail(&edmac->chan.device_node,
&dma_dev->channels);
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index b18faa7cfedb..5f568ca11b67 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -847,7 +847,7 @@ void fsl_edma_cleanup_vchan(struct dma_device *dmadev)
list_for_each_entry_safe(chan, _chan,
&dmadev->channels, vchan.chan.device_node) {
list_del(&chan->vchan.chan.device_node);
- tasklet_kill(&chan->vchan.task);
+ cancel_work_sync(&chan->vchan.work);
}
}

diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c
index 5005e138fc23..e5bceec1a396 100644
--- a/drivers/dma/fsl-qdma.c
+++ b/drivers/dma/fsl-qdma.c
@@ -1261,7 +1261,7 @@ static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
list_for_each_entry_safe(chan, _chan,
&dmadev->channels, vchan.chan.device_node) {
list_del(&chan->vchan.chan.device_node);
- tasklet_kill(&chan->vchan.task);
+ cancel_work_sync(&chan->vchan.task);
}
}

diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
index 014ff523d5ec..72c495e20f52 100644
--- a/drivers/dma/fsl_raid.c
+++ b/drivers/dma/fsl_raid.c
@@ -70,6 +70,7 @@
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"
#include "fsl_raid.h"
@@ -155,9 +156,9 @@ static void fsl_re_cleanup_descs(struct fsl_re_chan *re_chan)
fsl_re_issue_pending(&re_chan->chan);
}

-static void fsl_re_dequeue(struct tasklet_struct *t)
+static void fsl_re_dequeue(struct work_struct *t)
{
- struct fsl_re_chan *re_chan = from_tasklet(re_chan, t, irqtask);
+ struct fsl_re_chan *re_chan = from_work(re_chan, t, irqtask);
struct fsl_re_desc *desc, *_desc;
struct fsl_re_hw_desc *hwdesc;
unsigned long flags;
@@ -224,7 +225,7 @@ static irqreturn_t fsl_re_isr(int irq, void *data)
/* Clear interrupt */
out_be32(&re_chan->jrregs->jr_interrupt_status, FSL_RE_CLR_INTR);

- tasklet_schedule(&re_chan->irqtask);
+ queue_work(system_bh_wq, &re_chan->irqtask);

return IRQ_HANDLED;
}
@@ -670,7 +671,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
snprintf(chan->name, sizeof(chan->name), "re_jr%02d", q);

chandev = &chan_ofdev->dev;
- tasklet_setup(&chan->irqtask, fsl_re_dequeue);
+ INIT_WORK(&chan->irqtask, fsl_re_dequeue);

ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chandev);
if (ret) {
@@ -848,7 +849,7 @@ static int fsl_re_probe(struct platform_device *ofdev)

static void fsl_re_remove_chan(struct fsl_re_chan *chan)
{
- tasklet_kill(&chan->irqtask);
+ cancel_work_sync(&chan->irqtask);

dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
chan->inb_phys_addr);
diff --git a/drivers/dma/fsl_raid.h b/drivers/dma/fsl_raid.h
index 69d743c04973..d4dfbb7c9984 100644
--- a/drivers/dma/fsl_raid.h
+++ b/drivers/dma/fsl_raid.h
@@ -275,7 +275,7 @@ struct fsl_re_chan {
struct dma_chan chan;
struct fsl_re_chan_cfg *jrregs;
int irq;
- struct tasklet_struct irqtask;
+ struct work_struct irqtask;
u32 alloc_count;

/* hw descriptor ring for inbound queue*/
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 18a6c4bf6275..9f9af6869f2e 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -33,6 +33,7 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/fsldma.h>
+#include <linux/workqueue.h>
#include "dmaengine.h"
#include "fsldma.h"

@@ -968,20 +969,20 @@ static irqreturn_t fsldma_chan_irq(int irq, void *data)
chan_err(chan, "irq: unhandled sr 0x%08x\n", stat);

/*
- * Schedule the tasklet to handle all cleanup of the current
+ * Schedule the work to handle all cleanup of the current
* transaction. It will start a new transaction if there is
* one pending.
*/
- tasklet_schedule(&chan->tasklet);
+ queue_work(system_bh_wq, &chan->work);
chan_dbg(chan, "irq: Exit\n");
return IRQ_HANDLED;
}

-static void dma_do_tasklet(struct tasklet_struct *t)
+static void dma_do_work(struct work_struct *t)
{
- struct fsldma_chan *chan = from_tasklet(chan, t, tasklet);
+ struct fsldma_chan *chan = from_work(chan, t, work);

- chan_dbg(chan, "tasklet entry\n");
+ chan_dbg(chan, "work entry\n");

spin_lock(&chan->desc_lock);

@@ -993,7 +994,7 @@ static void dma_do_tasklet(struct tasklet_struct *t)

spin_unlock(&chan->desc_lock);

- chan_dbg(chan, "tasklet exit\n");
+ chan_dbg(chan, "work exit\n");
}

static irqreturn_t fsldma_ctrl_irq(int irq, void *data)
@@ -1152,7 +1153,7 @@ static int fsl_dma_chan_probe(struct fsldma_device *fdev,
}

fdev->chan[chan->id] = chan;
- tasklet_setup(&chan->tasklet, dma_do_tasklet);
+ INIT_WORK(&chan->work, dma_do_work);
snprintf(chan->name, sizeof(chan->name), "chan%d", chan->id);

/* Initialize the channel */
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index 308bed0a560a..c165091e5c6a 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -12,6 +12,7 @@
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/dmaengine.h>
+#include <linux/workqueue.h>

/* Define data structures needed by Freescale
* MPC8540 and MPC8349 DMA controller.
@@ -172,7 +173,7 @@ struct fsldma_chan {
struct device *dev; /* Channel device */
int irq; /* Channel IRQ */
int id; /* Raw id of this channel */
- struct tasklet_struct tasklet;
+ struct work_struct work;
u32 feature;
bool idle; /* DMA controller is idle */
#ifdef CONFIG_PM
diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
index 4c47bff81064..5bf7d8b3e959 100644
--- a/drivers/dma/hisi_dma.c
+++ b/drivers/dma/hisi_dma.c
@@ -720,7 +720,7 @@ static void hisi_dma_disable_qps(struct hisi_dma_dev *hdma_dev)

for (i = 0; i < hdma_dev->chan_num; i++) {
hisi_dma_disable_qp(hdma_dev, i);
- tasklet_kill(&hdma_dev->chan[i].vc.task);
+ cancel_work_sync(&hdma_dev->chan[i].vc.work);
}
}

diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c
index af5a2e252c25..4ea3f18a20ac 100644
--- a/drivers/dma/hsu/hsu.c
+++ b/drivers/dma/hsu/hsu.c
@@ -500,7 +500,7 @@ int hsu_dma_remove(struct hsu_dma_chip *chip)
for (i = 0; i < hsu->nr_channels; i++) {
struct hsu_dma_chan *hsuc = &hsu->chan[i];

- tasklet_kill(&hsuc->vchan.task);
+ cancel_work_sync(&hsuc->vchan.work);
}

return 0;
diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
index 78a938969d7d..7715be6457e8 100644
--- a/drivers/dma/idma64.c
+++ b/drivers/dma/idma64.c
@@ -613,14 +613,14 @@ static void idma64_remove(struct idma64_chip *chip)

/*
* Explicitly call devm_request_irq() to avoid the side effects with
- * the scheduled tasklets.
+ * the scheduled works.
*/
devm_free_irq(chip->dev, chip->irq, idma64);

for (i = 0; i < idma64->dma.chancnt; i++) {
struct idma64_chan *idma64c = &idma64->chan[i];

- tasklet_kill(&idma64c->vchan.task);
+ cancel_work_sync(&idma64c->vchan.work);
}
}

diff --git a/drivers/dma/img-mdc-dma.c b/drivers/dma/img-mdc-dma.c
index 0532dd2640dc..71245f1b7e28 100644
--- a/drivers/dma/img-mdc-dma.c
+++ b/drivers/dma/img-mdc-dma.c
@@ -1031,7 +1031,7 @@ static void mdc_dma_remove(struct platform_device *pdev)

devm_free_irq(&pdev->dev, mchan->irq, mchan);

- tasklet_kill(&mchan->vc.task);
+ cancel_work_sync(&mchan->vc.work);
}

pm_runtime_disable(&pdev->dev);
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index ebf7c115d553..1c2baa81c6a7 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -26,6 +26,7 @@

#include <asm/irq.h>
#include <linux/dma/imx-dma.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"
#define IMXDMA_MAX_CHAN_DESCRIPTORS 16
@@ -144,7 +145,7 @@ struct imxdma_channel {
struct imxdma_engine *imxdma;
unsigned int channel;

- struct tasklet_struct dma_tasklet;
+ struct work_struct dma_work;
struct list_head ld_free;
struct list_head ld_queue;
struct list_head ld_active;
@@ -345,8 +346,8 @@ static void imxdma_watchdog(struct timer_list *t)

imx_dmav1_writel(imxdma, 0, DMA_CCR(channel));

- /* Tasklet watchdog error handler */
- tasklet_schedule(&imxdmac->dma_tasklet);
+ /* Work watchdog error handler */
+ queue_work(system_bh_wq, &imxdmac->dma_work);
dev_dbg(imxdma->dev, "channel %d: watchdog timeout!\n",
imxdmac->channel);
}
@@ -391,8 +392,8 @@ static irqreturn_t imxdma_err_handler(int irq, void *dev_id)
imx_dmav1_writel(imxdma, 1 << i, DMA_DBOSR);
errcode |= IMX_DMA_ERR_BUFFER;
}
- /* Tasklet error handler */
- tasklet_schedule(&imxdma->channel[i].dma_tasklet);
+ /* Work error handler */
+ queue_work(system_bh_wq, &imxdma->channel[i].dma_work);

dev_warn(imxdma->dev,
"DMA timeout on channel %d -%s%s%s%s\n", i,
@@ -449,8 +450,8 @@ static void dma_irq_handle_channel(struct imxdma_channel *imxdmac)
imx_dmav1_writel(imxdma, tmp, DMA_CCR(chno));

if (imxdma_chan_is_doing_cyclic(imxdmac))
- /* Tasklet progression */
- tasklet_schedule(&imxdmac->dma_tasklet);
+ /* Work progression */
+ queue_work(system_bh_wq, &imxdmac->dma_work);

return;
}
@@ -463,8 +464,8 @@ static void dma_irq_handle_channel(struct imxdma_channel *imxdmac)

out:
imx_dmav1_writel(imxdma, 0, DMA_CCR(chno));
- /* Tasklet irq */
- tasklet_schedule(&imxdmac->dma_tasklet);
+ /* Work irq */
+ queue_work(system_bh_wq, &imxdmac->dma_work);
}

static irqreturn_t dma_irq_handler(int irq, void *dev_id)
@@ -593,9 +594,9 @@ static int imxdma_xfer_desc(struct imxdma_desc *d)
return 0;
}

-static void imxdma_tasklet(struct tasklet_struct *t)
+static void imxdma_work(struct work_struct *t)
{
- struct imxdma_channel *imxdmac = from_tasklet(imxdmac, t, dma_tasklet);
+ struct imxdma_channel *imxdmac = from_work(imxdmac, t, dma_work);
struct imxdma_engine *imxdma = imxdmac->imxdma;
struct imxdma_desc *desc, *next_desc;
unsigned long flags;
@@ -1143,7 +1144,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&imxdmac->ld_free);
INIT_LIST_HEAD(&imxdmac->ld_active);

- tasklet_setup(&imxdmac->dma_tasklet, imxdma_tasklet);
+ INIT_WORK(&imxdmac->dma_work, imxdma_work);
imxdmac->chan.device = &imxdma->dma_device;
dma_cookie_init(&imxdmac->chan);
imxdmac->channel = i;
@@ -1212,7 +1213,7 @@ static void imxdma_free_irq(struct platform_device *pdev, struct imxdma_engine *
if (!is_imx1_dma(imxdma))
disable_irq(imxdmac->irq);

- tasklet_kill(&imxdmac->dma_tasklet);
+ cancel_work_sync(&imxdmac->dma_work);
}
}

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 9b42f5e96b1e..853f7e80bb76 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -881,7 +881,7 @@ static void sdma_update_channel_loop(struct sdma_channel *sdmac)
/*
* The callback is called from the interrupt context in order
* to reduce latency and to avoid the risk of altering the
- * SDMA transaction status by the time the client tasklet is
+ * SDMA transaction status by the time the client work is
* executed.
*/
spin_unlock(&sdmac->vc.lock);
@@ -2364,11 +2364,11 @@ static void sdma_remove(struct platform_device *pdev)
kfree(sdma->script_addrs);
clk_unprepare(sdma->clk_ahb);
clk_unprepare(sdma->clk_ipg);
- /* Kill the tasklet */
+ /* cancel work */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct sdma_channel *sdmac = &sdma->channel[i];

- tasklet_kill(&sdmac->vc.task);
+ cancel_work_sync(&sdmac->vc.work);
sdma_free_chan_resources(&sdmac->vc.chan);
}

diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index 79d8957f9e60..16087e2cc4ae 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -20,6 +20,7 @@
#include <linux/workqueue.h>
#include <linux/prefetch.h>
#include <linux/sizes.h>
+#include <linux/workqueue.h>
#include "dma.h"
#include "registers.h"
#include "hw.h"
@@ -110,7 +111,7 @@ irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
for_each_set_bit(bit, &attnstatus, BITS_PER_LONG) {
ioat_chan = ioat_chan_by_index(instance, bit);
if (test_bit(IOAT_RUN, &ioat_chan->state))
- tasklet_schedule(&ioat_chan->cleanup_task);
+ queue_work(system_bh_wq, &ioat_chan->cleanup_task);
}

writeb(intrctrl, instance->reg_base + IOAT_INTRCTRL_OFFSET);
@@ -127,7 +128,7 @@ irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
struct ioatdma_chan *ioat_chan = data;

if (test_bit(IOAT_RUN, &ioat_chan->state))
- tasklet_schedule(&ioat_chan->cleanup_task);
+ queue_work(system_bh_wq, &ioat_chan->cleanup_task);

return IRQ_HANDLED;
}
@@ -139,8 +140,8 @@ void ioat_stop(struct ioatdma_chan *ioat_chan)
int chan_id = chan_num(ioat_chan);
struct msix_entry *msix;

- /* 1/ stop irq from firing tasklets
- * 2/ stop the tasklet from re-arming irqs
+ /* 1/ stop irq from firing works
+ * 2/ stop the work from re-arming irqs
*/
clear_bit(IOAT_RUN, &ioat_chan->state);

@@ -161,8 +162,8 @@ void ioat_stop(struct ioatdma_chan *ioat_chan)
/* flush inflight timers */
del_timer_sync(&ioat_chan->timer);

- /* flush inflight tasklet runs */
- tasklet_kill(&ioat_chan->cleanup_task);
+ /* flush inflight work runs */
+ cancel_work_sync(&ioat_chan->cleanup_task);

/* final cleanup now that everything is quiesced and can't re-arm */
ioat_cleanup_event(&ioat_chan->cleanup_task);
@@ -690,9 +691,9 @@ static void ioat_cleanup(struct ioatdma_chan *ioat_chan)
spin_unlock_bh(&ioat_chan->cleanup_lock);
}

-void ioat_cleanup_event(struct tasklet_struct *t)
+void ioat_cleanup_event(struct work_struct *t)
{
- struct ioatdma_chan *ioat_chan = from_tasklet(ioat_chan, t, cleanup_task);
+ struct ioatdma_chan *ioat_chan = from_work(ioat_chan, t, cleanup_task);

ioat_cleanup(ioat_chan);
if (!test_bit(IOAT_RUN, &ioat_chan->state))
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index a180171087a8..d5629df04d7d 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -12,6 +12,7 @@
#include <linux/pci_ids.h>
#include <linux/circ_buf.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>
#include "registers.h"
#include "hw.h"

@@ -109,7 +110,7 @@ struct ioatdma_chan {
struct ioatdma_device *ioat_dma;
dma_addr_t completion_dma;
u64 *completion;
- struct tasklet_struct cleanup_task;
+ struct work_struct cleanup_task;
struct kobject kobj;

/* ioat v2 / v3 channel attributes
@@ -392,7 +393,7 @@ int ioat_reset_hw(struct ioatdma_chan *ioat_chan);
enum dma_status
ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
struct dma_tx_state *txstate);
-void ioat_cleanup_event(struct tasklet_struct *t);
+void ioat_cleanup_event(struct work_struct *t);
void ioat_timer_event(struct timer_list *t);
int ioat_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs);
void ioat_issue_pending(struct dma_chan *chan);
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 9c364e92cb82..7b86ec4d0fa4 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -776,7 +776,7 @@ ioat_init_channel(struct ioatdma_device *ioat_dma,
list_add_tail(&ioat_chan->dma_chan.device_node, &dma->channels);
ioat_dma->idx[idx] = ioat_chan;
timer_setup(&ioat_chan->timer, ioat_timer_event, 0);
- tasklet_setup(&ioat_chan->cleanup_task, ioat_cleanup_event);
+ INIT_WORK(&ioat_chan->cleanup_task, ioat_cleanup_event);
}

#define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index 5de8c21d41e7..d852135e8544 100644
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -18,6 +18,7 @@
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/of_dma.h>
+#include <linux/workqueue.h>

#include "virt-dma.h"

@@ -98,7 +99,7 @@ struct k3_dma_phy {
struct k3_dma_dev {
struct dma_device slave;
void __iomem *base;
- struct tasklet_struct task;
+ struct work_struct work;
spinlock_t lock;
struct list_head chan_pending;
struct k3_dma_phy *phy;
@@ -252,7 +253,7 @@ static irqreturn_t k3_dma_int_handler(int irq, void *dev_id)
writel_relaxed(err2, d->base + INT_ERR2_RAW);

if (irq_chan)
- tasklet_schedule(&d->task);
+ queue_work(system_bh_wq, &d->work);

if (irq_chan || err1 || err2)
return IRQ_HANDLED;
@@ -295,9 +296,9 @@ static int k3_dma_start_txd(struct k3_dma_chan *c)
return -EAGAIN;
}

-static void k3_dma_tasklet(struct tasklet_struct *t)
+static void k3_dma_work(struct work_struct *t)
{
- struct k3_dma_dev *d = from_tasklet(d, t, task);
+ struct k3_dma_dev *d = from_work(d, t, work);
struct k3_dma_phy *p;
struct k3_dma_chan *c, *cn;
unsigned pch, pch_alloc = 0;
@@ -432,8 +433,8 @@ static void k3_dma_issue_pending(struct dma_chan *chan)
if (list_empty(&c->node)) {
/* if new channel, add chan_pending */
list_add_tail(&c->node, &d->chan_pending);
- /* check in tasklet */
- tasklet_schedule(&d->task);
+ /* check in work */
+ queue_work(system_bh_wq, &d->work);
dev_dbg(d->slave.dev, "vchan %p: issued\n", &c->vc);
}
}
@@ -956,7 +957,7 @@ static int k3_dma_probe(struct platform_device *op)

spin_lock_init(&d->lock);
INIT_LIST_HEAD(&d->chan_pending);
- tasklet_setup(&d->task, k3_dma_tasklet);
+ INIT_WORK(&d->work, k3_dma_work);
platform_set_drvdata(op, d);
dev_info(&op->dev, "initialized\n");

@@ -981,9 +982,9 @@ static void k3_dma_remove(struct platform_device *op)

list_for_each_entry_safe(c, cn, &d->slave.channels, vc.chan.device_node) {
list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.work);
}
- tasklet_kill(&d->task);
+ cancel_work_sync(&d->work);
clk_disable_unprepare(d->clk);
}

diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c
index 529100c5b9f5..cac4e9f2b07b 100644
--- a/drivers/dma/mediatek/mtk-cqdma.c
+++ b/drivers/dma/mediatek/mtk-cqdma.c
@@ -23,6 +23,7 @@
#include <linux/pm_runtime.h>
#include <linux/refcount.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>

#include "../virt-dma.h"

@@ -94,7 +95,7 @@ struct mtk_cqdma_vdesc {
* @base: The mapped register I/O base of this PC
* @irq: The IRQ that this PC are using
* @refcnt: Track how many VCs are using this PC
- * @tasklet: Tasklet for this PC
+ * @work: Work for this PC
* @lock: Lock protect agaisting multiple VCs access PC
*/
struct mtk_cqdma_pchan {
@@ -104,7 +105,7 @@ struct mtk_cqdma_pchan {

refcount_t refcnt;

- struct tasklet_struct tasklet;
+ struct work_struct work;

/* lock to protect PC */
spinlock_t lock;
@@ -355,9 +356,9 @@ static struct mtk_cqdma_vdesc
return ret;
}

-static void mtk_cqdma_tasklet_cb(struct tasklet_struct *t)
+static void mtk_cqdma_work_cb(struct work_struct *t)
{
- struct mtk_cqdma_pchan *pc = from_tasklet(pc, t, tasklet);
+ struct mtk_cqdma_pchan *pc = from_work(pc, t, work);
struct mtk_cqdma_vdesc *cvd = NULL;
unsigned long flags;

@@ -378,7 +379,7 @@ static void mtk_cqdma_tasklet_cb(struct tasklet_struct *t)
kfree(cvd);
}

- /* re-enable interrupt before leaving tasklet */
+ /* re-enable interrupt before leaving work */
enable_irq(pc->irq);
}

@@ -386,11 +387,11 @@ static irqreturn_t mtk_cqdma_irq(int irq, void *devid)
{
struct mtk_cqdma_device *cqdma = devid;
irqreturn_t ret = IRQ_NONE;
- bool schedule_tasklet = false;
+ bool schedule_work = false;
u32 i;

/* clear interrupt flags for each PC */
- for (i = 0; i < cqdma->dma_channels; ++i, schedule_tasklet = false) {
+ for (i = 0; i < cqdma->dma_channels; ++i, schedule_work = false) {
spin_lock(&cqdma->pc[i]->lock);
if (mtk_dma_read(cqdma->pc[i],
MTK_CQDMA_INT_FLAG) & MTK_CQDMA_INT_FLAG_BIT) {
@@ -398,17 +399,17 @@ static irqreturn_t mtk_cqdma_irq(int irq, void *devid)
mtk_dma_clr(cqdma->pc[i], MTK_CQDMA_INT_FLAG,
MTK_CQDMA_INT_FLAG_BIT);

- schedule_tasklet = true;
+ schedule_work = true;
ret = IRQ_HANDLED;
}
spin_unlock(&cqdma->pc[i]->lock);

- if (schedule_tasklet) {
+ if (schedule_work) {
/* disable interrupt */
disable_irq_nosync(cqdma->pc[i]->irq);

- /* schedule the tasklet to handle the transactions */
- tasklet_schedule(&cqdma->pc[i]->tasklet);
+ /* schedule the work to handle the transactions */
+ queue_work(system_bh_wq, &cqdma->pc[i]->work);
}
}

@@ -472,7 +473,7 @@ static void mtk_cqdma_issue_pending(struct dma_chan *c)
unsigned long pc_flags;
unsigned long vc_flags;

- /* acquire PC's lock before VS's lock for lock dependency in tasklet */
+ /* acquire PC's lock before VS's lock for lock dependency in work */
spin_lock_irqsave(&cvc->pc->lock, pc_flags);
spin_lock_irqsave(&cvc->vc.lock, vc_flags);

@@ -871,9 +872,9 @@ static int mtk_cqdma_probe(struct platform_device *pdev)

platform_set_drvdata(pdev, cqdma);

- /* initialize tasklet for each PC */
+ /* initialize work for each PC */
for (i = 0; i < cqdma->dma_channels; ++i)
- tasklet_setup(&cqdma->pc[i]->tasklet, mtk_cqdma_tasklet_cb);
+ INIT_WORK(&cqdma->pc[i]->work, mtk_cqdma_work_cb);

dev_info(&pdev->dev, "MediaTek CQDMA driver registered\n");

@@ -892,12 +893,12 @@ static void mtk_cqdma_remove(struct platform_device *pdev)
unsigned long flags;
int i;

- /* kill VC task */
+ /* kill VC work */
for (i = 0; i < cqdma->dma_requests; i++) {
vc = &cqdma->vc[i];

list_del(&vc->vc.chan.device_node);
- tasklet_kill(&vc->vc.task);
+ cancel_work_sync(&vc->vc.work);
}

/* disable interrupt */
@@ -910,7 +911,7 @@ static void mtk_cqdma_remove(struct platform_device *pdev)
/* Waits for any pending IRQ handlers to complete */
synchronize_irq(cqdma->pc[i]->irq);

- tasklet_kill(&cqdma->pc[i]->tasklet);
+ cancel_work_sync(&cqdma->pc[i]->work);
}

/* disable hardware */
diff --git a/drivers/dma/mediatek/mtk-hsdma.c b/drivers/dma/mediatek/mtk-hsdma.c
index 36ff11e909ea..a70eb9ae25ff 100644
--- a/drivers/dma/mediatek/mtk-hsdma.c
+++ b/drivers/dma/mediatek/mtk-hsdma.c
@@ -1020,7 +1020,7 @@ static void mtk_hsdma_remove(struct platform_device *pdev)
vc = &hsdma->vc[i];

list_del(&vc->vc.chan.device_node);
- tasklet_kill(&vc->vc.task);
+ cancel_work_sync(&vc->vc.work);
}

/* Disable DMA interrupt */
diff --git a/drivers/dma/mediatek/mtk-uart-apdma.c b/drivers/dma/mediatek/mtk-uart-apdma.c
index 1bdc1500be40..63123ff9d451 100644
--- a/drivers/dma/mediatek/mtk-uart-apdma.c
+++ b/drivers/dma/mediatek/mtk-uart-apdma.c
@@ -312,7 +312,7 @@ static void mtk_uart_apdma_free_chan_resources(struct dma_chan *chan)

free_irq(c->irq, chan);

- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.work);

vchan_free_chan_resources(&c->vc);

@@ -463,7 +463,7 @@ static void mtk_uart_apdma_free(struct mtk_uart_apdmadev *mtkd)
struct mtk_chan, vc.chan.device_node);

list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.task);
}
}

diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index 136fcaeff8dd..083ca760241d 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -17,6 +17,7 @@
#include <linux/dmapool.h>
#include <linux/of_dma.h>
#include <linux/of.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -97,7 +98,7 @@ struct mmp_pdma_chan {
* is in cyclic mode */

/* channel's basic info */
- struct tasklet_struct tasklet;
+ struct work_struct work;
u32 dcmd;
u32 drcmr;
u32 dev_addr;
@@ -204,7 +205,7 @@ static irqreturn_t mmp_pdma_chan_handler(int irq, void *dev_id)
if (clear_chan_irq(phy) != 0)
return IRQ_NONE;

- tasklet_schedule(&phy->vchan->tasklet);
+ queue_work(system_bh_wq, &phy->vchan->work);
return IRQ_HANDLED;
}

@@ -861,13 +862,13 @@ static void mmp_pdma_issue_pending(struct dma_chan *dchan)
}

/*
- * dma_do_tasklet
+ * dma_do_work
* Do call back
* Start pending list
*/
-static void dma_do_tasklet(struct tasklet_struct *t)
+static void dma_do_work(struct work_struct *t)
{
- struct mmp_pdma_chan *chan = from_tasklet(chan, t, tasklet);
+ struct mmp_pdma_chan *chan = from_work(chan, t, work);
struct mmp_pdma_desc_sw *desc, *_desc;
LIST_HEAD(chain_cleanup);
unsigned long flags;
@@ -984,7 +985,7 @@ static int mmp_pdma_chan_init(struct mmp_pdma_device *pdev, int idx, int irq)
spin_lock_init(&chan->desc_lock);
chan->dev = pdev->dev;
chan->chan.device = &pdev->device;
- tasklet_setup(&chan->tasklet, dma_do_tasklet);
+ INIT_WORK(&chan->work, dma_do_work);
INIT_LIST_HEAD(&chan->chain_pending);
INIT_LIST_HEAD(&chan->chain_running);

diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index b76fe99e1151..05971f01a1ac 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -18,6 +18,7 @@
#include <linux/device.h>
#include <linux/genalloc.h>
#include <linux/of_dma.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -102,7 +103,7 @@ struct mmp_tdma_chan {
struct device *dev;
struct dma_chan chan;
struct dma_async_tx_descriptor desc;
- struct tasklet_struct tasklet;
+ struct work_struct work;

struct mmp_tdma_desc *desc_arr;
dma_addr_t desc_arr_phys;
@@ -320,7 +321,7 @@ static irqreturn_t mmp_tdma_chan_handler(int irq, void *dev_id)
struct mmp_tdma_chan *tdmac = dev_id;

if (mmp_tdma_clear_chan_irq(tdmac) == 0) {
- tasklet_schedule(&tdmac->tasklet);
+ queue_work(system_bh_wq, &tdmac->work);
return IRQ_HANDLED;
} else
return IRQ_NONE;
@@ -346,9 +347,9 @@ static irqreturn_t mmp_tdma_int_handler(int irq, void *dev_id)
return IRQ_NONE;
}

-static void dma_do_tasklet(struct tasklet_struct *t)
+static void dma_do_work(struct work_struct *t)
{
- struct mmp_tdma_chan *tdmac = from_tasklet(tdmac, t, tasklet);
+ struct mmp_tdma_chan *tdmac = from_work(tdmac, t, work);

dmaengine_desc_get_callback_invoke(&tdmac->desc, NULL);
}
@@ -584,7 +585,7 @@ static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
tdmac->pool = pool;
tdmac->status = DMA_COMPLETE;
tdev->tdmac[tdmac->idx] = tdmac;
- tasklet_setup(&tdmac->tasklet, dma_do_tasklet);
+ INIT_WORK(&tdmac->work, dma_do_work);

/* add the channel to tdma_chan list */
list_add_tail(&tdmac->chan.device_node,
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index 68c247a46321..88a1388a78e4 100644
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -43,6 +43,7 @@
#include <linux/platform_device.h>

#include <linux/random.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -214,7 +215,7 @@ struct mpc_dma_chan {

struct mpc_dma {
struct dma_device dma;
- struct tasklet_struct tasklet;
+ struct work_struct work;
struct mpc_dma_chan channels[MPC_DMA_CHANNELS];
struct mpc_dma_regs __iomem *regs;
struct mpc_dma_tcd __iomem *tcd;
@@ -366,8 +367,8 @@ static irqreturn_t mpc_dma_irq(int irq, void *data)
mpc_dma_irq_process(mdma, in_be32(&mdma->regs->dmaintl),
in_be32(&mdma->regs->dmaerrl), 0);

- /* Schedule tasklet */
- tasklet_schedule(&mdma->tasklet);
+ /* Schedule work */
+ queue_work(system_bh_wq, &mdma->work);

return IRQ_HANDLED;
}
@@ -413,10 +414,10 @@ static void mpc_dma_process_completed(struct mpc_dma *mdma)
}
}

-/* DMA Tasklet */
-static void mpc_dma_tasklet(struct tasklet_struct *t)
+/* DMA Work */
+static void mpc_dma_work(struct work_struct *t)
{
- struct mpc_dma *mdma = from_tasklet(mdma, t, tasklet);
+ struct mpc_dma *mdma = from_work(mdma, t, work);
unsigned long flags;
uint es;

@@ -1010,7 +1011,7 @@ static int mpc_dma_probe(struct platform_device *op)
list_add_tail(&mchan->chan.device_node, &dma->channels);
}

- tasklet_setup(&mdma->tasklet, mpc_dma_tasklet);
+ INIT_WORK(&mdma->work, mpc_dma_work);

/*
* Configure DMA Engine:
@@ -1098,7 +1099,7 @@ static void mpc_dma_remove(struct platform_device *op)
}
free_irq(mdma->irq, mdma);
irq_dispose_mapping(mdma->irq);
- tasklet_kill(&mdma->tasklet);
+ cancel_work_sync(&mdma->work);
}

static const struct of_device_id mpc_dma_match[] = {
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index bcd3b623ac6c..5b8c03a43089 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -19,6 +19,7 @@
#include <linux/irqdomain.h>
#include <linux/cpumask.h>
#include <linux/platform_data/dma-mv_xor.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"
#include "mv_xor.h"
@@ -327,7 +328,7 @@ static void mv_chan_slot_cleanup(struct mv_xor_chan *mv_chan)
* some descriptors are still waiting
* to be cleaned
*/
- tasklet_schedule(&mv_chan->irq_tasklet);
+ queue_work(system_bh_wq, &mv_chan->irq_work);
}
}
}
@@ -336,9 +337,9 @@ static void mv_chan_slot_cleanup(struct mv_xor_chan *mv_chan)
mv_chan->dmachan.completed_cookie = cookie;
}

-static void mv_xor_tasklet(struct tasklet_struct *t)
+static void mv_xor_work(struct work_struct *t)
{
- struct mv_xor_chan *chan = from_tasklet(chan, t, irq_tasklet);
+ struct mv_xor_chan *chan = from_work(chan, t, irq_work);

spin_lock(&chan->lock);
mv_chan_slot_cleanup(chan);
@@ -372,7 +373,7 @@ mv_chan_alloc_slot(struct mv_xor_chan *mv_chan)
spin_unlock_bh(&mv_chan->lock);

/* try to free some slots if the allocation fails */
- tasklet_schedule(&mv_chan->irq_tasklet);
+ queue_work(system_bh_wq, &mv_chan->irq_work);

return NULL;
}
@@ -737,7 +738,7 @@ static irqreturn_t mv_xor_interrupt_handler(int irq, void *data)
if (intr_cause & XOR_INTR_ERRORS)
mv_chan_err_interrupt_handler(chan, intr_cause);

- tasklet_schedule(&chan->irq_tasklet);
+ queue_work(system_bh_wq, &chan->irq_work);

mv_chan_clear_eoc_cause(chan);

@@ -1097,7 +1098,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev,

mv_chan->mmr_base = xordev->xor_base;
mv_chan->mmr_high_base = xordev->xor_high_base;
- tasklet_setup(&mv_chan->irq_tasklet, mv_xor_tasklet);
+ INIT_WORK(&mv_chan->irq_work, mv_xor_work);

/* clear errors before enabling interrupts */
mv_chan_clear_err_status(mv_chan);
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index d86086b05b0e..80a19010e6c9 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -10,6 +10,7 @@
#include <linux/io.h>
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>

#define MV_XOR_POOL_SIZE (MV_XOR_SLOT_SIZE * 3072)
#define MV_XOR_SLOT_SIZE 64
@@ -98,7 +99,7 @@ struct mv_xor_device {
* @device: parent device
* @common: common dmaengine channel object members
* @slots_allocated: records the actual size of the descriptor slot pool
- * @irq_tasklet: bottom half where mv_xor_slot_cleanup runs
+ * @irq_work: bottom half where mv_xor_slot_cleanup runs
* @op_in_desc: new mode of driver, each op is writen to descriptor.
*/
struct mv_xor_chan {
@@ -118,7 +119,7 @@ struct mv_xor_chan {
struct dma_device dmadev;
struct dma_chan dmachan;
int slots_allocated;
- struct tasklet_struct irq_tasklet;
+ struct work_struct irq_work;
int op_in_desc;
char dummy_src[MV_XOR_MIN_BYTE_COUNT];
char dummy_dst[MV_XOR_MIN_BYTE_COUNT];
diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index 97ebc791a30b..bfa683f02d26 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -14,6 +14,7 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -139,7 +140,7 @@ struct mv_xor_v2_descriptor {
* @reg_clk: reference to the 'reg' clock
* @dma_base: memory mapped DMA register base
* @glob_base: memory mapped global register base
- * @irq_tasklet: tasklet used for IRQ handling call-backs
+ * @irq_work: work used for IRQ handling call-backs
* @free_sw_desc: linked list of free SW descriptors
* @dmadev: dma device
* @dmachan: dma channel
@@ -158,7 +159,7 @@ struct mv_xor_v2_device {
void __iomem *glob_base;
struct clk *clk;
struct clk *reg_clk;
- struct tasklet_struct irq_tasklet;
+ struct work_struct irq_work;
struct list_head free_sw_desc;
struct dma_device dmadev;
struct dma_chan dmachan;
@@ -290,8 +291,8 @@ static irqreturn_t mv_xor_v2_interrupt_handler(int irq, void *data)
if (!ndescs)
return IRQ_NONE;

- /* schedule a tasklet to handle descriptors callbacks */
- tasklet_schedule(&xor_dev->irq_tasklet);
+ /* schedule a work to handle descriptors callbacks */
+ queue_work(system_bh_wq, &xor_dev->irq_work);

return IRQ_HANDLED;
}
@@ -346,8 +347,8 @@ mv_xor_v2_prep_sw_desc(struct mv_xor_v2_device *xor_dev)

if (list_empty(&xor_dev->free_sw_desc)) {
spin_unlock_bh(&xor_dev->lock);
- /* schedule tasklet to free some descriptors */
- tasklet_schedule(&xor_dev->irq_tasklet);
+ /* schedule work to free some descriptors */
+ queue_work(system_bh_wq, &xor_dev->irq_work);
return NULL;
}

@@ -553,10 +554,10 @@ int mv_xor_v2_get_pending_params(struct mv_xor_v2_device *xor_dev,
/*
* handle the descriptors after HW process
*/
-static void mv_xor_v2_tasklet(struct tasklet_struct *t)
+static void mv_xor_v2_work(struct work_struct *t)
{
- struct mv_xor_v2_device *xor_dev = from_tasklet(xor_dev, t,
- irq_tasklet);
+ struct mv_xor_v2_device *xor_dev = from_work(xor_dev, t,
+ irq_work);
int pending_ptr, num_of_pending, i;
struct mv_xor_v2_sw_desc *next_pending_sw_desc = NULL;

@@ -760,7 +761,7 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
if (ret)
goto free_msi_irqs;

- tasklet_setup(&xor_dev->irq_tasklet, mv_xor_v2_tasklet);
+ INIT_WORK(&xor_dev->irq_work, mv_xor_v2_work);

xor_dev->desc_size = mv_xor_v2_set_desc_size(xor_dev);

@@ -869,7 +870,7 @@ static void mv_xor_v2_remove(struct platform_device *pdev)

platform_device_msi_free_irqs_all(&pdev->dev);

- tasklet_kill(&xor_dev->irq_tasklet);
+ cancel_work_sync(&xor_dev->irq_work);
}

#ifdef CONFIG_OF
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index cfb9962417ef..6131e130dfc6 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -24,6 +24,7 @@
#include <linux/of_dma.h>
#include <linux/list.h>
#include <linux/dma/mxs-dma.h>
+#include <linux/workqueue.h>

#include <asm/irq.h>

@@ -109,7 +110,7 @@ struct mxs_dma_chan {
struct mxs_dma_engine *mxs_dma;
struct dma_chan chan;
struct dma_async_tx_descriptor desc;
- struct tasklet_struct tasklet;
+ struct work_struct work;
unsigned int chan_irq;
struct mxs_dma_ccw *ccw;
dma_addr_t ccw_phys;
@@ -300,9 +301,9 @@ static dma_cookie_t mxs_dma_tx_submit(struct dma_async_tx_descriptor *tx)
return dma_cookie_assign(tx);
}

-static void mxs_dma_tasklet(struct tasklet_struct *t)
+static void mxs_dma_work(struct work_struct *t)
{
- struct mxs_dma_chan *mxs_chan = from_tasklet(mxs_chan, t, tasklet);
+ struct mxs_dma_chan *mxs_chan = from_work(mxs_chan, t, work);

dmaengine_desc_get_callback_invoke(&mxs_chan->desc, NULL);
}
@@ -386,8 +387,8 @@ static irqreturn_t mxs_dma_int_handler(int irq, void *dev_id)
dma_cookie_complete(&mxs_chan->desc);
}

- /* schedule tasklet on this channel */
- tasklet_schedule(&mxs_chan->tasklet);
+ /* schedule work on this channel */
+ queue_work(system_bh_wq, &mxs_chan->work);

return IRQ_HANDLED;
}
@@ -782,7 +783,7 @@ static int mxs_dma_probe(struct platform_device *pdev)
mxs_chan->chan.device = &mxs_dma->dma_device;
dma_cookie_init(&mxs_chan->chan);

- tasklet_setup(&mxs_chan->tasklet, mxs_dma_tasklet);
+ INIT_WORK(&mxs_chan->work, mxs_dma_work);

/* Add the channel to mxs_chan list */
diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c
index c08916339aa7..49bf42a41c7a 100644
--- a/drivers/dma/nbpfaxi.c
+++ b/drivers/dma/nbpfaxi.c
@@ -18,6 +18,7 @@
#include <linux/of_dma.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>

#include <dt-bindings/dma/nbpfaxi.h>

@@ -174,7 +175,7 @@ struct nbpf_desc_page {
/**
* struct nbpf_channel - one DMAC channel
* @dma_chan: standard dmaengine channel object
- * @tasklet: channel specific tasklet used for callbacks
+ * @work: channel specific work used for callbacks
* @base: register address base
* @nbpf: DMAC
* @name: IRQ name
@@ -200,7 +201,7 @@ struct nbpf_desc_page {
*/
struct nbpf_channel {
struct dma_chan dma_chan;
- struct tasklet_struct tasklet;
+ struct work_struct work;
void __iomem *base;
struct nbpf_device *nbpf;
char name[16];
@@ -1112,9 +1113,9 @@ static struct dma_chan *nbpf_of_xlate(struct of_phandle_args *dma_spec,
return dchan;
}

-static void nbpf_chan_tasklet(struct tasklet_struct *t)
+static void nbpf_chan_work(struct work_struct *t)
{
- struct nbpf_channel *chan = from_tasklet(chan, t, tasklet);
+ struct nbpf_channel *chan = from_work(chan, t, work);
struct nbpf_desc *desc, *tmp;
struct dmaengine_desc_callback cb;

@@ -1215,7 +1216,7 @@ static irqreturn_t nbpf_chan_irq(int irq, void *dev)
spin_unlock(&chan->lock);

if (bh)
- tasklet_schedule(&chan->tasklet);
+ queue_work(system_bh_wq, &chan->work);

return ret;
}
@@ -1259,7 +1260,7 @@ static int nbpf_chan_probe(struct nbpf_device *nbpf, int n)

snprintf(chan->name, sizeof(chan->name), "nbpf %d", n);

- tasklet_setup(&chan->tasklet, nbpf_chan_tasklet);
+ INIT_WORK(&chan->work, nbpf_chan_work);
ret = devm_request_irq(dma_dev->dev, chan->irq,
nbpf_chan_irq, IRQF_SHARED,
chan->name, chan);
@@ -1466,7 +1467,7 @@ static void nbpf_remove(struct platform_device *pdev)

devm_free_irq(&pdev->dev, chan->irq, chan);

- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);
}

of_dma_controller_free(pdev->dev.of_node);
diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c
index 4e76c4ec2d39..026dd32c5a16 100644
--- a/drivers/dma/owl-dma.c
+++ b/drivers/dma/owl-dma.c
@@ -1055,7 +1055,7 @@ static inline void owl_dma_free(struct owl_dma *od)
list_for_each_entry_safe(vchan,
next, &od->dma.channels, vc.chan.device_node) {
list_del(&vchan->vc.chan.device_node);
- tasklet_kill(&vchan->vc.task);
+ cancel_work_sync(&vchan->vc.work);
}
}

diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index c359decc07a3..df9fd33c0740 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -13,6 +13,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pch_dma.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -91,7 +92,7 @@ struct pch_dma_chan {
struct dma_chan chan;
void __iomem *membase;
enum dma_transfer_direction dir;
- struct tasklet_struct tasklet;
+ struct work_struct work;
unsigned long err_status;

spinlock_t lock;
@@ -670,14 +671,14 @@ static int pd_device_terminate_all(struct dma_chan *chan)
return 0;
}

-static void pdc_tasklet(struct tasklet_struct *t)
+static void pdc_work(struct work_struct *t)
{
- struct pch_dma_chan *pd_chan = from_tasklet(pd_chan, t, tasklet);
+ struct pch_dma_chan *pd_chan = from_work(pd_chan, t, work);
unsigned long flags;

if (!pdc_is_idle(pd_chan)) {
dev_err(chan2dev(&pd_chan->chan),
- "BUG: handle non-idle channel in tasklet\n");
+ "BUG: handle non-idle channel in work\n");
return;
}

@@ -712,7 +713,7 @@ static irqreturn_t pd_irq(int irq, void *devid)
if (sts0 & DMA_STATUS0_ERR(i))
set_bit(0, &pd_chan->err_status);

- tasklet_schedule(&pd_chan->tasklet);
+ queue_work(system_bh_wq, &pd_chan->work);
ret0 = IRQ_HANDLED;
}
} else {
@@ -720,7 +721,7 @@ static irqreturn_t pd_irq(int irq, void *devid)
if (sts2 & DMA_STATUS2_ERR(i))
set_bit(0, &pd_chan->err_status);

- tasklet_schedule(&pd_chan->tasklet);
+ queue_work(system_bh_wq, &pd_chan->work);
ret2 = IRQ_HANDLED;
}
}
@@ -882,7 +883,7 @@ static int pch_dma_probe(struct pci_dev *pdev,
INIT_LIST_HEAD(&pd_chan->queue);
INIT_LIST_HEAD(&pd_chan->free_list);

- tasklet_setup(&pd_chan->tasklet, pdc_tasklet);
+ INIT_WORK(&pd_chan->work, pdc_work);
list_add_tail(&pd_chan->chan.device_node, &pd->dma.channels);
}

@@ -935,7 +936,7 @@ static void pch_dma_remove(struct pci_dev *pdev)
device_node) {
pd_chan = to_pd_chan(chan);

- tasklet_kill(&pd_chan->tasklet);
+ cancel_work_sync(&pd_chan->work);
}

dma_pool_destroy(pd->pool);
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 5f6d7f1e095f..74ee0dfb638a 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -26,6 +26,7 @@
#include <linux/pm_runtime.h>
#include <linux/bug.h>
#include <linux/reset.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"
#define PL330_MAX_CHAN 8
@@ -360,7 +361,7 @@ struct _pl330_req {
struct dma_pl330_desc *desc;
};

-/* ToBeDone for tasklet */
+/* ToBeDone for work */
struct _pl330_tbd {
bool reset_dmac;
bool reset_mngr;
@@ -418,7 +419,7 @@ enum desc_status {

struct dma_pl330_chan {
/* Schedule desc completion */
- struct tasklet_struct task;
+ struct work_struct work;

/* DMA-Engine Channel */
struct dma_chan chan;
@@ -490,7 +491,7 @@ struct pl330_dmac {
/* Pointer to the MANAGER thread */
struct pl330_thread *manager;
/* To handle bad news in interrupt */
- struct tasklet_struct tasks;
+ struct work_struct tasks;
struct _pl330_tbd dmac_tbd;
/* State of DMAC operation */
enum pl330_dmac_state state;
@@ -1577,12 +1578,12 @@ static void dma_pl330_rqcb(struct dma_pl330_desc *desc, enum pl330_op_err err)

spin_unlock_irqrestore(&pch->lock, flags);

- tasklet_schedule(&pch->task);
+ queue_work(system_bh_wq, &pch->work);
}

-static void pl330_dotask(struct tasklet_struct *t)
+static void pl330_dotask(struct work_struct *t)
{
- struct pl330_dmac *pl330 = from_tasklet(pl330, t, tasks);
+ struct pl330_dmac *pl330 = from_work(pl330, t, tasks);
unsigned long flags;
int i;

@@ -1735,7 +1736,7 @@ static int pl330_update(struct pl330_dmac *pl330)
|| pl330->dmac_tbd.reset_mngr
|| pl330->dmac_tbd.reset_chan) {
ret = 1;
- tasklet_schedule(&pl330->tasks);
+ queue_work(system_bh_wq, &pl330->tasks);
}

return ret;
@@ -1986,7 +1987,7 @@ static int pl330_add(struct pl330_dmac *pl330)
return ret;
}

- tasklet_setup(&pl330->tasks, pl330_dotask);
+ INIT_WORK(&pl330->tasks, pl330_dotask);

pl330->state = INIT;

@@ -2014,7 +2015,7 @@ static void pl330_del(struct pl330_dmac *pl330)
{
pl330->state = UNINIT;

- tasklet_kill(&pl330->tasks);
+ cancel_work_sync(&pl330->tasks);

/* Free DMAC resources */
dmac_free_threads(pl330);
@@ -2064,14 +2065,14 @@ static inline void fill_queue(struct dma_pl330_chan *pch)
desc->status = DONE;
dev_err(pch->dmac->ddma.dev, "%s:%d Bad Desc(%d)\n",
__func__, __LINE__, desc->txd.cookie);
- tasklet_schedule(&pch->task);
+ queue_work(system_bh_wq, &pch->work);
}
}
}

-static void pl330_tasklet(struct tasklet_struct *t)
+static void pl330_work(struct work_struct *t)
{
- struct dma_pl330_chan *pch = from_tasklet(pch, t, task);
+ struct dma_pl330_chan *pch = from_work(pch, t, work);
struct dma_pl330_desc *desc, *_dt;
unsigned long flags;
bool power_down = false;
@@ -2179,7 +2180,7 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan)
return -ENOMEM;
}

- tasklet_setup(&pch->task, pl330_tasklet);
+ INIT_WORK(&pch->work, pl330_work);

spin_unlock_irqrestore(&pl330->lock, flags);

@@ -2362,7 +2363,7 @@ static void pl330_free_chan_resources(struct dma_chan *chan)
struct pl330_dmac *pl330 = pch->dmac;
unsigned long flags;

- tasklet_kill(&pch->task);
+ cancel_work_sync(&pch->work);

pm_runtime_get_sync(pch->dmac->ddma.dev);
spin_lock_irqsave(&pl330->lock, flags);
@@ -2499,7 +2500,7 @@ static void pl330_issue_pending(struct dma_chan *chan)
list_splice_tail_init(&pch->submitted_list, &pch->work_list);
spin_unlock_irqrestore(&pch->lock, flags);

- pl330_tasklet(&pch->task);
+ pl330_work(&pch->work);
}

/*
diff --git a/drivers/dma/plx_dma.c b/drivers/dma/plx_dma.c
index 34b6416c3287..07e185fb8d2c 100644
--- a/drivers/dma/plx_dma.c
+++ b/drivers/dma/plx_dma.c
@@ -13,6 +13,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/workqueue.h>

MODULE_DESCRIPTION("PLX ExpressLane PEX PCI Switch DMA Engine");
MODULE_VERSION("0.1");
@@ -105,7 +106,7 @@ struct plx_dma_dev {
struct dma_chan dma_chan;
struct pci_dev __rcu *pdev;
void __iomem *bar;
- struct tasklet_struct desc_task;
+ struct work_struct desc_task;

spinlock_t ring_lock;
bool ring_active;
@@ -241,9 +242,9 @@ static void plx_dma_stop(struct plx_dma_dev *plxdev)
rcu_read_unlock();
}

-static void plx_dma_desc_task(struct tasklet_struct *t)
+static void plx_dma_desc_task(struct work_struct *t)
{
- struct plx_dma_dev *plxdev = from_tasklet(plxdev, t, desc_task);
+ struct plx_dma_dev *plxdev = from_work(plxdev, t, desc_task);

plx_dma_process_desc(plxdev);
}
@@ -366,7 +367,7 @@ static irqreturn_t plx_dma_isr(int irq, void *devid)
return IRQ_NONE;

if (status & PLX_REG_INTR_STATUS_DESC_DONE && plxdev->ring_active)
- tasklet_schedule(&plxdev->desc_task);
+ queue_work(system_bh_wq, &plxdev->desc_task);

writew(status, plxdev->bar + PLX_REG_INTR_STATUS);

@@ -472,7 +473,7 @@ static void plx_dma_free_chan_resources(struct dma_chan *chan)
if (irq > 0)
synchronize_irq(irq);

- tasklet_kill(&plxdev->desc_task);
+ cancel_work_sync(&plxdev->desc_task);

plx_dma_abort_desc(plxdev);

@@ -511,7 +512,7 @@ static int plx_dma_create(struct pci_dev *pdev)
goto free_plx;

spin_lock_init(&plxdev->ring_lock);
- tasklet_setup(&plxdev->desc_task, plx_dma_desc_task);
+ INIT_WORK(&plxdev->desc_task, plx_dma_desc_task);

RCU_INIT_POINTER(plxdev->pdev, pdev);
plxdev->bar = pcim_iomap_table(pdev)[0];
diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index bbb60a970dab..a9e1c0e43fed 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -29,6 +29,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
+#include <linux/workqueue.h>
#include <asm/dcr.h>
#include <asm/dcr-regs.h>
#include "adma.h"
@@ -1656,11 +1657,11 @@ static void __ppc440spe_adma_slot_cleanup(struct ppc440spe_adma_chan *chan)
}

/**
- * ppc440spe_adma_tasklet - clean up watch-dog initiator
+ * ppc440spe_adma_work - clean up watch-dog initiator
*/
-static void ppc440spe_adma_tasklet(struct tasklet_struct *t)
+static void ppc440spe_adma_work(struct work_struct *t)
{
- struct ppc440spe_adma_chan *chan = from_tasklet(chan, t, irq_tasklet);
+ struct ppc440spe_adma_chan *chan = from_work(chan, t, irq_work);

spin_lock_nested(&chan->lock, SINGLE_DEPTH_NESTING);
__ppc440spe_adma_slot_cleanup(chan);
@@ -1754,7 +1755,7 @@ static struct ppc440spe_adma_desc_slot *ppc440spe_adma_alloc_slots(
goto retry;

/* try to free some slots if the allocation fails */
- tasklet_schedule(&chan->irq_tasklet);
+ queue_work(system_bh_wq, &chan->irq_work);
return NULL;
}

@@ -3596,7 +3597,7 @@ static irqreturn_t ppc440spe_adma_eot_handler(int irq, void *data)
dev_dbg(chan->device->common.dev,
"ppc440spe adma%d: %s\n", chan->device->id, __func__);

- tasklet_schedule(&chan->irq_tasklet);
+ queue_work(system_bh_wq, &chan->irq_work);
ppc440spe_adma_device_clear_eot_status(chan);

return IRQ_HANDLED;
@@ -3613,7 +3614,7 @@ static irqreturn_t ppc440spe_adma_err_handler(int irq, void *data)
dev_dbg(chan->device->common.dev,
"ppc440spe adma%d: %s\n", chan->device->id, __func__);

- tasklet_schedule(&chan->irq_tasklet);
+ queue_work(system_bh_wq, &chan->irq_work);
ppc440spe_adma_device_clear_eot_status(chan);

return IRQ_HANDLED;
@@ -4138,7 +4139,7 @@ static int ppc440spe_adma_probe(struct platform_device *ofdev)
chan->common.device = &adev->common;
dma_cookie_init(&chan->common);
list_add_tail(&chan->common.device_node, &adev->common.channels);
- tasklet_setup(&chan->irq_tasklet, ppc440spe_adma_tasklet);
+ INIT_WORK(&chan->irq_work, ppc440spe_adma_work);

/* allocate and map helper pages for async validation or
* async_mult/async_sum_product operations on DMA0/1.
@@ -4248,7 +4249,7 @@ static void ppc440spe_adma_remove(struct platform_device *ofdev)
device_node) {
ppc440spe_chan = to_ppc440spe_adma_chan(chan);
ppc440spe_adma_release_irqs(adev, ppc440spe_chan);
- tasklet_kill(&ppc440spe_chan->irq_tasklet);
+ cancel_work_sync(&ppc440spe_chan->irq_work);
if (adev->id != PPC440SPE_XOR_ID) {
dma_unmap_page(&ofdev->dev, ppc440spe_chan->pdest,
PAGE_SIZE, DMA_BIDIRECTIONAL);
diff --git a/drivers/dma/ppc4xx/adma.h b/drivers/dma/ppc4xx/adma.h
index f8a5d7c1fb40..e3918cfcc5ae 100644
--- a/drivers/dma/ppc4xx/adma.h
+++ b/drivers/dma/ppc4xx/adma.h
@@ -9,6 +9,7 @@
#define _PPC440SPE_ADMA_H

#include <linux/types.h>
+#include <linux/workqueue.h>
#include "dma.h"
#include "xor.h"

@@ -80,7 +81,7 @@ struct ppc440spe_adma_device {
* @pending: allows batching of hardware operations
* @slots_allocated: records the actual size of the descriptor slot pool
* @hw_chain_inited: h/w descriptor chain initialization flag
- * @irq_tasklet: bottom half where ppc440spe_adma_slot_cleanup runs
+ * @irq_work: bottom half where ppc440spe_adma_slot_cleanup runs
* @needs_unmap: if buffers should not be unmapped upon final processing
* @pdest_page: P destination page for async validate operation
* @qdest_page: Q destination page for async validate operation
@@ -97,7 +98,7 @@ struct ppc440spe_adma_chan {
int pending;
int slots_allocated;
int hw_chain_inited;
- struct tasklet_struct irq_tasklet;
+ struct work_struct irq_work;
u8 needs_unmap;
struct page *pdest_page;
struct page *qdest_page;
diff --git a/drivers/dma/pxa_dma.c b/drivers/dma/pxa_dma.c
index 31f8da810c05..174c2fee1fcc 100644
--- a/drivers/dma/pxa_dma.c
+++ b/drivers/dma/pxa_dma.c
@@ -1218,7 +1218,7 @@ static void pxad_free_channels(struct dma_device *dmadev)
list_for_each_entry_safe(c, cn, &dmadev->channels,
vc.chan.device_node) {
list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.task);
}
}

diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index 5e7d332731e0..71e43150793a 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -41,6 +41,7 @@
#include <linux/clk.h>
#include <linux/dmaengine.h>
#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>

#include "../dmaengine.h"
#include "../virt-dma.h"
@@ -396,8 +397,8 @@ struct bam_device {
struct clk *bamclk;
int irq;

- /* dma start transaction tasklet */
- struct tasklet_struct task;
+ /* dma start transaction work */
+ struct work_struct work;
};

/**
@@ -875,7 +876,7 @@ static u32 process_channel_irqs(struct bam_device *bdev)
/*
* if complete, process cookie. Otherwise
* push back to front of desc_issued so that
- * it gets restarted by the tasklet
+ * it gets restarted by the work
*/
if (!async_desc->num_desc) {
vchan_cookie_complete(&async_desc->vd);
@@ -907,9 +908,9 @@ static irqreturn_t bam_dma_irq(int irq, void *data)

srcs |= process_channel_irqs(bdev);

- /* kick off tasklet to start next dma transfer */
+ /* kick off work to start next dma transfer */
if (srcs & P_IRQ)
- tasklet_schedule(&bdev->task);
+ queue_work(system_bh_wq, &bdev->work);

ret = pm_runtime_get_sync(bdev->dev);
if (ret < 0)
@@ -1107,14 +1108,14 @@ static void bam_start_dma(struct bam_chan *bchan)
}

/**
- * dma_tasklet - DMA IRQ tasklet
- * @t: tasklet argument (bam controller structure)
+ * dma_work - DMA IRQ work
+ * @t: work argument (bam controller structure)
*
* Sets up next DMA operation and then processes all completed transactions
*/
-static void dma_tasklet(struct tasklet_struct *t)
+static void dma_work(struct work_struct *t)
{
- struct bam_device *bdev = from_tasklet(bdev, t, task);
+ struct bam_device *bdev = from_work(bdev, t, work);
struct bam_chan *bchan;
unsigned long flags;
unsigned int i;
@@ -1135,7 +1136,7 @@ static void dma_tasklet(struct tasklet_struct *t)
* bam_issue_pending - starts pending transactions
* @chan: dma channel
*
- * Calls tasklet directly which in turn starts any pending transactions
+ * Calls work directly which in turn starts any pending transactions
*/
static void bam_issue_pending(struct dma_chan *chan)
{
@@ -1302,14 +1303,14 @@ static int bam_dma_probe(struct platform_device *pdev)
if (ret)
goto err_disable_clk;

- tasklet_setup(&bdev->task, dma_tasklet);
+ INIT_WORK(&bdev->work, dma_work);

bdev->channels = devm_kcalloc(bdev->dev, bdev->num_channels,
sizeof(*bdev->channels), GFP_KERNEL);

if (!bdev->channels) {
ret = -ENOMEM;
- goto err_tasklet_kill;
+ goto err_work_kill;
}

/* allocate and initialize channels */
@@ -1377,9 +1378,9 @@ static int bam_dma_probe(struct platform_device *pdev)
dma_async_device_unregister(&bdev->common);
err_bam_channel_exit:
for (i = 0; i < bdev->num_channels; i++)
- tasklet_kill(&bdev->channels[i].vc.task);
-err_tasklet_kill:
- tasklet_kill(&bdev->task);
+ cancel_work_sync(&bdev->channels[i].vc.work);
+err_work_kill:
+ cancel_work_sync(&bdev->work);
err_disable_clk:
clk_disable_unprepare(bdev->bamclk);

@@ -1403,7 +1404,7 @@ static void bam_dma_remove(struct platform_device *pdev)

for (i = 0; i < bdev->num_channels; i++) {
bam_dma_terminate_all(&bdev->channels[i].vc.chan);
- tasklet_kill(&bdev->channels[i].vc.task);
+ cancel_work_sync(&bdev->channels[i].vc.work);

if (!bdev->channels[i].fifo_virt)
continue;
@@ -1413,7 +1414,7 @@ static void bam_dma_remove(struct platform_device *pdev)
bdev->channels[i].fifo_phys);
}

- tasklet_kill(&bdev->task);
+ cancel_work_sync(&bdev->work);

clk_disable_unprepare(bdev->bamclk);
}
diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c
index 1c93864e0e4d..a777cfc799fd 100644
--- a/drivers/dma/qcom/gpi.c
+++ b/drivers/dma/qcom/gpi.c
@@ -14,6 +14,7 @@
#include <linux/dma/qcom-gpi-dma.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>
#include "../dmaengine.h"
#include "../virt-dma.h"

@@ -515,7 +516,7 @@ struct gpii {
enum gpi_pm_state pm_state;
rwlock_t pm_lock;
struct gpi_ring ev_ring;
- struct tasklet_struct ev_task; /* event processing tasklet */
+ struct work_struct ev_task; /* event processing work */
struct completion cmd_completion;
enum gpi_cmd gpi_cmd;
u32 cntxt_type_irq_msk;
@@ -755,7 +756,7 @@ static void gpi_process_ieob(struct gpii *gpii)
gpi_write_reg(gpii, gpii->ieob_clr_reg, BIT(0));

gpi_config_interrupts(gpii, MASK_IEOB_SETTINGS, 0);
- tasklet_hi_schedule(&gpii->ev_task);
+ queue_work(system_bh_highpri_wq, &gpii->ev_task);
}

/* process channel control interrupt */
@@ -1145,10 +1146,10 @@ static void gpi_process_events(struct gpii *gpii)
} while (rp != ev_ring->rp);
}

-/* processing events using tasklet */
-static void gpi_ev_tasklet(unsigned long data)
+/* processing events using work */
+static void gpi_ev_work(struct work_struct *t)
{
- struct gpii *gpii = (struct gpii *)data;
+ struct gpii *gpii = from_work(gpii, t, ev_task);

read_lock(&gpii->pm_lock);
if (!REG_ACCESS_VALID(gpii->pm_state)) {
@@ -1565,7 +1566,7 @@ static int gpi_pause(struct dma_chan *chan)
disable_irq(gpii->irq);

/* Wait for threads to complete out */
- tasklet_kill(&gpii->ev_task);
+ cancel_work_sync(&gpii->ev_task);

write_lock_irq(&gpii->pm_lock);
gpii->pm_state = PAUSE_STATE;
@@ -2018,7 +2019,7 @@ static void gpi_free_chan_resources(struct dma_chan *chan)
write_unlock_irq(&gpii->pm_lock);

/* wait for threads to complete out */
- tasklet_kill(&gpii->ev_task);
+ cancel_work_sync(&gpii->ev_task);

/* send command to de allocate event ring */
if (cur_state == ACTIVE_STATE)
@@ -2237,8 +2238,7 @@ static int gpi_probe(struct platform_device *pdev)
}
mutex_init(&gpii->ctrl_lock);
rwlock_init(&gpii->pm_lock);
- tasklet_init(&gpii->ev_task, gpi_ev_tasklet,
- (unsigned long)gpii);
+ INIT_WORK(&gpii->ev_task, gpi_ev_work);
init_completion(&gpii->cmd_completion);
gpii->gpii_id = i;
gpii->regs = gpi_dev->ee_base;
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index 202ac95227cb..cf540ffbb7b7 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -58,6 +58,7 @@
#include <linux/atomic.h>
#include <linux/pm_runtime.h>
#include <linux/msi.h>
+#include <linux/workqueue.h>

#include "../dmaengine.h"
#include "hidma.h"
@@ -217,9 +218,9 @@ static int hidma_chan_init(struct hidma_dev *dmadev, u32 dma_sig)
return 0;
}

-static void hidma_issue_task(struct tasklet_struct *t)
+static void hidma_issue_task(struct work_struct *t)
{
- struct hidma_dev *dmadev = from_tasklet(dmadev, t, task);
+ struct hidma_dev *dmadev = from_work(dmadev, t, work);

pm_runtime_get_sync(dmadev->ddev.dev);
hidma_ll_start(dmadev->lldev);
@@ -250,7 +251,7 @@ static void hidma_issue_pending(struct dma_chan *dmach)
/* PM will be released in hidma_callback function. */
status = pm_runtime_get(dmadev->ddev.dev);
if (status < 0)
- tasklet_schedule(&dmadev->task);
+ queue_work(system_bh_wq, &dmadev->work);
else
hidma_ll_start(dmadev->lldev);
}
@@ -879,7 +880,7 @@ static int hidma_probe(struct platform_device *pdev)
goto uninit;

dmadev->irq = chirq;
- tasklet_setup(&dmadev->task, hidma_issue_task);
+ INIT_WORK(&dmadev->work, hidma_issue_task);
hidma_debug_init(dmadev);
hidma_sysfs_init(dmadev);
dev_info(&pdev->dev, "HI-DMA engine driver registration complete\n");
@@ -926,7 +927,7 @@ static void hidma_remove(struct platform_device *pdev)
else
hidma_free_msis(dmadev);

- tasklet_kill(&dmadev->task);
+ cancel_work_sync(&dmadev->work);
hidma_sysfs_uninit(dmadev);
hidma_debug_uninit(dmadev);
hidma_ll_uninit(dmadev->lldev);
diff --git a/drivers/dma/qcom/hidma.h b/drivers/dma/qcom/hidma.h
index f212466744f3..a6140c9bef76 100644
--- a/drivers/dma/qcom/hidma.h
+++ b/drivers/dma/qcom/hidma.h
@@ -11,6 +11,7 @@
#include <linux/kfifo.h>
#include <linux/interrupt.h>
#include <linux/dmaengine.h>
+#include <linux/workqueue.h>

#define HIDMA_TRE_SIZE 32 /* each TRE is 32 bytes */
#define HIDMA_TRE_CFG_IDX 0
@@ -69,7 +70,7 @@ struct hidma_lldev {
u32 evre_processed_off; /* last processed EVRE */

u32 tre_write_offset; /* TRE write location */
- struct tasklet_struct task; /* task delivering notifications */
+ struct work_struct work; /* work delivering notifications */
DECLARE_KFIFO_PTR(handoff_fifo,
struct hidma_tre *); /* pending TREs FIFO */
};
@@ -129,7 +130,7 @@ struct hidma_dev {
struct device_attribute *chid_attrs;

/* Task delivering issue_pending */
- struct tasklet_struct task;
+ struct work_struct work;
};

int hidma_ll_request(struct hidma_lldev *llhndl, u32 dev_id,
diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c
index 53244e0e34a3..ebe037bb85e5 100644
--- a/drivers/dma/qcom/hidma_ll.c
+++ b/drivers/dma/qcom/hidma_ll.c
@@ -16,6 +16,7 @@
#include <linux/iopoll.h>
#include <linux/kfifo.h>
#include <linux/bitops.h>
+#include <linux/workqueue.h>

#include "hidma.h"

@@ -173,9 +174,9 @@ int hidma_ll_request(struct hidma_lldev *lldev, u32 sig, const char *dev_name,
/*
* Multiple TREs may be queued and waiting in the pending queue.
*/
-static void hidma_ll_tre_complete(struct tasklet_struct *t)
+static void hidma_ll_tre_complete(struct work_struct *t)
{
- struct hidma_lldev *lldev = from_tasklet(lldev, t, task);
+ struct hidma_lldev *lldev = from_work(lldev, t, work);
struct hidma_tre *tre;

while (kfifo_out(&lldev->handoff_fifo, &tre, 1)) {
@@ -223,7 +224,7 @@ static int hidma_post_completed(struct hidma_lldev *lldev, u8 err_info,
tre->queued = 0;

kfifo_put(&lldev->handoff_fifo, tre);
- tasklet_schedule(&lldev->task);
+ queue_work(system_bh_wq, &lldev->work);

return 0;
}
@@ -792,7 +793,7 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres,
return NULL;

spin_lock_init(&lldev->lock);
- tasklet_setup(&lldev->task, hidma_ll_tre_complete);
+ INIT_WORK(&lldev->work, hidma_ll_tre_complete);
lldev->initialized = 1;
writel(ENABLE_IRQS, lldev->evca + HIDMA_EVCA_IRQ_EN_REG);
return lldev;
@@ -813,7 +814,7 @@ int hidma_ll_uninit(struct hidma_lldev *lldev)
lldev->initialized = 0;

required_bytes = sizeof(struct hidma_tre) * lldev->nr_tres;
- tasklet_kill(&lldev->task);
+ cancel_work_sync(&lldev->work);
memset(lldev->trepool, 0, required_bytes);
lldev->trepool = NULL;
atomic_set(&lldev->pending_tre_count, 0);
diff --git a/drivers/dma/qcom/qcom_adm.c b/drivers/dma/qcom/qcom_adm.c
index 53f4273b657c..0cc3b77899d2 100644
--- a/drivers/dma/qcom/qcom_adm.c
+++ b/drivers/dma/qcom/qcom_adm.c
@@ -919,7 +919,7 @@ static void adm_dma_remove(struct platform_device *pdev)
/* mask IRQs for this channel/EE pair */
writel(0, adev->regs + ADM_CH_RSLT_CONF(achan->id, adev->ee));

- tasklet_kill(&adev->channels[i].vc.task);
+ cancel_work_sync(&adev->channels[i].vc.work);
adm_terminate_all(&adev->channels[i].vc.chan);
}

diff --git a/drivers/dma/sa11x0-dma.c b/drivers/dma/sa11x0-dma.c
index 01e656c69e6c..888fe2311572 100644
--- a/drivers/dma/sa11x0-dma.c
+++ b/drivers/dma/sa11x0-dma.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/workqueue.h>

#include "virt-dma.h"

@@ -118,7 +119,7 @@ struct sa11x0_dma_dev {
struct dma_device slave;
void __iomem *base;
spinlock_t lock;
- struct tasklet_struct task;
+ struct work_struct work;
struct list_head chan_pending;
struct sa11x0_dma_phy phy[NR_PHY_CHAN];
};
@@ -232,7 +233,7 @@ static void noinline sa11x0_dma_complete(struct sa11x0_dma_phy *p,
p->txd_done = p->txd_load;

if (!p->txd_done)
- tasklet_schedule(&p->dev->task);
+ queue_work(system_bh_wq, &p->dev->work);
} else {
if ((p->sg_done % txd->period) == 0)
vchan_cyclic_callback(&txd->vd);
@@ -323,14 +324,14 @@ static void sa11x0_dma_start_txd(struct sa11x0_dma_chan *c)
}
}

-static void sa11x0_dma_tasklet(struct tasklet_struct *t)
+static void sa11x0_dma_work(struct work_struct *t)
{
- struct sa11x0_dma_dev *d = from_tasklet(d, t, task);
+ struct sa11x0_dma_dev *d = from_work(d, t, work);
struct sa11x0_dma_phy *p;
struct sa11x0_dma_chan *c;
unsigned pch, pch_alloc = 0;

- dev_dbg(d->slave.dev, "tasklet enter\n");
+ dev_dbg(d->slave.dev, "work enter\n");

list_for_each_entry(c, &d->slave.channels, vc.chan.device_node) {
spin_lock_irq(&c->vc.lock);
@@ -381,7 +382,7 @@ static void sa11x0_dma_tasklet(struct tasklet_struct *t)
}
}

- dev_dbg(d->slave.dev, "tasklet exit\n");
+ dev_dbg(d->slave.dev, "work exit\n");
}

@@ -495,7 +496,7 @@ static enum dma_status sa11x0_dma_tx_status(struct dma_chan *chan,
/*
* Move pending txds to the issued list, and re-init pending list.
* If not already pending, add this channel to the list of pending
- * channels and trigger the tasklet to run.
+ * channels and trigger the work to run.
*/
static void sa11x0_dma_issue_pending(struct dma_chan *chan)
{
@@ -509,7 +510,7 @@ static void sa11x0_dma_issue_pending(struct dma_chan *chan)
spin_lock(&d->lock);
if (list_empty(&c->node)) {
list_add_tail(&c->node, &d->chan_pending);
- tasklet_schedule(&d->task);
+ queue_work(system_bh_wq, &d->work);
dev_dbg(d->slave.dev, "vchan %p: issued\n", &c->vc);
}
spin_unlock(&d->lock);
@@ -784,7 +785,7 @@ static int sa11x0_dma_device_terminate_all(struct dma_chan *chan)
spin_lock(&d->lock);
p->vchan = NULL;
spin_unlock(&d->lock);
- tasklet_schedule(&d->task);
+ queue_work(system_bh_wq, &d->work);
}
spin_unlock_irqrestore(&c->vc.lock, flags);
vchan_dma_desc_free_list(&c->vc, &head);
@@ -893,7 +894,7 @@ static void sa11x0_dma_free_channels(struct dma_device *dmadev)

list_for_each_entry_safe(c, cn, &dmadev->channels, vc.chan.device_node) {
list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.work);
kfree(c);
}
}
@@ -928,7 +929,7 @@ static int sa11x0_dma_probe(struct platform_device *pdev)
goto err_ioremap;
}

- tasklet_setup(&d->task, sa11x0_dma_tasklet);
+ INIT_WORK(&d->work, sa11x0_dma_work);

for (i = 0; i < NR_PHY_CHAN; i++) {
struct sa11x0_dma_phy *p = &d->phy[i];
@@ -976,7 +977,7 @@ static int sa11x0_dma_probe(struct platform_device *pdev)
for (i = 0; i < NR_PHY_CHAN; i++)
sa11x0_dma_free_irq(pdev, i, &d->phy[i]);
err_irq:
- tasklet_kill(&d->task);
+ cancel_work_sync(&d->work);
iounmap(d->base);
err_ioremap:
kfree(d);
@@ -994,7 +995,7 @@ static void sa11x0_dma_remove(struct platform_device *pdev)
sa11x0_dma_free_channels(&d->slave);
for (pch = 0; pch < NR_PHY_CHAN; pch++)
sa11x0_dma_free_irq(pdev, pch, &d->phy[pch]);
- tasklet_kill(&d->task);
+ cancel_work_sync(&d->work);
iounmap(d->base);
kfree(d);
}
diff --git a/drivers/dma/sf-pdma/sf-pdma.c b/drivers/dma/sf-pdma/sf-pdma.c
index 428473611115..eb865f326f1c 100644
--- a/drivers/dma/sf-pdma/sf-pdma.c
+++ b/drivers/dma/sf-pdma/sf-pdma.c
@@ -22,6 +22,7 @@
#include <linux/of.h>
#include <linux/of_dma.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>

#include "sf-pdma.h"

@@ -295,9 +296,9 @@ static void sf_pdma_free_desc(struct virt_dma_desc *vdesc)
kfree(desc);
}

-static void sf_pdma_donebh_tasklet(struct tasklet_struct *t)
+static void sf_pdma_donebh_work(struct work_struct *t)
{
- struct sf_pdma_chan *chan = from_tasklet(chan, t, done_tasklet);
+ struct sf_pdma_chan *chan = from_work(chan, t, done_work);
unsigned long flags;

spin_lock_irqsave(&chan->lock, flags);
@@ -319,9 +320,9 @@ static void sf_pdma_donebh_tasklet(struct tasklet_struct *t)
spin_unlock_irqrestore(&chan->vchan.lock, flags);
}

-static void sf_pdma_errbh_tasklet(struct tasklet_struct *t)
+static void sf_pdma_errbh_work(struct work_struct *t)
{
- struct sf_pdma_chan *chan = from_tasklet(chan, t, err_tasklet);
+ struct sf_pdma_chan *chan = from_work(chan, t, err_work);
struct sf_pdma_desc *desc = chan->desc;
unsigned long flags;

@@ -352,7 +353,7 @@ static irqreturn_t sf_pdma_done_isr(int irq, void *dev_id)
residue = readq(regs->residue);

if (!residue) {
- tasklet_hi_schedule(&chan->done_tasklet);
+ queue_work(system_bh_highpri_wq, &chan->done_work);
} else {
/* submit next trascatioin if possible */
struct sf_pdma_desc *desc = chan->desc;
@@ -378,7 +379,7 @@ static irqreturn_t sf_pdma_err_isr(int irq, void *dev_id)
writel((readl(regs->ctrl)) & ~PDMA_ERR_STATUS_MASK, regs->ctrl);
spin_unlock(&chan->lock);

- tasklet_schedule(&chan->err_tasklet);
+ queue_work(system_bh_wq, &chan->err_work);

return IRQ_HANDLED;
}
@@ -488,8 +489,8 @@ static void sf_pdma_setup_chans(struct sf_pdma *pdma)

writel(PDMA_CLEAR_CTRL, chan->regs.ctrl);

- tasklet_setup(&chan->done_tasklet, sf_pdma_donebh_tasklet);
- tasklet_setup(&chan->err_tasklet, sf_pdma_errbh_tasklet);
+ INIT_WORK(&chan->done_work, sf_pdma_donebh_work);
+ INIT_WORK(&chan->err_work, sf_pdma_errbh_work);
}
}

@@ -603,9 +604,9 @@ static void sf_pdma_remove(struct platform_device *pdev)
devm_free_irq(&pdev->dev, ch->txirq, ch);
devm_free_irq(&pdev->dev, ch->errirq, ch);
list_del(&ch->vchan.chan.device_node);
- tasklet_kill(&ch->vchan.task);
- tasklet_kill(&ch->done_tasklet);
- tasklet_kill(&ch->err_tasklet);
+ cancel_work_sync(&ch->vchan.work);
+ cancel_work_sync(&ch->done_work);
+ cancel_work_sync(&ch->err_work);
}

if (pdev->dev.of_node)
diff --git a/drivers/dma/sf-pdma/sf-pdma.h b/drivers/dma/sf-pdma/sf-pdma.h
index 215e07183d7e..87c6dd06800a 100644
--- a/drivers/dma/sf-pdma/sf-pdma.h
+++ b/drivers/dma/sf-pdma/sf-pdma.h
@@ -18,6 +18,7 @@

#include <linux/dmaengine.h>
#include <linux/dma-direction.h>
+#include <linux/workqueue.h>

#include "../dmaengine.h"
#include "../virt-dma.h"
@@ -99,8 +100,8 @@ struct sf_pdma_chan {
u32 attr;
dma_addr_t dma_dev_addr;
u32 dma_dev_size;
- struct tasklet_struct done_tasklet;
- struct tasklet_struct err_tasklet;
+ struct work_struct done_work;
+ struct work_struct err_work;
struct pdma_regs regs;
spinlock_t lock; /* protect chan data */
bool xfer_err;
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 3f54ff37c5e0..fb4b6b31cc22 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -1253,7 +1253,7 @@ static void sprd_dma_remove(struct platform_device *pdev)
list_for_each_entry_safe(c, cn, &sdev->dma_dev.channels,
vc.chan.device_node) {
list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.work);
}

of_dma_controller_free(pdev->dev.of_node);
diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c
index 8880b5e336f8..5892632654e7 100644
--- a/drivers/dma/st_fdma.c
+++ b/drivers/dma/st_fdma.c
@@ -733,7 +733,7 @@ static void st_fdma_free(struct st_fdma_dev *fdev)
for (i = 0; i < fdev->nr_channels; i++) {
fchan = &fdev->chans[i];
list_del(&fchan->vchan.chan.device_node);
- tasklet_kill(&fchan->vchan.task);
+ cancel_work_sync(&fchan->vchan.work);
}
}

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 2c489299148e..c2b33351c1c9 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -23,6 +23,7 @@
#include <linux/of_dma.h>
#include <linux/amba/bus.h>
#include <linux/regulator/consumer.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"
#include "ste_dma40.h"
@@ -456,12 +457,12 @@ struct d40_base;
* @lock: A spinlock to protect this struct.
* @log_num: The logical number, if any of this channel.
* @pending_tx: The number of pending transfers. Used between interrupt handler
- * and tasklet.
+ * and work.
* @busy: Set to true when transfer is ongoing on this channel.
* @phy_chan: Pointer to physical channel which this instance runs on. If this
* point is NULL, then the channel is not allocated.
* @chan: DMA engine handle.
- * @tasklet: Tasklet that gets scheduled from interrupt context to complete a
+ * @work: Work that gets scheduled from interrupt context to complete a
* transfer and call client callback.
* @client: Cliented owned descriptor list.
* @pending_queue: Submitted jobs, to be issued by issue_pending()
@@ -489,7 +490,7 @@ struct d40_chan {
bool busy;
struct d40_phy_res *phy_chan;
struct dma_chan chan;
- struct tasklet_struct tasklet;
+ struct work_struct work;
struct list_head client;
struct list_head pending_queue;
struct list_head active;
@@ -1590,13 +1591,13 @@ static void dma_tc_handle(struct d40_chan *d40c)
}

d40c->pending_tx++;
- tasklet_schedule(&d40c->tasklet);
+ queue_work(system_bh_wq, &d40c->work);

}

-static void dma_tasklet(struct tasklet_struct *t)
+static void dma_work(struct work_struct *t)
{
- struct d40_chan *d40c = from_tasklet(d40c, t, tasklet);
+ struct d40_chan *d40c = from_work(d40c, t, work);
struct d40_desc *d40d;
unsigned long flags;
bool callback_active;
@@ -1644,7 +1645,7 @@ static void dma_tasklet(struct tasklet_struct *t)
d40c->pending_tx--;

if (d40c->pending_tx)
- tasklet_schedule(&d40c->tasklet);
+ queue_work(system_bh_wq, &d40c->work);

spin_unlock_irqrestore(&d40c->lock, flags);

@@ -2825,7 +2826,7 @@ static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma,
INIT_LIST_HEAD(&d40c->client);
INIT_LIST_HEAD(&d40c->prepare_queue);

- tasklet_setup(&d40c->tasklet, dma_tasklet);
+ INIT_WORK(&d40c->work, dma_work);

list_add_tail(&d40c->chan.device_node,
&dma->channels);
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 583bf49031cf..5afe43f92342 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -20,6 +20,7 @@
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/types.h>
+#include <linux/workqueue.h>

#include "virt-dma.h"

@@ -200,8 +201,8 @@ struct sun6i_dma_dev {
int irq;
spinlock_t lock;
struct reset_control *rstc;
- struct tasklet_struct task;
- atomic_t tasklet_shutdown;
+ struct work_struct work;
+ atomic_t work_shutdown;
struct list_head pending;
struct dma_pool *pool;
struct sun6i_pchan *pchans;
@@ -474,9 +475,9 @@ static int sun6i_dma_start_desc(struct sun6i_vchan *vchan)
return 0;
}

-static void sun6i_dma_tasklet(struct tasklet_struct *t)
+static void sun6i_dma_work(struct work_struct *t)
{
- struct sun6i_dma_dev *sdev = from_tasklet(sdev, t, task);
+ struct sun6i_dma_dev *sdev = from_work(sdev, t, work);
struct sun6i_vchan *vchan;
struct sun6i_pchan *pchan;
unsigned int pchan_alloc = 0;
@@ -574,8 +575,8 @@ static irqreturn_t sun6i_dma_interrupt(int irq, void *dev_id)
status = status >> DMA_IRQ_CHAN_WIDTH;
}

- if (!atomic_read(&sdev->tasklet_shutdown))
- tasklet_schedule(&sdev->task);
+ if (!atomic_read(&sdev->work_shutdown))
+ queue_work(system_bh_wq, &sdev->work);
ret = IRQ_HANDLED;
}

@@ -1000,7 +1001,7 @@ static void sun6i_dma_issue_pending(struct dma_chan *chan)

if (!vchan->phy && list_empty(&vchan->node)) {
list_add_tail(&vchan->node, &sdev->pending);
- tasklet_schedule(&sdev->task);
+ queue_work(system_bh_wq, &sdev->work);
dev_dbg(chan2dev(chan), "vchan %p: issued\n",
&vchan->vc);
}
@@ -1048,20 +1049,20 @@ static struct dma_chan *sun6i_dma_of_xlate(struct of_phandle_args *dma_spec,
return chan;
}

-static inline void sun6i_kill_tasklet(struct sun6i_dma_dev *sdev)
+static inline void sun6i_kill_work(struct sun6i_dma_dev *sdev)
{
/* Disable all interrupts from DMA */
writel(0, sdev->base + DMA_IRQ_EN(0));
writel(0, sdev->base + DMA_IRQ_EN(1));

- /* Prevent spurious interrupts from scheduling the tasklet */
- atomic_inc(&sdev->tasklet_shutdown);
+ /* Prevent spurious interrupts from scheduling the work */
+ atomic_inc(&sdev->work_shutdown);

/* Make sure we won't have any further interrupts */
devm_free_irq(sdev->slave.dev, sdev->irq, sdev);

- /* Actually prevent the tasklet from being scheduled */
- tasklet_kill(&sdev->task);
+ /* Actually prevent the work from being scheduled */
+ cancel_work_sync(&sdev->work);
}

static inline void sun6i_dma_free(struct sun6i_dma_dev *sdev)
@@ -1072,7 +1073,7 @@ static inline void sun6i_dma_free(struct sun6i_dma_dev *sdev)
struct sun6i_vchan *vchan = &sdev->vchans[i];

list_del(&vchan->vc.chan.device_node);
- tasklet_kill(&vchan->vc.task);
+ cancel_work_sync(&vchan->vc.work);
}
}

@@ -1393,7 +1394,7 @@ static int sun6i_dma_probe(struct platform_device *pdev)
if (!sdc->vchans)
return -ENOMEM;

- tasklet_setup(&sdc->task, sun6i_dma_tasklet);
+ INIT_WORK(&sdc->work, sun6i_dma_work);

for (i = 0; i < sdc->num_pchans; i++) {
struct sun6i_pchan *pchan = &sdc->pchans[i];
@@ -1458,7 +1459,7 @@ static int sun6i_dma_probe(struct platform_device *pdev)
err_dma_unregister:
dma_async_device_unregister(&sdc->slave);
err_irq_disable:
- sun6i_kill_tasklet(sdc);
+ sun6i_kill_work(sdc);
err_mbus_clk_disable:
clk_disable_unprepare(sdc->clk_mbus);
err_clk_disable:
@@ -1477,7 +1478,7 @@ static void sun6i_dma_remove(struct platform_device *pdev)
of_dma_controller_free(pdev->dev.of_node);
dma_async_device_unregister(&sdc->slave);

- sun6i_kill_tasklet(sdc);
+ sun6i_kill_work(sdc);

clk_disable_unprepare(sdc->clk_mbus);
clk_disable_unprepare(sdc->clk);
diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c
index 88547a23825b..5078cb410401 100644
--- a/drivers/dma/tegra186-gpc-dma.c
+++ b/drivers/dma/tegra186-gpc-dma.c
@@ -1266,7 +1266,7 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
tegra_dma_terminate_all(dc);
synchronize_irq(tdc->irq);

- tasklet_kill(&tdc->vc.task);
+ cancel_work_sync(&tdc->vc.work);
tdc->config_init = false;
tdc->slave_id = -1;
tdc->sid_dir = DMA_TRANS_NONE;
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index ac69778827f2..51c462840d47 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -24,6 +24,7 @@
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/wait.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -194,9 +195,9 @@ struct tegra_dma_channel {
struct list_head free_dma_desc;
struct list_head cb_desc;

- /* ISR handler and tasklet for bottom half of isr handling */
+ /* ISR handler and work for bottom half of isr handling */
dma_isr_handler isr_handler;
- struct tasklet_struct tasklet;
+ struct work_struct work;

/* Channel-slave specific configuration */
unsigned int slave_id;
@@ -632,9 +633,9 @@ static void handle_cont_sngl_cycle_dma_done(struct tegra_dma_channel *tdc,
}
}

-static void tegra_dma_tasklet(struct tasklet_struct *t)
+static void tegra_dma_work(struct work_struct *t)
{
- struct tegra_dma_channel *tdc = from_tasklet(tdc, t, tasklet);
+ struct tegra_dma_channel *tdc = from_work(tdc, t, work);
struct dmaengine_desc_callback cb;
struct tegra_dma_desc *dma_desc;
unsigned int cb_count;
@@ -670,7 +671,7 @@ static irqreturn_t tegra_dma_isr(int irq, void *dev_id)
if (status & TEGRA_APBDMA_STATUS_ISE_EOC) {
tdc_write(tdc, TEGRA_APBDMA_CHAN_STATUS, status);
tdc->isr_handler(tdc, false);
- tasklet_schedule(&tdc->tasklet);
+ queue_work(system_bh_wq, &tdc->work);
wake_up_all(&tdc->wq);
spin_unlock(&tdc->lock);
return IRQ_HANDLED;
@@ -819,7 +820,7 @@ static void tegra_dma_synchronize(struct dma_chan *dc)
*/
wait_event(tdc->wq, tegra_dma_eoc_interrupt_deasserted(tdc));

- tasklet_kill(&tdc->tasklet);
+ cancel_work_sync(&tdc->work);

pm_runtime_put(tdc->tdma->dev);
}
@@ -1317,7 +1318,7 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
dev_dbg(tdc2dev(tdc), "Freeing channel %d\n", tdc->id);

tegra_dma_terminate_all(dc);
- tasklet_kill(&tdc->tasklet);
+ cancel_work_sync(&tdc->work);

list_splice_init(&tdc->pending_sg_req, &sg_req_list);
list_splice_init(&tdc->free_sg_req, &sg_req_list);
@@ -1511,7 +1512,7 @@ static int tegra_dma_probe(struct platform_device *pdev)
tdc->id = i;
tdc->slave_id = TEGRA_APBDMA_SLAVE_ID_INVALID;

- tasklet_setup(&tdc->tasklet, tegra_dma_tasklet);
+ INIT_WORK(&tdc->work, tegra_dma_work);
spin_lock_init(&tdc->lock);
init_waitqueue_head(&tdc->wq);

@@ -1617,7 +1618,7 @@ static int __maybe_unused tegra_dma_dev_suspend(struct device *dev)
for (i = 0; i < tdma->chip_data->nr_channels; i++) {
struct tegra_dma_channel *tdc = &tdma->channels[i];

- tasklet_kill(&tdc->tasklet);
+ cancel_work_sync(&tdc->work);

spin_lock_irqsave(&tdc->lock, flags);
busy = tdc->busy;
diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index 24ad7077c53b..36d6bb3e9e1d 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -693,7 +693,7 @@ static void tegra_adma_free_chan_resources(struct dma_chan *dc)

tegra_adma_terminate_all(dc);
vchan_free_chan_resources(&tdc->vc);
- tasklet_kill(&tdc->vc.task);
+ cancel_work_sync(&tdc->vc.work);
free_irq(tdc->irq, tdc);
pm_runtime_put(tdc2dev(tdc));

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index 5f8d2e93ff3f..c9f78b462a70 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -2556,7 +2556,7 @@ static void edma_cleanupp_vchan(struct dma_device *dmadev)
list_for_each_entry_safe(echan, _echan,
&dmadev->channels, vchan.chan.device_node) {
list_del(&echan->vchan.chan.device_node);
- tasklet_kill(&echan->vchan.task);
+ cancel_work_sync(&echan->vchan.work);
}
}

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 6400d06588a2..ab5780efb4db 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -28,6 +28,7 @@
#include <linux/soc/ti/ti_sci_inta_msi.h>
#include <linux/dma/k3-event-router.h>
#include <linux/dma/ti-cppi5.h>
+#include <linux/workqueue.h>

#include "../virt-dma.h"
#include "k3-udma.h"
@@ -4003,12 +4004,12 @@ static void udma_desc_pre_callback(struct virt_dma_chan *vc,
}

/*
- * This tasklet handles the completion of a DMA descriptor by
+ * This work handles the completion of a DMA descriptor by
* calling its callback and freeing it.
*/
-static void udma_vchan_complete(struct tasklet_struct *t)
+static void udma_vchan_complete(struct work_struct *t)
{
- struct virt_dma_chan *vc = from_tasklet(vc, t, task);
+ struct virt_dma_chan *vc = from_work(vc, t, work);
struct virt_dma_desc *vd, *_vd;
struct dmaengine_desc_callback cb;
LIST_HEAD(head);
@@ -4073,7 +4074,7 @@ static void udma_free_chan_resources(struct dma_chan *chan)
}

vchan_free_chan_resources(&uc->vc);
- tasklet_kill(&uc->vc.task);
+ cancel_work_sync(&uc->vc.work);

bcdma_free_bchan_resources(uc);
udma_free_tx_resources(uc);
@@ -5534,7 +5535,7 @@ static int udma_probe(struct platform_device *pdev)

vchan_init(&uc->vc, &ud->ddev);
/* Use custom vchan completion handling */
- tasklet_setup(&uc->vc.task, udma_vchan_complete);
+ INIT_WORK(&uc->vc.work, udma_vchan_complete);
init_completion(&uc->teardown_completed);
INIT_DELAYED_WORK(&uc->tx_drain.work, udma_check_tx_completion);
}
diff --git a/drivers/dma/ti/omap-dma.c b/drivers/dma/ti/omap-dma.c
index b9e0e22383b7..7b0c4f571a94 100644
--- a/drivers/dma/ti/omap-dma.c
+++ b/drivers/dma/ti/omap-dma.c
@@ -1521,7 +1521,7 @@ static void omap_dma_free(struct omap_dmadev *od)
struct omap_chan, vc.chan.device_node);

list_del(&c->vc.chan.device_node);
- tasklet_kill(&c->vc.task);
+ cancel_work_sync(&c->vc.work);
kfree(c);
}
}
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index 7410025605e0..c74f38a634ae 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -18,6 +18,7 @@
#include <linux/slab.h>

#include <linux/timb_dma.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -72,7 +73,7 @@ struct timb_dma_chan {
void __iomem *membase;
spinlock_t lock; /* Used to protect data structures,
especially the lists and descriptors,
- from races between the tasklet and calls
+ from races between the work and calls
from above */
bool ongoing;
struct list_head active_list;
@@ -87,7 +88,7 @@ struct timb_dma_chan {
struct timb_dma {
struct dma_device dma;
void __iomem *membase;
- struct tasklet_struct tasklet;
+ struct work_struct work;
struct timb_dma_chan channels[];
};

@@ -563,9 +564,9 @@ static int td_terminate_all(struct dma_chan *chan)
return 0;
}

-static void td_tasklet(struct tasklet_struct *t)
+static void td_work(struct work_struct *t)
{
- struct timb_dma *td = from_tasklet(td, t, tasklet);
+ struct timb_dma *td = from_work(td, t, work);
u32 isr;
u32 ipr;
u32 ier;
@@ -598,10 +599,10 @@ static irqreturn_t td_irq(int irq, void *devid)
u32 ipr = ioread32(td->membase + TIMBDMA_IPR);

if (ipr) {
- /* disable interrupts, will be re-enabled in tasklet */
+ /* disable interrupts, will be re-enabled in work */
iowrite32(0, td->membase + TIMBDMA_IER);

- tasklet_schedule(&td->tasklet);
+ queue_work(system_bh_wq, &td->work);

return IRQ_HANDLED;
} else
@@ -658,12 +659,12 @@ static int td_probe(struct platform_device *pdev)
iowrite32(0x0, td->membase + TIMBDMA_IER);
iowrite32(0xFFFFFFFF, td->membase + TIMBDMA_ISR);

- tasklet_setup(&td->tasklet, td_tasklet);
+ INIT_WORK(&td->work, td_work);

err = request_irq(irq, td_irq, IRQF_SHARED, DRIVER_NAME, td);
if (err) {
dev_err(&pdev->dev, "Failed to request IRQ\n");
- goto err_tasklet_kill;
+ goto err_work_kill;
}

td->dma.device_alloc_chan_resources = td_alloc_chan_resources;
@@ -728,8 +729,8 @@ static int td_probe(struct platform_device *pdev)

err_free_irq:
free_irq(irq, td);
-err_tasklet_kill:
- tasklet_kill(&td->tasklet);
+err_work_kill:
+ cancel_work_sync(&td->work);
iounmap(td->membase);
err_free_mem:
kfree(td);
@@ -748,7 +749,7 @@ static void td_remove(struct platform_device *pdev)

dma_async_device_unregister(&td->dma);
free_irq(irq, td);
- tasklet_kill(&td->tasklet);
+ cancel_work_sync(&td->work);
iounmap(td->membase);
kfree(td);
release_mem_region(iomem->start, resource_size(iomem));
diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index 44ba377b4b5a..04916859a7fb 100644
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -12,6 +12,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/scatterlist.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"
#include "txx9dmac.h"
@@ -340,7 +341,7 @@ static void txx9dmac_dostart(struct txx9dmac_chan *dc,
dev_err(chan2dev(&dc->chan),
"BUG: Attempted to start non-idle channel\n");
txx9dmac_dump_regs(dc);
- /* The tasklet will hopefully advance the queue... */
+ /* The work will hopefully advance the queue... */
return;
}

@@ -601,15 +602,15 @@ static void txx9dmac_scan_descriptors(struct txx9dmac_chan *dc)
}
}

-static void txx9dmac_chan_tasklet(struct tasklet_struct *t)
+static void txx9dmac_chan_work(struct work_struct *t)
{
int irq;
u32 csr;
struct txx9dmac_chan *dc;

- dc = from_tasklet(dc, t, tasklet);
+ dc = from_work(dc, t, work);
csr = channel_readl(dc, CSR);
- dev_vdbg(chan2dev(&dc->chan), "tasklet: status=%x\n", csr);
+ dev_vdbg(chan2dev(&dc->chan), "work: status=%x\n", csr);

spin_lock(&dc->lock);
if (csr & (TXX9_DMA_CSR_ABCHC | TXX9_DMA_CSR_NCHNC |
@@ -628,7 +629,7 @@ static irqreturn_t txx9dmac_chan_interrupt(int irq, void *dev_id)
dev_vdbg(chan2dev(&dc->chan), "interrupt: status=%#x\n",
channel_readl(dc, CSR));

- tasklet_schedule(&dc->tasklet);
+ queue_work(system_bh_wq, &dc->work);
/*
* Just disable the interrupts. We'll turn them back on in the
* softirq handler.
@@ -638,23 +639,23 @@ static irqreturn_t txx9dmac_chan_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static void txx9dmac_tasklet(struct tasklet_struct *t)
+static void txx9dmac_work(struct work_struct *t)
{
int irq;
u32 csr;
struct txx9dmac_chan *dc;

- struct txx9dmac_dev *ddev = from_tasklet(ddev, t, tasklet);
+ struct txx9dmac_dev *ddev = from_work(ddev, t, work);
u32 mcr;
int i;

mcr = dma_readl(ddev, MCR);
- dev_vdbg(ddev->chan[0]->dma.dev, "tasklet: mcr=%x\n", mcr);
+ dev_vdbg(ddev->chan[0]->dma.dev, "work: mcr=%x\n", mcr);
for (i = 0; i < TXX9_DMA_MAX_NR_CHANNELS; i++) {
if ((mcr >> (24 + i)) & 0x11) {
dc = ddev->chan[i];
csr = channel_readl(dc, CSR);
- dev_vdbg(chan2dev(&dc->chan), "tasklet: status=%x\n",
+ dev_vdbg(chan2dev(&dc->chan), "work: status=%x\n",
csr);
spin_lock(&dc->lock);
if (csr & (TXX9_DMA_CSR_ABCHC | TXX9_DMA_CSR_NCHNC |
@@ -675,7 +676,7 @@ static irqreturn_t txx9dmac_interrupt(int irq, void *dev_id)
dev_vdbg(ddev->chan[0]->dma.dev, "interrupt: status=%#x\n",
dma_readl(ddev, MCR));

- tasklet_schedule(&ddev->tasklet);
+ queue_work(system_bh_wq, &ddev->work);
/*
* Just disable the interrupts. We'll turn them back on in the
* softirq handler.
@@ -1113,7 +1114,7 @@ static int __init txx9dmac_chan_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
- tasklet_setup(&dc->tasklet, txx9dmac_chan_tasklet);
+ INIT_WORK(&dc->work, txx9dmac_chan_work);
dc->irq = irq;
err = devm_request_irq(&pdev->dev, dc->irq,
txx9dmac_chan_interrupt, 0, dev_name(&pdev->dev), dc);
@@ -1159,7 +1160,7 @@ static void txx9dmac_chan_remove(struct platform_device *pdev)
dma_async_device_unregister(&dc->dma);
if (dc->irq >= 0) {
devm_free_irq(&pdev->dev, dc->irq, dc);
- tasklet_kill(&dc->tasklet);
+ cancel_work_sync(&dc->work);
}
dc->ddev->chan[pdev->id % TXX9_DMA_MAX_NR_CHANNELS] = NULL;
}
@@ -1198,7 +1199,7 @@ static int __init txx9dmac_probe(struct platform_device *pdev)

ddev->irq = platform_get_irq(pdev, 0);
if (ddev->irq >= 0) {
- tasklet_setup(&ddev->tasklet, txx9dmac_tasklet);
+ INIT_WORK(&ddev->work, txx9dmac_work);
err = devm_request_irq(&pdev->dev, ddev->irq,
txx9dmac_interrupt, 0, dev_name(&pdev->dev), ddev);
if (err)
@@ -1221,7 +1222,7 @@ static void txx9dmac_remove(struct platform_device *pdev)
txx9dmac_off(ddev);
if (ddev->irq >= 0) {
devm_free_irq(&pdev->dev, ddev->irq, ddev);
- tasklet_kill(&ddev->tasklet);
+ cancel_work_sync(&ddev->work);
}
}

diff --git a/drivers/dma/txx9dmac.h b/drivers/dma/txx9dmac.h
index aa53eafb1519..e72457b0a509 100644
--- a/drivers/dma/txx9dmac.h
+++ b/drivers/dma/txx9dmac.h
@@ -8,6 +8,7 @@
#define TXX9DMAC_H

#include <linux/dmaengine.h>
+#include <linux/workqueue.h>
#include <asm/txx9/dmac.h>

/*
@@ -162,7 +163,7 @@ struct txx9dmac_chan {
struct dma_device dma;
struct txx9dmac_dev *ddev;
void __iomem *ch_regs;
- struct tasklet_struct tasklet;
+ struct work_struct work;
int irq;
u32 ccr;

@@ -178,7 +179,7 @@ struct txx9dmac_chan {

struct txx9dmac_dev {
void __iomem *regs;
- struct tasklet_struct tasklet;
+ struct work_struct work;
int irq;
struct txx9dmac_chan *chan[TXX9_DMA_MAX_NR_CHANNELS];
bool have_64bit_regs;
diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c
index a6f4265be0c9..600084be36a7 100644
--- a/drivers/dma/virt-dma.c
+++ b/drivers/dma/virt-dma.c
@@ -8,6 +8,7 @@
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/spinlock.h>
+#include <linux/workqueue.h>

#include "virt-dma.h"

@@ -77,12 +78,12 @@ struct virt_dma_desc *vchan_find_desc(struct virt_dma_chan *vc,
EXPORT_SYMBOL_GPL(vchan_find_desc);

/*
- * This tasklet handles the completion of a DMA descriptor by
+ * This work handles the completion of a DMA descriptor by
* calling its callback and freeing it.
*/
-static void vchan_complete(struct tasklet_struct *t)
+static void vchan_complete(struct work_struct *t)
{
- struct virt_dma_chan *vc = from_tasklet(vc, t, task);
+ struct virt_dma_chan *vc = from_work(vc, t, work);
struct virt_dma_desc *vd, *_vd;
struct dmaengine_desc_callback cb;
LIST_HEAD(head);
@@ -131,7 +132,7 @@ void vchan_init(struct virt_dma_chan *vc, struct dma_device *dmadev)
INIT_LIST_HEAD(&vc->desc_completed);
INIT_LIST_HEAD(&vc->desc_terminated);

- tasklet_setup(&vc->task, vchan_complete);
+ INIT_WORK(&vc->work, vchan_complete);

vc->chan.device = dmadev;
list_add_tail(&vc->chan.device_node, &dmadev->channels);
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
index e9f5250fbe4d..5b6e01508177 100644
--- a/drivers/dma/virt-dma.h
+++ b/drivers/dma/virt-dma.h
@@ -9,6 +9,7 @@

#include <linux/dmaengine.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -21,7 +22,7 @@ struct virt_dma_desc {

struct virt_dma_chan {
struct dma_chan chan;
- struct tasklet_struct task;
+ struct work_struct work;
void (*desc_free)(struct virt_dma_desc *);

spinlock_t lock;
@@ -102,7 +103,7 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd)
vd, cookie);
list_add_tail(&vd->node, &vc->desc_completed);

- tasklet_schedule(&vc->task);
+ queue_work(system_bh_wq, &vc->work);
}

/**
@@ -133,7 +134,7 @@ static inline void vchan_cyclic_callback(struct virt_dma_desc *vd)
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);

vc->cyclic = vd;
- tasklet_schedule(&vc->task);
+ queue_work(system_bh_wq, &vc->work);
}

/**
@@ -213,7 +214,7 @@ static inline void vchan_synchronize(struct virt_dma_chan *vc)
LIST_HEAD(head);
unsigned long flags;

- tasklet_kill(&vc->task);
+ cancel_work_sync(&vc->work);

spin_lock_irqsave(&vc->lock, flags);

diff --git a/drivers/dma/xgene-dma.c b/drivers/dma/xgene-dma.c
index fd4397adeb79..c7b7fc0c7fcc 100644
--- a/drivers/dma/xgene-dma.c
+++ b/drivers/dma/xgene-dma.c
@@ -21,6 +21,7 @@
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/workqueue.h>

#include "dmaengine.h"

@@ -261,7 +262,7 @@ struct xgene_dma_desc_sw {
* These descriptors have already had their cleanup actions run. They
* are waiting for the ACK bit to be set by the async tx API.
* @desc_pool: descriptor pool for DMA operations
- * @tasklet: bottom half where all completed descriptors cleans
+ * @work: bottom half where all completed descriptors cleans
* @tx_ring: transmit ring descriptor that we use to prepare actual
* descriptors for further executions
* @rx_ring: receive ring descriptor that we use to get completed DMA
@@ -281,7 +282,7 @@ struct xgene_dma_chan {
struct list_head ld_running;
struct list_head ld_completed;
struct dma_pool *desc_pool;
- struct tasklet_struct tasklet;
+ struct work_struct work;
struct xgene_dma_ring tx_ring;
struct xgene_dma_ring rx_ring;
};
@@ -976,9 +977,9 @@ static enum dma_status xgene_dma_tx_status(struct dma_chan *dchan,
return dma_cookie_status(dchan, cookie, txstate);
}

-static void xgene_dma_tasklet_cb(struct tasklet_struct *t)
+static void xgene_dma_work_cb(struct work_struct *t)
{
- struct xgene_dma_chan *chan = from_tasklet(chan, t, tasklet);
+ struct xgene_dma_chan *chan = from_work(chan, t, work);

/* Run all cleanup for descriptors which have been completed */
xgene_dma_cleanup_descriptors(chan);
@@ -1000,11 +1001,11 @@ static irqreturn_t xgene_dma_chan_ring_isr(int irq, void *id)
disable_irq_nosync(chan->rx_irq);

/*
- * Schedule the tasklet to handle all cleanup of the current
+ * Schedule the work to handle all cleanup of the current
* transaction. It will start a new transaction if there is
* one pending.
*/
- tasklet_schedule(&chan->tasklet);
+ queue_work(system_bh_wq, &chan->work);

return IRQ_HANDLED;
}
@@ -1540,7 +1541,7 @@ static int xgene_dma_async_register(struct xgene_dma *pdma, int id)
INIT_LIST_HEAD(&chan->ld_pending);
INIT_LIST_HEAD(&chan->ld_running);
INIT_LIST_HEAD(&chan->ld_completed);
- tasklet_setup(&chan->tasklet, xgene_dma_tasklet_cb);
+ INIT_WORK(&chan->work, xgene_dma_work_cb);

chan->pending = 0;
chan->desc_pool = NULL;
@@ -1557,7 +1558,7 @@ static int xgene_dma_async_register(struct xgene_dma *pdma, int id)
ret = dma_async_device_register(dma_dev);
if (ret) {
chan_err(chan, "Failed to register async device %d", ret);
- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);

return ret;
}
@@ -1580,7 +1581,7 @@ static int xgene_dma_init_async(struct xgene_dma *pdma)
if (ret) {
for (j = 0; j < i; j++) {
dma_async_device_unregister(&pdma->dma_dev[j]);
- tasklet_kill(&pdma->chan[j].tasklet);
+ cancel_work_sync(&pdma->chan[j].work);
}

return ret;
@@ -1791,7 +1792,7 @@ static void xgene_dma_remove(struct platform_device *pdev)

for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) {
chan = &pdma->chan[i];
- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);
xgene_dma_delete_chan_rings(chan);
}

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 5eb51ae93e89..d3192eedbee6 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -48,6 +48,7 @@
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/workqueue.h>

#include "../dmaengine.h"

@@ -400,7 +401,7 @@ struct xilinx_dma_tx_descriptor {
* @err: Channel has errors
* @idle: Check for channel idle
* @terminating: Check for channel being synchronized by user
- * @tasklet: Cleanup work after irq
+ * @work: Cleanup work after irq
* @config: Device configuration info
* @flush_on_fsync: Flush on Frame sync
* @desc_pendingcount: Descriptor pending count
@@ -439,7 +440,7 @@ struct xilinx_dma_chan {
bool err;
bool idle;
bool terminating;
- struct tasklet_struct tasklet;
+ struct work_struct work;
struct xilinx_vdma_config config;
bool flush_on_fsync;
u32 desc_pendingcount;
@@ -1094,12 +1095,12 @@ static void xilinx_dma_chan_desc_cleanup(struct xilinx_dma_chan *chan)
}

/**
- * xilinx_dma_do_tasklet - Schedule completion tasklet
+ * xilinx_dma_do_work - Schedule completion work
* @t: Pointer to the Xilinx DMA channel structure
*/
-static void xilinx_dma_do_tasklet(struct tasklet_struct *t)
+static void xilinx_dma_do_work(struct work_struct *t)
{
- struct xilinx_dma_chan *chan = from_tasklet(chan, t, tasklet);
+ struct xilinx_dma_chan *chan = from_work(chan, t, work);

xilinx_dma_chan_desc_cleanup(chan);
}
@@ -1859,7 +1860,7 @@ static irqreturn_t xilinx_mcdma_irq_handler(int irq, void *data)
spin_unlock(&chan->lock);
}

- tasklet_hi_schedule(&chan->tasklet);
+ queue_work(system_bh_highpri_wq, &chan->work);
return IRQ_HANDLED;
}

@@ -1916,7 +1917,7 @@ static irqreturn_t xilinx_dma_irq_handler(int irq, void *data)
spin_unlock(&chan->lock);
}

- tasklet_schedule(&chan->tasklet);
+ queue_work(system_bh_wq, &chan->work);
return IRQ_HANDLED;
}

@@ -2522,7 +2523,7 @@ static void xilinx_dma_synchronize(struct dma_chan *dchan)
{
struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);

- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);
}

/**
@@ -2613,7 +2614,7 @@ static void xilinx_dma_chan_remove(struct xilinx_dma_chan *chan)
if (chan->irq > 0)
free_irq(chan->irq, chan);

- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);

list_del(&chan->common.device_node);
}
@@ -2941,8 +2942,8 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
chan->has_sg ? "enabled" : "disabled");
}

- /* Initialize the tasklet */
- tasklet_setup(&chan->tasklet, xilinx_dma_do_tasklet);
+ /* Initialize the work */
+ INIT_WORK(&chan->work, xilinx_dma_do_work);

/*
* Initialize the DMA channel and add it to the DMA engine channels
diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_dpdma.c
index b82815e64d24..a099ddffeba0 100644
--- a/drivers/dma/xilinx/xilinx_dpdma.c
+++ b/drivers/dma/xilinx/xilinx_dpdma.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
+#include <linux/workqueue.h>

#include <dt-bindings/dma/xlnx-zynqmp-dpdma.h>

@@ -234,7 +235,7 @@ struct xilinx_dpdma_chan {

spinlock_t lock; /* lock to access struct xilinx_dpdma_chan */
struct dma_pool *desc_pool;
- struct tasklet_struct err_task;
+ struct work_struct err_task;

struct {
struct xilinx_dpdma_tx_desc *pending;
@@ -1396,7 +1397,7 @@ static void xilinx_dpdma_synchronize(struct dma_chan *dchan)
}

/* -----------------------------------------------------------------------------
- * Interrupt and Tasklet Handling
+ * Interrupt and Work Handling
*/

/**
@@ -1443,7 +1444,7 @@ static void xilinx_dpdma_handle_err_irq(struct xilinx_dpdma_device *xdev,

for (i = 0; i < ARRAY_SIZE(xdev->chan); i++)
if (err || xilinx_dpdma_chan_err(xdev->chan[i], isr, eisr))
- tasklet_schedule(&xdev->chan[i]->err_task);
+ queue_work(system_bh_wq, &xdev->chan[i]->err_task);
}

/**
@@ -1471,16 +1472,16 @@ static void xilinx_dpdma_disable_irq(struct xilinx_dpdma_device *xdev)
}

/**
- * xilinx_dpdma_chan_err_task - Per channel tasklet for error handling
- * @t: pointer to the tasklet associated with this handler
+ * xilinx_dpdma_chan_err_task - Per channel work for error handling
+ * @t: pointer to the work associated with this handler
*
- * Per channel error handling tasklet. This function waits for the outstanding
+ * Per channel error handling work. This function waits for the outstanding
* transaction to complete and triggers error handling. After error handling,
* re-enable channel error interrupts, and restart the channel if needed.
*/
-static void xilinx_dpdma_chan_err_task(struct tasklet_struct *t)
+static void xilinx_dpdma_chan_err_task(struct work_struct *t)
{
- struct xilinx_dpdma_chan *chan = from_tasklet(chan, t, err_task);
+ struct xilinx_dpdma_chan *chan = from_work(chan, t, err_task);
struct xilinx_dpdma_device *xdev = chan->xdev;
unsigned long flags;

@@ -1569,7 +1570,7 @@ static int xilinx_dpdma_chan_init(struct xilinx_dpdma_device *xdev,
spin_lock_init(&chan->lock);
init_waitqueue_head(&chan->wait_to_stop);

- tasklet_setup(&chan->err_task, xilinx_dpdma_chan_err_task);
+ INIT_WORK(&chan->err_task, xilinx_dpdma_chan_err_task);

chan->vchan.desc_free = xilinx_dpdma_chan_free_tx_desc;
vchan_init(&chan->vchan, &xdev->common);
@@ -1584,7 +1585,7 @@ static void xilinx_dpdma_chan_remove(struct xilinx_dpdma_chan *chan)
if (!chan)
return;

- tasklet_kill(&chan->err_task);
+ cancel_work_sync(&chan->err_task);
list_del(&chan->vchan.chan.device_node);
}

diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c
index f31631bef961..a4b55a45fd3d 100644
--- a/drivers/dma/xilinx/zynqmp_dma.c
+++ b/drivers/dma/xilinx/zynqmp_dma.c
@@ -18,6 +18,7 @@
#include <linux/clk.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>

#include "../dmaengine.h"

@@ -204,7 +205,7 @@ struct zynqmp_dma_desc_sw {
* @dev: The dma device
* @irq: Channel IRQ
* @is_dmacoherent: Tells whether dma operations are coherent or not
- * @tasklet: Cleanup work after irq
+ * @work: Cleanup work after irq
* @idle : Channel status;
* @desc_size: Size of the low level descriptor
* @err: Channel has errors
@@ -228,7 +229,7 @@ struct zynqmp_dma_chan {
struct device *dev;
int irq;
bool is_dmacoherent;
- struct tasklet_struct tasklet;
+ struct work_struct work;
bool idle;
size_t desc_size;
bool err;
@@ -724,7 +725,7 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data)

writel(isr, chan->regs + ZYNQMP_DMA_ISR);
if (status & ZYNQMP_DMA_INT_DONE) {
- tasklet_schedule(&chan->tasklet);
+ queue_work(system_bh_wq, &chan->work);
ret = IRQ_HANDLED;
}

@@ -733,7 +734,7 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data)

if (status & ZYNQMP_DMA_INT_ERR) {
chan->err = true;
- tasklet_schedule(&chan->tasklet);
+ queue_work(system_bh_wq, &chan->work);
dev_err(chan->dev, "Channel %p has errors\n", chan);
ret = IRQ_HANDLED;
}
@@ -748,12 +749,12 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data)
}

/**
- * zynqmp_dma_do_tasklet - Schedule completion tasklet
+ * zynqmp_dma_do_work - Schedule completion work
* @t: Pointer to the ZynqMP DMA channel structure
*/
-static void zynqmp_dma_do_tasklet(struct tasklet_struct *t)
+static void zynqmp_dma_do_work(struct work_struct *t)
{
- struct zynqmp_dma_chan *chan = from_tasklet(chan, t, tasklet);
+ struct zynqmp_dma_chan *chan = from_work(chan, t, work);
u32 count;
unsigned long irqflags;

@@ -804,7 +805,7 @@ static void zynqmp_dma_synchronize(struct dma_chan *dchan)
{
struct zynqmp_dma_chan *chan = to_chan(dchan);

- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);
}

/**
@@ -876,7 +877,7 @@ static void zynqmp_dma_chan_remove(struct zynqmp_dma_chan *chan)

if (chan->irq)
devm_free_irq(chan->zdev->dev, chan->irq, chan);
- tasklet_kill(&chan->tasklet);
+ cancel_work_sync(&chan->work);
list_del(&chan->common.device_node);
}

@@ -921,7 +922,7 @@ static int zynqmp_dma_chan_probe(struct zynqmp_dma_device *zdev,

chan->is_dmacoherent = of_property_read_bool(node, "dma-coherent");
zdev->chan = chan;
- tasklet_setup(&chan->tasklet, zynqmp_dma_do_tasklet);
+ INIT_WORK(&chan->work, zynqmp_dma_do_work);
spin_lock_init(&chan->lock);
INIT_LIST_HEAD(&chan->active_list);
INIT_LIST_HEAD(&chan->pending_list);
--
2.17.1