[PATCH v2] mmc: Convert from tasklet to BH workqueue

Allen Pais
2024-06-12T23:49:54Z

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/mmc/* from tasklet to BH workqueue.

Based on the work done by Tejun Heo <tj@kernel.org>

Tested-by: Christian Loehle <christian.loehle@arm.com>
Tested-by: Aubin Constans <aubin.constans@microchip.com>
Acked-by: Aubin Constans <aubin.constans@microchip.com>
Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
---
v2:
- fixed patch styling issues
- rename work to bh_work

Link to v1:
https://lore.kernel.org/all/20240327160314.9982-10-apais@linux.microsoft.com/

drivers/mmc/host/atmel-mci.c | 35 ++++-----
drivers/mmc/host/au1xmmc.c | 37 +++++-----
drivers/mmc/host/cb710-mmc.c | 14 ++--
drivers/mmc/host/cb710-mmc.h | 3 +-
drivers/mmc/host/dw_mmc.c | 24 +++---
drivers/mmc/host/dw_mmc.h | 9 ++-
drivers/mmc/host/omap.c | 17 +++--
drivers/mmc/host/renesas_sdhi.h | 3 +-
drivers/mmc/host/renesas_sdhi_internal_dmac.c | 24 +++---
drivers/mmc/host/renesas_sdhi_sys_dmac.c | 9 +--
drivers/mmc/host/sdhci-bcm-kona.c | 2 +-
drivers/mmc/host/tifm_sd.c | 15 ++--
drivers/mmc/host/tmio_mmc.h | 3 +-
drivers/mmc/host/tmio_mmc_core.c | 4 +-
drivers/mmc/host/uniphier-sd.c | 12 +--
drivers/mmc/host/via-sdmmc.c | 25 ++++---
drivers/mmc/host/wbsd.c | 74 +++++++++----------
drivers/mmc/host/wbsd.h | 10 +--
18 files changed, 163 insertions(+), 157 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 8199d9620075..6490df54a6f5 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -33,6 +33,7 @@
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/pinctrl/consumer.h>
+#include <linux/workqueue.h>

#include <asm/cacheflush.h>
#include <asm/io.h>
@@ -272,12 +273,12 @@ struct atmel_mci_dma {
* EVENT_DATA_ERROR is pending.
* @stop_cmdr: Value to be loaded into CMDR when the stop command is
* to be sent.
- * @tasklet: Tasklet running the request state machine.
+ * @bh_work: Work running the request state machine.
* @pending_events: Bitmask of events flagged by the interrupt handler
- * to be processed by the tasklet.
+ * to be processed by the work.
* @completed_events: Bitmask of events which the state machine has
* processed.
- * @state: Tasklet state.
+ * @state: Work state.
* @queue: List of slots waiting for access to the controller.
* @need_clock_update: Update the clock rate before the next request.
* @need_reset: Reset controller before next request.
@@ -352,7 +353,7 @@ struct atmel_mci {
u32 data_status;
u32 stop_cmdr;

- struct tasklet_struct tasklet;
+ struct work_struct bh_work;
unsigned long pending_events;
unsigned long completed_events;
enum atmel_mci_state state;
@@ -735,7 +736,7 @@ static void atmci_timeout_timer(struct timer_list *t)
host->need_reset = 1;
host->state = STATE_END_REQUEST;
smp_wmb();
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host,
@@ -958,7 +959,7 @@ static void atmci_pdc_complete(struct atmel_mci *host)

dev_dbg(dev, "(%s) set pending xfer complete\n", __func__);
atmci_set_pending(host, EVENT_XFER_COMPLETE);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

static void atmci_dma_cleanup(struct atmel_mci *host)
@@ -972,7 +973,7 @@ static void atmci_dma_cleanup(struct atmel_mci *host)
}

/*
- * This function is called by the DMA driver from tasklet context.
+ * This function is called by the DMA driver from bh context.
*/
static void atmci_dma_complete(void *arg)
{
@@ -995,7 +996,7 @@ static void atmci_dma_complete(void *arg)
if (data) {
dev_dbg(dev, "(%s) set pending xfer complete\n", __func__);
atmci_set_pending(host, EVENT_XFER_COMPLETE);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);

/*
* Regardless of what the documentation says, we have
@@ -1008,7 +1009,7 @@ static void atmci_dma_complete(void *arg)
* haven't seen all the potential error bits yet.
*
* The interrupt handler will schedule a different
- * tasklet to finish things up when the data transfer
+ * bh work to finish things up when the data transfer
* is completely done.
*
* We may not complete the mmc request here anyway
@@ -1745,9 +1746,9 @@ static void atmci_detect_change(struct timer_list *t)
}
}

-static void atmci_tasklet_func(struct tasklet_struct *t)
+static void atmci_work_func(struct work_struct *t)
{
- struct atmel_mci *host = from_tasklet(host, t, tasklet);
+ struct atmel_mci *host = from_work(host, t, bh_work);
struct mmc_request *mrq = host->mrq;
struct mmc_data *data = host->data;
struct device *dev = host->dev;
@@ -1759,7 +1760,7 @@ static void atmci_tasklet_func(struct tasklet_struct *t)

state = host->state;

- dev_vdbg(dev, "tasklet: state %u pending/completed/mask %lx/%lx/%x\n",
+ dev_vdbg(dev, "bh_work: state %u pending/completed/mask %lx/%lx/%x\n",
state, host->pending_events, host->completed_events,
atmci_readl(host, ATMCI_IMR));

@@ -2118,7 +2119,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id)
dev_dbg(dev, "set pending data error\n");
smp_wmb();
atmci_set_pending(host, EVENT_DATA_ERROR);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

if (pending & ATMCI_TXBUFE) {
@@ -2187,7 +2188,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id)
smp_wmb();
dev_dbg(dev, "set pending notbusy\n");
atmci_set_pending(host, EVENT_NOTBUSY);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

if (pending & ATMCI_NOTBUSY) {
@@ -2196,7 +2197,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id)
smp_wmb();
dev_dbg(dev, "set pending notbusy\n");
atmci_set_pending(host, EVENT_NOTBUSY);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

if (pending & ATMCI_RXRDY)
@@ -2211,7 +2212,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id)
smp_wmb();
dev_dbg(dev, "set pending cmd rdy\n");
atmci_set_pending(host, EVENT_CMD_RDY);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

if (pending & (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB))
@@ -2487,7 +2488,7 @@ static int atmci_probe(struct platform_device *pdev)

host->mapbase = regs->start;

- tasklet_setup(&host->tasklet, atmci_tasklet_func);
+ INIT_WORK(&host->bh_work, atmci_work_func);

ret = request_irq(irq, atmci_interrupt, 0, dev_name(dev), host);
if (ret) {
diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index b5a5c6a2fe8b..6e80bcb668ec 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -42,6 +42,7 @@
#include <linux/leds.h>
#include <linux/mmc/host.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>

#include <asm/io.h>
#include <asm/mach-au1x00/au1000.h>
@@ -113,8 +114,8 @@ struct au1xmmc_host {

int irq;

- struct tasklet_struct finish_task;
- struct tasklet_struct data_task;
+ struct work_struct finish_bh_work;
+ struct work_struct data_bh_work;
struct au1xmmc_platform_data *platdata;
struct platform_device *pdev;
struct resource *ioarea;
@@ -253,9 +254,9 @@ static void au1xmmc_finish_request(struct au1xmmc_host *host)
mmc_request_done(host->mmc, mrq);
}

-static void au1xmmc_tasklet_finish(struct tasklet_struct *t)
+static void au1xmmc_finish_bh_work(struct work_struct *t)
{
- struct au1xmmc_host *host = from_tasklet(host, t, finish_task);
+ struct au1xmmc_host *host = from_work(host, t, finish_bh_work);
au1xmmc_finish_request(host);
}

@@ -363,9 +364,9 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status)
au1xmmc_finish_request(host);
}

-static void au1xmmc_tasklet_data(struct tasklet_struct *t)
+static void au1xmmc_data_bh_work(struct work_struct *t)
{
- struct au1xmmc_host *host = from_tasklet(host, t, data_task);
+ struct au1xmmc_host *host = from_work(host, t, data_bh_work);

u32 status = __raw_readl(HOST_STATUS(host));
au1xmmc_data_complete(host, status);
@@ -425,7 +426,7 @@ static void au1xmmc_send_pio(struct au1xmmc_host *host)
if (host->flags & HOST_F_STOP)
SEND_STOP(host);

- tasklet_schedule(&host->data_task);
+ queue_work(system_bh_wq, &host->data_bh_work);
}
}

@@ -505,7 +506,7 @@ static void au1xmmc_receive_pio(struct au1xmmc_host *host)
if (host->flags & HOST_F_STOP)
SEND_STOP(host);

- tasklet_schedule(&host->data_task);
+ queue_work(system_bh_wq, &host->data_bh_work);
}
}

@@ -561,7 +562,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status)

if (!trans || cmd->error) {
IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF);
- tasklet_schedule(&host->finish_task);
+ queue_work(system_bh_wq, &host->finish_bh_work);
return;
}

@@ -797,7 +798,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id)
IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH);

/* IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); */
- tasklet_schedule(&host->finish_task);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}
#if 0
else if (status & SD_STATUS_DD) {
@@ -806,7 +807,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id)
au1xmmc_receive_pio(host);
else {
au1xmmc_data_complete(host, status);
- /* tasklet_schedule(&host->data_task); */
+ /* queue_work(system_bh_wq, &host->data_bh_work); */
}
}
#endif
@@ -854,7 +855,7 @@ static void au1xmmc_dbdma_callback(int irq, void *dev_id)
if (host->flags & HOST_F_STOP)
SEND_STOP(host);

- tasklet_schedule(&host->data_task);
+ queue_work(system_bh_wq, &host->data_bh_work);
}

static int au1xmmc_dbdma_init(struct au1xmmc_host *host)
@@ -1039,9 +1040,9 @@ static int au1xmmc_probe(struct platform_device *pdev)
if (host->platdata)
mmc->caps &= ~(host->platdata->mask_host_caps);

- tasklet_setup(&host->data_task, au1xmmc_tasklet_data);
+ INIT_WORK(&host->data_bh_work, au1xmmc_data_bh_work);

- tasklet_setup(&host->finish_task, au1xmmc_tasklet_finish);
+ INIT_WORK(&host->finish_bh_work, au1xmmc_finish_bh_work);

if (has_dbdma()) {
ret = au1xmmc_dbdma_init(host);
@@ -1091,8 +1092,8 @@ static int au1xmmc_probe(struct platform_device *pdev)
if (host->flags & HOST_F_DBDMA)
au1xmmc_dbdma_shutdown(host);

- tasklet_kill(&host->data_task);
- tasklet_kill(&host->finish_task);
+ cancel_work_sync(&host->data_bh_work);
+ cancel_work_sync(&host->finish_bh_work);

if (host->platdata && host->platdata->cd_setup &&
!(mmc->caps & MMC_CAP_NEEDS_POLL))
@@ -1135,8 +1136,8 @@ static void au1xmmc_remove(struct platform_device *pdev)
__raw_writel(0, HOST_CONFIG2(host));
wmb(); /* drain writebuffer */

- tasklet_kill(&host->data_task);
- tasklet_kill(&host->finish_task);
+ cancel_work_sync(&host->data_bh_work);
+ cancel_work_sync(&host->finish_bh_work);

if (host->flags & HOST_F_DBDMA)
au1xmmc_dbdma_shutdown(host);
diff --git a/drivers/mmc/host/cb710-mmc.c b/drivers/mmc/host/cb710-mmc.c
index 0aec33b88bef..902f7f20abaa 100644
--- a/drivers/mmc/host/cb710-mmc.c
+++ b/drivers/mmc/host/cb710-mmc.c
@@ -493,7 +493,7 @@ static void cb710_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
if (!cb710_mmc_command(mmc, mrq->cmd) && mrq->stop)
cb710_mmc_command(mmc, mrq->stop);

- tasklet_schedule(&reader->finish_req_tasklet);
+ queue_work(system_bh_wq, &reader->finish_req_bh_work);
}

static int cb710_mmc_powerup(struct cb710_slot *slot)
@@ -646,10 +646,10 @@ static int cb710_mmc_irq_handler(struct cb710_slot *slot)
return 1;
}

-static void cb710_mmc_finish_request_tasklet(struct tasklet_struct *t)
+static void cb710_mmc_finish_request_bh_work(struct work_struct *t)
{
- struct cb710_mmc_reader *reader = from_tasklet(reader, t,
- finish_req_tasklet);
+ struct cb710_mmc_reader *reader = from_work(reader, t,
+ finish_req_bh_work);
struct mmc_request *mrq = reader->mrq;

reader->mrq = NULL;
@@ -718,8 +718,8 @@ static int cb710_mmc_init(struct platform_device *pdev)

reader = mmc_priv(mmc);

- tasklet_setup(&reader->finish_req_tasklet,
- cb710_mmc_finish_request_tasklet);
+ INIT_WORK(&reader->finish_req_bh_work,
+ cb710_mmc_finish_request_bh_work);
spin_lock_init(&reader->irq_lock);
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);

@@ -763,7 +763,7 @@ static void cb710_mmc_exit(struct platform_device *pdev)
cb710_write_port_32(slot, CB710_MMC_CONFIG_PORT, 0);
cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0);

- tasklet_kill(&reader->finish_req_tasklet);
+ cancel_work_sync(&reader->finish_req_bh_work);

mmc_free_host(mmc);
}
diff --git a/drivers/mmc/host/cb710-mmc.h b/drivers/mmc/host/cb710-mmc.h
index 5e053077dbed..59abaccaad10 100644
--- a/drivers/mmc/host/cb710-mmc.h
+++ b/drivers/mmc/host/cb710-mmc.h
@@ -8,10 +8,11 @@
#define LINUX_CB710_MMC_H

#include <linux/cb710.h>
+#include <linux/workqueue.h>

/* per-MMC-reader structure */
struct cb710_mmc_reader {
- struct tasklet_struct finish_req_tasklet;
+ struct work_struct finish_req_bh_work;
struct mmc_request *mrq;
spinlock_t irq_lock;
unsigned char last_power_mode;
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 8e2d676b9239..7195de2cde44 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -493,7 +493,7 @@ static void dw_mci_dmac_complete_dma(void *arg)
*/
if (data) {
set_bit(EVENT_XFER_COMPLETE, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}
}

@@ -1834,7 +1834,7 @@ static enum hrtimer_restart dw_mci_fault_timer(struct hrtimer *t)
if (!host->data_status) {
host->data_status = SDMMC_INT_DCRC;
set_bit(EVENT_DATA_ERROR, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

spin_unlock_irqrestore(&host->irq_lock, flags);
@@ -2056,9 +2056,9 @@ static bool dw_mci_clear_pending_data_complete(struct dw_mci *host)
return true;
}

-static void dw_mci_tasklet_func(struct tasklet_struct *t)
+static void dw_mci_work_func(struct work_struct *t)
{
- struct dw_mci *host = from_tasklet(host, t, tasklet);
+ struct dw_mci *host = from_work(host, t, bh_work);
struct mmc_data *data;
struct mmc_command *cmd;
struct mmc_request *mrq;
@@ -2113,7 +2113,7 @@ static void dw_mci_tasklet_func(struct tasklet_struct *t)
* will waste a bit of time (we already know
* the command was bad), it can't cause any
* errors since it's possible it would have
- * taken place anyway if this tasklet got
+ * taken place anyway if this bh work got
* delayed. Allowing the transfer to take place
* avoids races and keeps things simple.
*/
@@ -2706,7 +2706,7 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status)
smp_wmb(); /* drain writebuffer */

set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);

dw_mci_start_fault_timer(host);
}
@@ -2774,7 +2774,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
set_bit(EVENT_DATA_COMPLETE,
&host->pending_events);

- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);

spin_unlock(&host->irq_lock);
}
@@ -2793,7 +2793,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
dw_mci_read_data_pio(host, true);
}
set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);

spin_unlock(&host->irq_lock);
}
@@ -3098,7 +3098,7 @@ static void dw_mci_cmd11_timer(struct timer_list *t)

host->cmd_status = SDMMC_INT_RTO;
set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
}

static void dw_mci_cto_timer(struct timer_list *t)
@@ -3144,7 +3144,7 @@ static void dw_mci_cto_timer(struct timer_list *t)
*/
host->cmd_status = SDMMC_INT_RTO;
set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
break;
default:
dev_warn(host->dev, "Unexpected command timeout, state %d\n",
@@ -3195,7 +3195,7 @@ static void dw_mci_dto_timer(struct timer_list *t)
host->data_status = SDMMC_INT_DRTO;
set_bit(EVENT_DATA_ERROR, &host->pending_events);
set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
- tasklet_schedule(&host->tasklet);
+ queue_work(system_bh_wq, &host->bh_work);
break;
default:
dev_warn(host->dev, "Unexpected data timeout, state %d\n",
@@ -3435,7 +3435,7 @@ int dw_mci_probe(struct dw_mci *host)
else
host->fifo_reg = host->regs + DATA_240A_OFFSET;

- tasklet_setup(&host->tasklet, dw_mci_tasklet_func);
+ INIT_WORK(&host->bh_work, dw_mci_work_func);
ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt,
host->irq_flags, "dw-mci", host);
if (ret)
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 4ed81f94f7ca..b504f7ae513a 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -17,6 +17,7 @@
#include <linux/fault-inject.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>

enum dw_mci_state {
STATE_IDLE = 0,
@@ -89,12 +90,12 @@ struct dw_mci_dma_slave {
* @stop_cmdr: Value to be loaded into CMDR when the stop command is
* to be sent.
* @dir_status: Direction of current transfer.
- * @tasklet: Tasklet running the request state machine.
+ * @bh_work: Work running the request state machine.
* @pending_events: Bitmask of events flagged by the interrupt handler
- * to be processed by the tasklet.
+ * to be processed by bh work.
* @completed_events: Bitmask of events which the state machine has
* processed.
- * @state: Tasklet state.
+ * @state: BH work state.
* @queue: List of slots waiting for access to the controller.
* @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus
* rate and timeout calculations.
@@ -194,7 +195,7 @@ struct dw_mci {
u32 data_status;
u32 stop_cmdr;
u32 dir_status;
- struct tasklet_struct tasklet;
+ struct work_struct bh_work;
unsigned long pending_events;
unsigned long completed_events;
enum dw_mci_state state;
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index a8ee0df47148..335350a4e99a 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -28,6 +28,7 @@
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <linux/platform_data/mmc-omap.h>
+#include <linux/workqueue.h>

#define OMAP_MMC_REG_CMD 0x00
@@ -105,7 +106,7 @@ struct mmc_omap_slot {
u16 power_mode;
unsigned int fclk_freq;

- struct tasklet_struct cover_tasklet;
+ struct work_struct cover_bh_work;
struct timer_list cover_timer;
unsigned cover_open;

@@ -873,18 +874,18 @@ void omap_mmc_notify_cover_event(struct device *dev, int num, int is_closed)
sysfs_notify(&slot->mmc->class_dev.kobj, NULL, "cover_switch");
}

- tasklet_hi_schedule(&slot->cover_tasklet);
+ queue_work(system_bh_highpri_wq, &slot->cover_bh_work);
}

static void mmc_omap_cover_timer(struct timer_list *t)
{
struct mmc_omap_slot *slot = from_timer(slot, t, cover_timer);
- tasklet_schedule(&slot->cover_tasklet);
+ queue_work(system_bh_wq, &slot->cover_bh_work);
}

-static void mmc_omap_cover_handler(struct tasklet_struct *t)
+static void mmc_omap_cover_bh_handler(struct work_struct *t)
{
- struct mmc_omap_slot *slot = from_tasklet(slot, t, cover_tasklet);
+ struct mmc_omap_slot *slot = from_work(slot, t, cover_bh_work);
int cover_open = mmc_omap_cover_is_open(slot);

mmc_detect_change(slot->mmc, 0);
@@ -1314,7 +1315,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id)

if (slot->pdata->get_cover_state != NULL) {
timer_setup(&slot->cover_timer, mmc_omap_cover_timer, 0);
- tasklet_setup(&slot->cover_tasklet, mmc_omap_cover_handler);
+ INIT_WORK(&slot->cover_bh_work, mmc_omap_cover_bh_handler);
}

r = mmc_add_host(mmc);
@@ -1333,7 +1334,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id)
&dev_attr_cover_switch);
if (r < 0)
goto err_remove_slot_name;
- tasklet_schedule(&slot->cover_tasklet);
+ queue_work(system_bh_wq, &slot->cover_bh_work);
}

return 0;
@@ -1356,7 +1357,7 @@ static void mmc_omap_remove_slot(struct mmc_omap_slot *slot)
if (slot->pdata->get_cover_state != NULL)
device_remove_file(&mmc->class_dev, &dev_attr_cover_switch);

- tasklet_kill(&slot->cover_tasklet);
+ cancel_work_sync(&slot->cover_bh_work);
del_timer_sync(&slot->cover_timer);
flush_workqueue(slot->host->mmc_omap_wq);

diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
index 586f94d4dbfd..4fd2bfcacd76 100644
--- a/drivers/mmc/host/renesas_sdhi.h
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -11,6 +11,7 @@

#include <linux/dmaengine.h>
#include <linux/platform_device.h>
+#include <linux/workqueue.h>
#include "tmio_mmc.h"

struct renesas_sdhi_scc {
@@ -67,7 +68,7 @@ struct renesas_sdhi_dma {
dma_filter_fn filter;
void (*enable)(struct tmio_mmc_host *host, bool enable);
struct completion dma_dataend;
- struct tasklet_struct dma_complete;
+ struct work_struct dma_complete;
};

struct renesas_sdhi {
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index 422fa63a2e99..5fd276492f80 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -337,7 +337,7 @@ static bool renesas_sdhi_internal_dmac_dma_irq(struct tmio_mmc_host *host)
writel(status ^ dma_irqs, host->ctl + DM_CM_INFO1);
set_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags);
if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags))
- tasklet_schedule(&dma_priv->dma_complete);
+ queue_work(system_bh_wq, &dma_priv->dma_complete);
}

return status & dma_irqs;
@@ -352,7 +352,7 @@ renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host)
set_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags);
if (test_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags) ||
host->data->error)
- tasklet_schedule(&dma_priv->dma_complete);
+ queue_work(system_bh_wq, &dma_priv->dma_complete);
}

/*
@@ -440,9 +440,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
renesas_sdhi_internal_dmac_enable_dma(host, false);
}

-static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg)
+static void renesas_sdhi_internal_dmac_issue_work_fn(struct work_struct *t)
{
- struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
+ struct tmio_mmc_host *host = from_work(host, t, dma_issue);
struct renesas_sdhi *priv = host_to_priv(host);

tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND);
@@ -454,7 +454,7 @@ static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg)
/* on CMD errors, simulate DMA end immediately */
set_bit(SDHI_DMA_END_FLAG_DMA, &priv->dma_priv.end_flags);
if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &priv->dma_priv.end_flags))
- tasklet_schedule(&priv->dma_priv.dma_complete);
+ queue_work(system_bh_wq, &priv->dma_priv.dma_complete);
}
}

@@ -484,9 +484,9 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host)
return true;
}

-static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg)
+static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *t)
{
- struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
+ struct tmio_mmc_host *host = from_work(host, t, dma_complete);

spin_lock_irq(&host->lock);
if (!renesas_sdhi_internal_dmac_complete(host))
@@ -544,12 +544,10 @@ renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host,
/* Each value is set to non-zero to assume "enabling" each DMA */
host->chan_rx = host->chan_tx = (void *)0xdeadbeaf;

- tasklet_init(&priv->dma_priv.dma_complete,
- renesas_sdhi_internal_dmac_complete_tasklet_fn,
- (unsigned long)host);
- tasklet_init(&host->dma_issue,
- renesas_sdhi_internal_dmac_issue_tasklet_fn,
- (unsigned long)host);
+ INIT_WORK(&priv->dma_priv.dma_complete,
+ renesas_sdhi_internal_dmac_complete_work_fn);
+ INIT_WORK(&host->dma_issue,
+ renesas_sdhi_internal_dmac_issue_work_fn);

/* Add pre_req and post_req */
host->ops.pre_req = renesas_sdhi_internal_dmac_pre_req;
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index 9cf7f9feab72..793595ad6d02 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -312,9 +312,9 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host,
}
}

-static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv)
+static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *t)
{
- struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
+ struct tmio_mmc_host *host = from_work(host, t, dma_issue);
struct dma_chan *chan = NULL;

spin_lock_irq(&host->lock);
@@ -401,9 +401,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
goto ebouncebuf;

init_completion(&priv->dma_priv.dma_dataend);
- tasklet_init(&host->dma_issue,
- renesas_sdhi_sys_dmac_issue_tasklet_fn,
- (unsigned long)host);
+ INIT_WORK(&host->dma_issue,
+ renesas_sdhi_sys_dmac_issue_work_fn);
}

renesas_sdhi_sys_dmac_enable_dma(host, true);
diff --git a/drivers/mmc/host/sdhci-bcm-kona.c b/drivers/mmc/host/sdhci-bcm-kona.c
index cb9152c6a65d..9c215db81b2b 100644
--- a/drivers/mmc/host/sdhci-bcm-kona.c
+++ b/drivers/mmc/host/sdhci-bcm-kona.c
@@ -107,7 +107,7 @@ static void sdhci_bcm_kona_sd_init(struct sdhci_host *host)
* Software emulation of the SD card insertion/removal. Set insert=1 for insert
* and insert=0 for removal. The card detection is done by GPIO. For Broadcom
* IP to function properly the bit 0 of CORESTAT register needs to be set/reset
- * to generate the CD IRQ handled in sdhci.c which schedules card_tasklet.
+ * to generate the CD IRQ handled in sdhci.c which schedules card_bh_work.
*/
static int sdhci_bcm_kona_sd_card_emulate(struct sdhci_host *host, int insert)
{
diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c
index b5a2f2f25ad9..aea14bf3e2e8 100644
--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -13,6 +13,7 @@
#include <linux/highmem.h>
#include <linux/scatterlist.h>
#include <linux/module.h>
+#include <linux/workqueue.h>
#include <asm/io.h>

#define DRIVER_NAME "tifm_sd"
@@ -97,7 +98,7 @@ struct tifm_sd {
unsigned int clk_div;
unsigned long timeout_jiffies;

- struct tasklet_struct finish_tasklet;
+ struct work_struct finish_bh_work;
struct timer_list timer;
struct mmc_request *req;

@@ -463,7 +464,7 @@ static void tifm_sd_check_status(struct tifm_sd *host)
}
}
finish_request:
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}

/* Called from interrupt handler */
@@ -723,9 +724,9 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
mmc_request_done(mmc, mrq);
}

-static void tifm_sd_end_cmd(struct tasklet_struct *t)
+static void tifm_sd_end_cmd(struct work_struct *t)
{
- struct tifm_sd *host = from_tasklet(host, t, finish_tasklet);
+ struct tifm_sd *host = from_work(host, t, finish_bh_work);
struct tifm_dev *sock = host->dev;
struct mmc_host *mmc = tifm_get_drvdata(sock);
struct mmc_request *mrq;
@@ -960,7 +961,7 @@ static int tifm_sd_probe(struct tifm_dev *sock)
*/
mmc->max_busy_timeout = TIFM_MMCSD_REQ_TIMEOUT_MS;

- tasklet_setup(&host->finish_tasklet, tifm_sd_end_cmd);
+ INIT_WORK(&host->finish_bh_work, tifm_sd_end_cmd);
timer_setup(&host->timer, tifm_sd_abort, 0);

mmc->ops = &tifm_sd_ops;
@@ -999,7 +1000,7 @@ static void tifm_sd_remove(struct tifm_dev *sock)
writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
spin_unlock_irqrestore(&sock->lock, flags);

- tasklet_kill(&host->finish_tasklet);
+ cancel_work_sync(&host->finish_bh_work);

spin_lock_irqsave(&sock->lock, flags);
if (host->req) {
@@ -1009,7 +1010,7 @@ static void tifm_sd_remove(struct tifm_dev *sock)
host->req->cmd->error = -ENOMEDIUM;
if (host->req->stop)
host->req->stop->error = -ENOMEDIUM;
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}
spin_unlock_irqrestore(&sock->lock, flags);
mmc_remove_host(mmc);
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index de56e6534aea..63000d9c7030 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -21,6 +21,7 @@
#include <linux/scatterlist.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>

#define CTL_SD_CMD 0x00
#define CTL_ARG_REG 0x04
@@ -156,7 +157,7 @@ struct tmio_mmc_host {
bool dma_on;
struct dma_chan *chan_rx;
struct dma_chan *chan_tx;
- struct tasklet_struct dma_issue;
+ struct work_struct dma_issue;
struct scatterlist bounce_sg;
u8 *bounce_buf;

diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 93e912afd3ae..51bd2365795b 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat)
} else {
tmio_mmc_disable_mmc_irqs(host,
TMIO_MASK_READOP);
- tasklet_schedule(&host->dma_issue);
+ queue_work(system_bh_wq, &host->dma_issue);
}
} else {
if (!host->dma_on) {
@@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat)
} else {
tmio_mmc_disable_mmc_irqs(host,
TMIO_MASK_WRITEOP);
- tasklet_schedule(&host->dma_issue);
+ queue_work(system_bh_wq, &host->dma_issue);
}
}
} else {
diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c
index 1404989e6151..417fd13efdfd 100644
--- a/drivers/mmc/host/uniphier-sd.c
+++ b/drivers/mmc/host/uniphier-sd.c
@@ -90,9 +90,9 @@ static void uniphier_sd_dma_endisable(struct tmio_mmc_host *host, int enable)
}

/* external DMA engine */
-static void uniphier_sd_external_dma_issue(struct tasklet_struct *t)
+static void uniphier_sd_external_dma_issue(struct work_struct *t)
{
- struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue);
+ struct tmio_mmc_host *host = from_work(host, t, dma_issue);
struct uniphier_sd_priv *priv = uniphier_sd_priv(host);

uniphier_sd_dma_endisable(host, 1);
@@ -199,7 +199,7 @@ static void uniphier_sd_external_dma_request(struct tmio_mmc_host *host,
host->chan_rx = chan;
host->chan_tx = chan;

- tasklet_setup(&host->dma_issue, uniphier_sd_external_dma_issue);
+ INIT_WORK(&host->dma_issue, uniphier_sd_external_dma_issue);
}

static void uniphier_sd_external_dma_release(struct tmio_mmc_host *host)
@@ -236,9 +236,9 @@ static const struct tmio_mmc_dma_ops uniphier_sd_external_dma_ops = {
.dataend = uniphier_sd_external_dma_dataend,
};

-static void uniphier_sd_internal_dma_issue(struct tasklet_struct *t)
+static void uniphier_sd_internal_dma_issue(struct work_struct *t)
{
- struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue);
+ struct tmio_mmc_host *host = from_work(host, t, dma_issue);
unsigned long flags;

spin_lock_irqsave(&host->lock, flags);
@@ -317,7 +317,7 @@ static void uniphier_sd_internal_dma_request(struct tmio_mmc_host *host,

host->chan_tx = (void *)0xdeadbeaf;

- tasklet_setup(&host->dma_issue, uniphier_sd_internal_dma_issue);
+ INIT_WORK(&host->dma_issue, uniphier_sd_internal_dma_issue);
}

static void uniphier_sd_internal_dma_release(struct tmio_mmc_host *host)
diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c
index ba6044b16e07..f77457105ec3 100644
--- a/drivers/mmc/host/via-sdmmc.c
+++ b/drivers/mmc/host/via-sdmmc.c
@@ -12,6 +12,7 @@
#include <linux/interrupt.h>

#include <linux/mmc/host.h>
+#include <linux/workqueue.h>

#define DRV_NAME "via_sdmmc"

@@ -307,7 +308,7 @@ struct via_crdr_mmc_host {
struct sdhcreg pm_sdhc_reg;

struct work_struct carddet_work;
- struct tasklet_struct finish_tasklet;
+ struct work_struct finish_bh_work;

struct timer_list timer;
spinlock_t lock;
@@ -643,7 +644,7 @@ static void via_sdc_finish_data(struct via_crdr_mmc_host *host)
if (data->stop)
via_sdc_send_command(host, data->stop);
else
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}

static void via_sdc_finish_command(struct via_crdr_mmc_host *host)
@@ -653,7 +654,7 @@ static void via_sdc_finish_command(struct via_crdr_mmc_host *host)
host->cmd->error = 0;

if (!host->cmd->data)
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);

host->cmd = NULL;
}
@@ -682,7 +683,7 @@ static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq)
status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) {
host->mrq->cmd->error = -ENOMEDIUM;
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
} else {
via_sdc_send_command(host, mrq->cmd);
}
@@ -848,7 +849,7 @@ static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask)
host->cmd->error = -EILSEQ;

if (host->cmd->error)
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
else if (intmask & VIA_CRDR_SDSTS_CRD)
via_sdc_finish_command(host);
}
@@ -955,16 +956,16 @@ static void via_sdc_timeout(struct timer_list *t)
sdhost->cmd->error = -ETIMEDOUT;
else
sdhost->mrq->cmd->error = -ETIMEDOUT;
- tasklet_schedule(&sdhost->finish_tasklet);
+ queue_work(system_bh_wq, &sdhost->finish_bh_work);
}
}

spin_unlock_irqrestore(&sdhost->lock, flags);
}

-static void via_sdc_tasklet_finish(struct tasklet_struct *t)
+static void via_sdc_finish_bh_work(struct work_struct *t)
{
- struct via_crdr_mmc_host *host = from_tasklet(host, t, finish_tasklet);
+ struct via_crdr_mmc_host *host = from_work(host, t, finish_bh_work);
unsigned long flags;
struct mmc_request *mrq;

@@ -1005,7 +1006,7 @@ static void via_sdc_card_detect(struct work_struct *work)
pr_err("%s: Card removed during transfer!\n",
mmc_hostname(host->mmc));
host->mrq->cmd->error = -ENOMEDIUM;
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}

spin_unlock_irqrestore(&host->lock, flags);
@@ -1051,7 +1052,7 @@ static void via_init_mmc_host(struct via_crdr_mmc_host *host)

INIT_WORK(&host->carddet_work, via_sdc_card_detect);

- tasklet_setup(&host->finish_tasklet, via_sdc_tasklet_finish);
+ INIT_WORK(&host->finish_bh_work, via_sdc_finish_bh_work);

addrbase = host->sdhc_mmiobase;
writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
@@ -1193,7 +1194,7 @@ static void via_sd_remove(struct pci_dev *pcidev)
sdhost->mrq->cmd->error = -ENOMEDIUM;
if (sdhost->mrq->stop)
sdhost->mrq->stop->error = -ENOMEDIUM;
- tasklet_schedule(&sdhost->finish_tasklet);
+ queue_work(system_bh_wq, &sdhost->finish_bh_work);
}
spin_unlock_irqrestore(&sdhost->lock, flags);

@@ -1203,7 +1204,7 @@ static void via_sd_remove(struct pci_dev *pcidev)

del_timer_sync(&sdhost->timer);

- tasklet_kill(&sdhost->finish_tasklet);
+ cancel_work_sync(&sdhost->finish_bh_work);

/* switch off power */
gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index f0562f712d98..6e20405d0430 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -459,7 +459,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host)
* FIFO threshold interrupts properly.
*/
if ((data->blocks * data->blksz - data->bytes_xfered) < 16)
- tasklet_schedule(&host->fifo_tasklet);
+ queue_work(system_bh_wq, &host->fifo_bh_work);
}

static void wbsd_fill_fifo(struct wbsd_host *host)
@@ -524,7 +524,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host)
* 'FIFO empty' under certain conditions. So we
* need to be a bit more pro-active.
*/
- tasklet_schedule(&host->fifo_tasklet);
+ queue_work(system_bh_wq, &host->fifo_bh_work);
}

static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data)
@@ -746,7 +746,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
struct mmc_command *cmd;

/*
- * Disable tasklets to avoid a deadlock.
+ * Disable bh works to avoid a deadlock.
*/
spin_lock_bh(&host->lock);

@@ -821,7 +821,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
* Dirty fix for hardware bug.
*/
if (host->dma == -1)
- tasklet_schedule(&host->fifo_tasklet);
+ queue_work(system_bh_wq, &host->fifo_bh_work);

spin_unlock_bh(&host->lock);

@@ -961,13 +961,13 @@ static void wbsd_reset_ignore(struct timer_list *t)
* Card status might have changed during the
* blackout.
*/
- tasklet_schedule(&host->card_tasklet);
+ queue_work(system_bh_wq, &host->card_bh_work);

spin_unlock_bh(&host->lock);
}

/*
- * Tasklets
+ * BH Works
*/

static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host)
@@ -987,9 +987,9 @@ static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host)
return host->mrq->cmd->data;
}

-static void wbsd_tasklet_card(struct tasklet_struct *t)
+static void wbsd_card_bh_work(struct work_struct *t)
{
- struct wbsd_host *host = from_tasklet(host, t, card_tasklet);
+ struct wbsd_host *host = from_work(host, t, card_bh_work);
u8 csr;
int delay = -1;

@@ -1020,7 +1020,7 @@ static void wbsd_tasklet_card(struct tasklet_struct *t)
wbsd_reset(host);

host->mrq->cmd->error = -ENOMEDIUM;
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}

delay = 0;
@@ -1036,9 +1036,9 @@ static void wbsd_tasklet_card(struct tasklet_struct *t)
mmc_detect_change(host->mmc, msecs_to_jiffies(delay));
}

-static void wbsd_tasklet_fifo(struct tasklet_struct *t)
+static void wbsd_fifo_bh_work(struct work_struct *t)
{
- struct wbsd_host *host = from_tasklet(host, t, fifo_tasklet);
+ struct wbsd_host *host = from_work(host, t, fifo_bh_work);
struct mmc_data *data;

spin_lock(&host->lock);
@@ -1060,16 +1060,16 @@ static void wbsd_tasklet_fifo(struct tasklet_struct *t)
*/
if (host->num_sg == 0) {
wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);
}

end:
spin_unlock(&host->lock);
}

-static void wbsd_tasklet_crc(struct tasklet_struct *t)
+static void wbsd_crc_bh_work(struct work_struct *t)
{
- struct wbsd_host *host = from_tasklet(host, t, crc_tasklet);
+ struct wbsd_host *host = from_work(host, t, crc_bh_work);
struct mmc_data *data;

spin_lock(&host->lock);
@@ -1085,15 +1085,15 @@ static void wbsd_tasklet_crc(struct tasklet_struct *t)

data->error = -EILSEQ;

- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);

end:
spin_unlock(&host->lock);
}

-static void wbsd_tasklet_timeout(struct tasklet_struct *t)
+static void wbsd_timeout_bh_work(struct work_struct *t)
{
- struct wbsd_host *host = from_tasklet(host, t, timeout_tasklet);
+ struct wbsd_host *host = from_work(host, t, timeout_bh_work);
struct mmc_data *data;

spin_lock(&host->lock);
@@ -1109,15 +1109,15 @@ static void wbsd_tasklet_timeout(struct tasklet_struct *t)

data->error = -ETIMEDOUT;

- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);

end:
spin_unlock(&host->lock);
}

-static void wbsd_tasklet_finish(struct tasklet_struct *t)
+static void wbsd_finish_bh_work(struct work_struct *t)
{
- struct wbsd_host *host = from_tasklet(host, t, finish_tasklet);
+ struct wbsd_host *host = from_work(host, t, finish_bh_work);
struct mmc_data *data;

spin_lock(&host->lock);
@@ -1156,18 +1156,18 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id)
host->isr |= isr;

/*
- * Schedule tasklets as needed.
+ * Schedule bh work as needed.
*/
if (isr & WBSD_INT_CARD)
- tasklet_schedule(&host->card_tasklet);
+ queue_work(system_bh_wq, &host->card_bh_work);
if (isr & WBSD_INT_FIFO_THRE)
- tasklet_schedule(&host->fifo_tasklet);
+ queue_work(system_bh_wq, &host->fifo_bh_work);
if (isr & WBSD_INT_CRC)
- tasklet_hi_schedule(&host->crc_tasklet);
+ queue_work(system_bh_highpri_wq, &host->crc_bh_work);
if (isr & WBSD_INT_TIMEOUT)
- tasklet_hi_schedule(&host->timeout_tasklet);
+ queue_work(system_bh_highpri_wq, &host->timeout_bh_work);
if (isr & WBSD_INT_TC)
- tasklet_schedule(&host->finish_tasklet);
+ queue_work(system_bh_wq, &host->finish_bh_work);

return IRQ_HANDLED;
}
@@ -1443,13 +1443,13 @@ static int wbsd_request_irq(struct wbsd_host *host, int irq)
int ret;

/*
- * Set up tasklets. Must be done before requesting interrupt.
+ * Set up bh works. Must be done before requesting interrupt.
*/
- tasklet_setup(&host->card_tasklet, wbsd_tasklet_card);
- tasklet_setup(&host->fifo_tasklet, wbsd_tasklet_fifo);
- tasklet_setup(&host->crc_tasklet, wbsd_tasklet_crc);
- tasklet_setup(&host->timeout_tasklet, wbsd_tasklet_timeout);
- tasklet_setup(&host->finish_tasklet, wbsd_tasklet_finish);
+ INIT_WORK(&host->card_bh_work, wbsd_card_bh_work);
+ INIT_WORK(&host->fifo_bh_work, wbsd_fifo_bh_work);
+ INIT_WORK(&host->crc_bh_work, wbsd_crc_bh_work);
+ INIT_WORK(&host->timeout_bh_work, wbsd_timeout_bh_work);
+ INIT_WORK(&host->finish_bh_work, wbsd_finish_bh_work);

/*
* Allocate interrupt.
@@ -1472,11 +1472,11 @@ static void wbsd_release_irq(struct wbsd_host *host)

host->irq = 0;

- tasklet_kill(&host->card_tasklet);
- tasklet_kill(&host->fifo_tasklet);
- tasklet_kill(&host->crc_tasklet);
- tasklet_kill(&host->timeout_tasklet);
- tasklet_kill(&host->finish_tasklet);
+ cancel_work_sync(&host->card_bh_work);
+ cancel_work_sync(&host->fifo_bh_work);
+ cancel_work_sync(&host->crc_bh_work);
+ cancel_work_sync(&host->timeout_bh_work);
+ cancel_work_sync(&host->finish_bh_work);
}

/*
diff --git a/drivers/mmc/host/wbsd.h b/drivers/mmc/host/wbsd.h
index be30b4d8ce4c..970886831305 100644
--- a/drivers/mmc/host/wbsd.h
+++ b/drivers/mmc/host/wbsd.h
@@ -171,11 +171,11 @@ struct wbsd_host
int irq; /* Interrupt */
int dma; /* DMA channel */

- struct tasklet_struct card_tasklet; /* Tasklet structures */
- struct tasklet_struct fifo_tasklet;
- struct tasklet_struct crc_tasklet;
- struct tasklet_struct timeout_tasklet;
- struct tasklet_struct finish_tasklet;
+ struct work_struct card_bh_work; /* Work structures */
+ struct work_struct fifo_bh_work;
+ struct work_struct crc_bh_work;
+ struct work_struct timeout_bh_work;
+ struct work_struct finish_bh_work;

struct timer_list ignore_timer; /* Ignore detection timer */
};
--
2.34.1