[PATCH] amba: Ensure drvdata is NULL

[PATCH] amba: Ensure drvdata is NULL

[Michal Simek]

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This patch is inpired by the patch for drvdata
"device-core: Ensure drvdata = NULL when no driver is bound"
(sha1: 0998d0631001288a5974afc0b2a5f568bcdecb4d)

Also it fixes all occurences in drivers.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---
This patch has been sent as RFC in this thread.
http://lkml.org/lkml/2013/9/4/393

---
 arch/arm/kernel/etm.c           | 6 ------
 drivers/amba/bus.c              | 2 ++
 drivers/dma/pl330.c             | 3 ---
 drivers/input/serio/ambakmi.c   | 2 --
 drivers/mmc/host/mmci.c         | 2 --
 drivers/rtc/rtc-pl030.c         | 2 --
 drivers/rtc/rtc-pl031.c         | 2 --
 drivers/spi/spi-pl022.c         | 1 -
 drivers/tty/serial/amba-pl010.c | 3 ---
 drivers/tty/serial/amba-pl011.c | 3 ---
 drivers/video/amba-clcd.c       | 2 --
 drivers/watchdog/sp805_wdt.c    | 1 -
 12 files changed, 2 insertions(+), 27 deletions(-)

diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
index 8ff0ecd..131a6ab 100644
--- a/arch/arm/kernel/etm.c
+++ b/arch/arm/kernel/etm.c
@@ -385,7 +385,6 @@ out:
 	return ret;

 out_unmap:
-	amba_set_drvdata(dev, NULL);
 	iounmap(t->etb_regs);

 out_release:
@@ -398,8 +397,6 @@ static int etb_remove(struct amba_device *dev)
 {
 	struct tracectx *t = amba_get_drvdata(dev);

-	amba_set_drvdata(dev, NULL);
-
 	iounmap(t->etb_regs);
 	t->etb_regs = NULL;

@@ -588,7 +585,6 @@ out:
 	return ret;

 out_unmap:
-	amba_set_drvdata(dev, NULL);
 	iounmap(t->etm_regs);

 out_release:
@@ -601,8 +597,6 @@ static int etm_remove(struct amba_device *dev)
 {
 	struct tracectx *t = amba_get_drvdata(dev);

-	amba_set_drvdata(dev, NULL);
-
 	iounmap(t->etm_regs);
 	t->etm_regs = NULL;

diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index c670727..9762090 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -373,6 +373,7 @@ static int amba_probe(struct device *dev)
 		if (ret == 0)
 			break;

+		amba_set_drvdata(pcdev, NULL);
 		pm_runtime_disable(dev);
 		pm_runtime_set_suspended(dev);
 		pm_runtime_put_noidle(dev);
@@ -391,6 +392,7 @@ static int amba_remove(struct device *dev)

 	pm_runtime_get_sync(dev);
 	ret = drv->remove(pcdev);
+	amba_set_drvdata(pcdev, NULL);
 	pm_runtime_put_noidle(dev);

 	/* Undo the runtime PM settings in amba_probe() */
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index a562d24..dfb2931 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -3029,8 +3029,6 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)

 	return 0;
 probe_err3:
-	amba_set_drvdata(adev, NULL);
-
 	/* Idle the DMAC */
 	list_for_each_entry_safe(pch, _p, &pdmac->ddma.channels,
 			chan.device_node) {
@@ -3064,7 +3062,6 @@ static int pl330_remove(struct amba_device *adev)
 		of_dma_controller_free(adev->dev.of_node);

 	dma_async_device_unregister(&pdmac->ddma);
-	amba_set_drvdata(adev, NULL);

 	/* Idle the DMAC */
 	list_for_each_entry_safe(pch, _p, &pdmac->ddma.channels,
diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c
index 4e2fd44..b7c206d 100644
--- a/drivers/input/serio/ambakmi.c
+++ b/drivers/input/serio/ambakmi.c
@@ -167,8 +167,6 @@ static int amba_kmi_remove(struct amba_device *dev)
 {
 	struct amba_kmi_port *kmi = amba_get_drvdata(dev);

-	amba_set_drvdata(dev, NULL);
-
 	serio_unregister_port(kmi->io);
 	clk_put(kmi->clk);
 	iounmap(kmi->base);
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index c3785ed..07e17f1 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1678,8 +1678,6 @@ static int mmci_remove(struct amba_device *dev)
 {
 	struct mmc_host *mmc = amba_get_drvdata(dev);

-	amba_set_drvdata(dev, NULL);
-
 	if (mmc) {
 		struct mmci_host *host = mmc_priv(mmc);

diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
index 22bacdb..a804f75 100644
--- a/drivers/rtc/rtc-pl030.c
+++ b/drivers/rtc/rtc-pl030.c
@@ -153,8 +153,6 @@ static int pl030_remove(struct amba_device *dev)
 {
 	struct pl030_rtc *rtc = amba_get_drvdata(dev);

-	amba_set_drvdata(dev, NULL);
-
 	writel(0, rtc->base + RTC_CR);

 	free_irq(dev->irq[0], rtc);
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 0f0609b..c9ca86e 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -305,7 +305,6 @@ static int pl031_remove(struct amba_device *adev)
 {
 	struct pl031_local *ldata = dev_get_drvdata(&adev->dev);

-	amba_set_drvdata(adev, NULL);
 	free_irq(adev->irq[0], ldata);
 	rtc_device_unregister(ldata->rtc);
 	iounmap(ldata->base);
@@ -392,7 +391,6 @@ out_no_irq:
 	rtc_device_unregister(ldata->rtc);
 out_no_rtc:
 	iounmap(ldata->base);
-	amba_set_drvdata(adev, NULL);
 out_no_remap:
 	kfree(ldata);
 out:
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 9c511a9..f661a7e 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -2288,7 +2288,6 @@ pl022_remove(struct amba_device *adev)
 	amba_release_regions(adev);
 	tasklet_disable(&pl022->pump_transfers);
 	spi_unregister_master(pl022->master);
-	amba_set_drvdata(adev, NULL);
 	return 0;
 }

diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index 8b90f0b..33bd860 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -728,7 +728,6 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id)
 	amba_set_drvdata(dev, uap);
 	ret = uart_add_one_port(&amba_reg, &uap->port);
 	if (ret) {
-		amba_set_drvdata(dev, NULL);
 		amba_ports[i] = NULL;
 		clk_put(uap->clk);
  unmap:
@@ -745,8 +744,6 @@ static int pl010_remove(struct amba_device *dev)
 	struct uart_amba_port *uap = amba_get_drvdata(dev);
 	int i;

-	amba_set_drvdata(dev, NULL);
-
 	uart_remove_one_port(&amba_reg, &uap->port);

 	for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index aaa2286..7203864 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2147,7 +2147,6 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 	amba_set_drvdata(dev, uap);
 	ret = uart_add_one_port(&amba_reg, &uap->port);
 	if (ret) {
-		amba_set_drvdata(dev, NULL);
 		amba_ports[i] = NULL;
 		pl011_dma_remove(uap);
 	}
@@ -2160,8 +2159,6 @@ static int pl011_remove(struct amba_device *dev)
 	struct uart_amba_port *uap = amba_get_drvdata(dev);
 	int i;

-	amba_set_drvdata(dev, NULL);
-
 	uart_remove_one_port(&amba_reg, &uap->port);

 	for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
diff --git a/drivers/video/amba-clcd.c b/drivers/video/amba-clcd.c
index 0a2cce7..0bab6ab 100644
--- a/drivers/video/amba-clcd.c
+++ b/drivers/video/amba-clcd.c
@@ -594,8 +594,6 @@ static int clcdfb_remove(struct amba_device *dev)
 {
 	struct clcd_fb *fb = amba_get_drvdata(dev);

-	amba_set_drvdata(dev, NULL);
-
 	clcdfb_disable(fb);
 	unregister_framebuffer(&fb->fb);
 	if (fb->fb.cmap.len)
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 58df98a..3f786ce 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -268,7 +268,6 @@ static int sp805_wdt_remove(struct amba_device *adev)
 	struct sp805_wdt *wdt = amba_get_drvdata(adev);

 	watchdog_unregister_device(&wdt->wdd);
-	amba_set_drvdata(adev, NULL);
 	watchdog_set_drvdata(&wdt->wdd, NULL);

 	return 0;
--
1.8.2.3


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Re: [PATCH] amba: Ensure drvdata is NULL

[Russell King - ARM Linux]

On Mon, Sep 30, 2013 at 08:59:06AM +0200, Michal Simek wrote:
> This patch is inpired by the patch for drvdata
> "device-core: Ensure drvdata = NULL when no driver is bound"
> (sha1: 0998d0631001288a5974afc0b2a5f568bcdecb4d)
> 
> Also it fixes all occurences in drivers.
> 
> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
> ---
> This patch has been sent as RFC in this thread.
> http://lkml.org/lkml/2013/9/4/393

Why not have the driver core do this?  Then it gets applied to all bus
types uniformly.

Thanks.

Re: [PATCH] amba: Ensure drvdata is NULL

[Michal Simek]

On 10/02/2013 10:25 PM, Russell King - ARM Linux wrote:
> On Mon, Sep 30, 2013 at 08:59:06AM +0200, Michal Simek wrote:
>> This patch is inpired by the patch for drvdata
>> "device-core: Ensure drvdata = NULL when no driver is bound"
>> (sha1: 0998d0631001288a5974afc0b2a5f568bcdecb4d)
>>
>> Also it fixes all occurences in drivers.
>>
>> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
>> ---
>> This patch has been sent as RFC in this thread.
>> http://lkml.org/lkml/2013/9/4/393
> 
> Why not have the driver core do this?  Then it gets applied to all bus
> types uniformly.

ok - I have checked that path and it should be already done
in really_probe function which calls amba_probe() and then driver probe function.

It means that the patch should contain just "amba_set_drvdata(dev, NULL);"
removal and not touching bus.c file.

Thanks,
Michal