* [PATCH] gpio: omap: prevent module from being unloaded while in use
@ 2015-06-25 15:13 Grygorii Strashko
2015-06-30 13:52 ` Alexandre Courbot
2015-07-16 12:27 ` Linus Walleij
0 siblings, 2 replies; 4+ messages in thread
From: Grygorii Strashko @ 2015-06-25 15:13 UTC (permalink / raw)
To: Linus Walleij, Alexandre Courbot, tony
Cc: Sekhar Nori, Santosh Shilimkar, Javier Martinez Canillas,
linux-omap, linux-gpio, linux-kernel, Grygorii Strashko
OMAP GPIO driver allowed to be built as loadable module, but it
doesn't set owner field in GPIO chip structure. As result,
module_get/put() API is not working and it's possible to unload
OMAP driver while in use:
omap_gpio 48051000.gpio: REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED
Hence, add missing configuration.
Cc: Tony Lindgren <tony@atomide.com>
Fixes: cac089f9026e ('gpio: omap: Allow building as a loadable module')
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
---
Hi Linus,
Seems this one is for 4.2-rc.
drivers/gpio/gpio-omap.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index a0ad803..61a731f 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1187,6 +1187,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
bank->irq = res->start;
bank->dev = dev;
bank->chip.dev = dev;
+ bank->chip.owner = THIS_MODULE;
bank->dbck_flag = pdata->dbck_flag;
bank->stride = pdata->bank_stride;
bank->width = pdata->bank_width;
--
2.4.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] gpio: omap: prevent module from being unloaded while in use
2015-06-25 15:13 [PATCH] gpio: omap: prevent module from being unloaded while in use Grygorii Strashko
@ 2015-06-30 13:52 ` Alexandre Courbot
2015-07-06 15:15 ` Grygorii Strashko
2015-07-16 12:27 ` Linus Walleij
1 sibling, 1 reply; 4+ messages in thread
From: Alexandre Courbot @ 2015-06-30 13:52 UTC (permalink / raw)
To: Grygorii Strashko
Cc: Linus Walleij, tony, Sekhar Nori, Santosh Shilimkar,
Javier Martinez Canillas, Linux OMAP Mailing List, linux-gpio,
Linux Kernel Mailing List
On Fri, Jun 26, 2015 at 12:13 AM, Grygorii Strashko
<grygorii.strashko@ti.com> wrote:
> OMAP GPIO driver allowed to be built as loadable module, but it
> doesn't set owner field in GPIO chip structure. As result,
> module_get/put() API is not working and it's possible to unload
> OMAP driver while in use:
>
> omap_gpio 48051000.gpio: REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED
>
> Hence, add missing configuration.
Isn't this also fixed by your other patch "gpiolib: assign chip owner
to dev->driver->owner if not set"?
Nevertheless,
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
For inclusion into -rc if the other patch is for the next cycle.
>
> Cc: Tony Lindgren <tony@atomide.com>
> Fixes: cac089f9026e ('gpio: omap: Allow building as a loadable module')
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> ---
> Hi Linus,
>
> Seems this one is for 4.2-rc.
>
> drivers/gpio/gpio-omap.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
> index a0ad803..61a731f 100644
> --- a/drivers/gpio/gpio-omap.c
> +++ b/drivers/gpio/gpio-omap.c
> @@ -1187,6 +1187,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
> bank->irq = res->start;
> bank->dev = dev;
> bank->chip.dev = dev;
> + bank->chip.owner = THIS_MODULE;
> bank->dbck_flag = pdata->dbck_flag;
> bank->stride = pdata->bank_stride;
> bank->width = pdata->bank_width;
> --
> 2.4.4
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] gpio: omap: prevent module from being unloaded while in use
2015-06-30 13:52 ` Alexandre Courbot
@ 2015-07-06 15:15 ` Grygorii Strashko
0 siblings, 0 replies; 4+ messages in thread
From: Grygorii Strashko @ 2015-07-06 15:15 UTC (permalink / raw)
To: Alexandre Courbot
Cc: Linus Walleij, tony, Sekhar Nori, Santosh Shilimkar,
Javier Martinez Canillas, Linux OMAP Mailing List, linux-gpio,
Linux Kernel Mailing List
On 06/30/2015 04:52 PM, Alexandre Courbot wrote:
> On Fri, Jun 26, 2015 at 12:13 AM, Grygorii Strashko
> <grygorii.strashko@ti.com> wrote:
>> OMAP GPIO driver allowed to be built as loadable module, but it
>> doesn't set owner field in GPIO chip structure. As result,
>> module_get/put() API is not working and it's possible to unload
>> OMAP driver while in use:
>>
>> omap_gpio 48051000.gpio: REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED
>>
>> Hence, add missing configuration.
>
> Isn't this also fixed by your other patch "gpiolib: assign chip owner
> to dev->driver->owner if not set"?
>
> Nevertheless,
>
> Acked-by: Alexandre Courbot <acourbot@nvidia.com>
>
> For inclusion into -rc if the other patch is for the next cycle.
Yes. I've sent this one for -rc as it's 100% fix and was not sure about
destiny of patch "gpiolib: assign chip owner.." :)
>
>>
>> Cc: Tony Lindgren <tony@atomide.com>
>> Fixes: cac089f9026e ('gpio: omap: Allow building as a loadable module')
>> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
>> ---
>> Hi Linus,
>>
>> Seems this one is for 4.2-rc.
>>
>> drivers/gpio/gpio-omap.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
>> index a0ad803..61a731f 100644
>> --- a/drivers/gpio/gpio-omap.c
>> +++ b/drivers/gpio/gpio-omap.c
>> @@ -1187,6 +1187,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
>> bank->irq = res->start;
>> bank->dev = dev;
>> bank->chip.dev = dev;
>> + bank->chip.owner = THIS_MODULE;
>> bank->dbck_flag = pdata->dbck_flag;
>> bank->stride = pdata->bank_stride;
>> bank->width = pdata->bank_width;
>> --
>> 2.4.4
>>
--
regards,
-grygorii
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] gpio: omap: prevent module from being unloaded while in use
2015-06-25 15:13 [PATCH] gpio: omap: prevent module from being unloaded while in use Grygorii Strashko
2015-06-30 13:52 ` Alexandre Courbot
@ 2015-07-16 12:27 ` Linus Walleij
1 sibling, 0 replies; 4+ messages in thread
From: Linus Walleij @ 2015-07-16 12:27 UTC (permalink / raw)
To: Grygorii Strashko
Cc: Alexandre Courbot, Tony Lindgren, Sekhar Nori, Santosh Shilimkar,
Javier Martinez Canillas, Linux-OMAP, linux-gpio, linux-kernel
On Thu, Jun 25, 2015 at 5:13 PM, Grygorii Strashko
<grygorii.strashko@ti.com> wrote:
> OMAP GPIO driver allowed to be built as loadable module, but it
> doesn't set owner field in GPIO chip structure. As result,
> module_get/put() API is not working and it's possible to unload
> OMAP driver while in use:
>
> omap_gpio 48051000.gpio: REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED
>
> Hence, add missing configuration.
>
> Cc: Tony Lindgren <tony@atomide.com>
> Fixes: cac089f9026e ('gpio: omap: Allow building as a loadable module')
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> ---
> Hi Linus,
>
> Seems this one is for 4.2-rc.
Yup applied for fixes with Alex' ACK.
The bigger fix is applied for devel and the best way to handle this
is open for discussion.
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 4+ messages in thread
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2015-06-25 15:13 [PATCH] gpio: omap: prevent module from being unloaded while in use Grygorii Strashko
2015-06-30 13:52 ` Alexandre Courbot
2015-07-06 15:15 ` Grygorii Strashko
2015-07-16 12:27 ` Linus Walleij
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