Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
introduced an array of quirk functions which get iterated over. But a
sentinal value is missing. Add it.
Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
Signed-off-by: Michael Walle <[email protected]>
---
FWIW here is the kernel oops backtrace:
[ 4.108706] Internal error: SP/PC alignment exception: 8a000000 [#1] SMP
[ 4.115470] Modules linked in:
[ 4.118549] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc5-next-20220916-00091-g6cae0fcbd5e7 #1821
[ 4.128033] Hardware name: Kontron KBox A-230-LS (DT)
[ 4.133127] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 4.140154] pc : 0x61722d6f697067
[ 4.143495] lr : of_find_gpio+0x138/0x174
[ 4.147546] sp : ffff80000a24b680
[ 4.150884] x29: ffff80000a24b680 x28: 0000000000000000 x27: ffff80000996044c
[ 4.158090] x26: 0000000000000001 x25: ffff80000970f588 x24: ffff800009297968
[ 4.165295] x23: ffff80000a24b770 x22: 0000000000000000 x21: ffff0020009a7010
[ 4.172500] x20: ffff8000097752f8 x19: fffffffffffffffe x18: 0000000000000000
[ 4.179703] x17: ffff8000085fb9d0 x16: ffff8000085fb264 x15: ffff8000085f96ac
[ 4.186907] x14: 0000000000000000 x13: ffff80000884b3e8 x12: ffff80000884ab04
[ 4.194111] x11: ffff80000884aa54 x10: 0000000000025080 x9 : ffff8000085fce78
[ 4.201316] x8 : 0101010101010101 x7 : ffff800009750268 x6 : 051f521459491b57
[ 4.208520] x5 : 571b495914521f05 x4 : 6e61722d6f697067 x3 : ffff80000a24b6d4
[ 4.215724] x2 : 0000000000000000 x1 : ffff8000097752f8 x0 : ffff00207f7e4b20
[ 4.222928] Call trace:
[ 4.225389] 0x61722d6f697067
[ 4.228377] gpiod_get_index+0x12c/0x440
[ 4.232334] devm_gpiod_get_index+0x34/0xf0
[ 4.236553] devm_gpiod_get_optional+0x20/0x40
[ 4.241036] uart_get_rs485_mode+0x104/0x180
[ 4.245345] serial8250_register_8250_port+0x198/0x484
[ 4.250532] of_platform_serial_probe+0x358/0x640
[ 4.255279] platform_probe+0x70/0xe0
[ 4.258973] really_probe+0xc4/0x2e4
[ 4.262577] __driver_probe_device+0x80/0xec
[ 4.266882] driver_probe_device+0x44/0x150
[ 4.271100] __driver_attach+0x88/0x1a0
[ 4.274967] bus_for_each_dev+0x78/0xdc
[ 4.278833] driver_attach+0x2c/0x40
[ 4.282437] bus_add_driver+0x15c/0x210
[ 4.286303] driver_register+0x80/0x13c
[ 4.290170] __platform_driver_register+0x30/0x3c
[ 4.294915] of_platform_serial_driver_init+0x24/0x30
[ 4.300013] do_one_initcall+0x4c/0x240
[ 4.303882] kernel_init_freeable+0x29c/0x30c
[ 4.308276] kernel_init+0x2c/0x140
[ 4.311793] ret_from_fork+0x10/0x20
[ 4.315401] Code: bad PC value
drivers/gpio/gpiolib-of.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 95be5f0d2623..0e4e1291604d 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -498,6 +498,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
of_find_regulator_gpio,
of_find_arizona_gpio,
of_find_usb_gpio,
+ NULL
};
struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
--
2.30.2
On Fri, Sep 16, 2022 at 1:01 PM Michael Walle <[email protected]> wrote:
> Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> introduced an array of quirk functions which get iterated over. But a
> sentinal value is missing. Add it.
>
> Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> Signed-off-by: Michael Walle <[email protected]>
Looks correct, an alternative would be to have the for-loop use
ARRAY_SIZE() but this is just as good.
Reviewed-by: Linus Walleij <[email protected]>
Yours,
Linus Walleij
On 16/09/2022 12:01, Michael Walle wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> introduced an array of quirk functions which get iterated over. But a
> sentinal value is missing. Add it.
>
> Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> Signed-off-by: Michael Walle <[email protected]>
Tested-by: Conor Dooley <[email protected]>
> ---
> FWIW here is the kernel oops backtrace:
> [ 4.108706] Internal error: SP/PC alignment exception: 8a000000 [#1] SMP
> [ 4.115470] Modules linked in:
> [ 4.118549] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc5-next-20220916-00091-g6cae0fcbd5e7 #1821
> [ 4.128033] Hardware name: Kontron KBox A-230-LS (DT)
> [ 4.133127] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [ 4.140154] pc : 0x61722d6f697067
> [ 4.143495] lr : of_find_gpio+0x138/0x174
> [ 4.147546] sp : ffff80000a24b680
> [ 4.150884] x29: ffff80000a24b680 x28: 0000000000000000 x27: ffff80000996044c
> [ 4.158090] x26: 0000000000000001 x25: ffff80000970f588 x24: ffff800009297968
> [ 4.165295] x23: ffff80000a24b770 x22: 0000000000000000 x21: ffff0020009a7010
> [ 4.172500] x20: ffff8000097752f8 x19: fffffffffffffffe x18: 0000000000000000
> [ 4.179703] x17: ffff8000085fb9d0 x16: ffff8000085fb264 x15: ffff8000085f96ac
> [ 4.186907] x14: 0000000000000000 x13: ffff80000884b3e8 x12: ffff80000884ab04
> [ 4.194111] x11: ffff80000884aa54 x10: 0000000000025080 x9 : ffff8000085fce78
> [ 4.201316] x8 : 0101010101010101 x7 : ffff800009750268 x6 : 051f521459491b57
> [ 4.208520] x5 : 571b495914521f05 x4 : 6e61722d6f697067 x3 : ffff80000a24b6d4
> [ 4.215724] x2 : 0000000000000000 x1 : ffff8000097752f8 x0 : ffff00207f7e4b20
> [ 4.222928] Call trace:
> [ 4.225389] 0x61722d6f697067
> [ 4.228377] gpiod_get_index+0x12c/0x440
> [ 4.232334] devm_gpiod_get_index+0x34/0xf0
> [ 4.236553] devm_gpiod_get_optional+0x20/0x40
> [ 4.241036] uart_get_rs485_mode+0x104/0x180
> [ 4.245345] serial8250_register_8250_port+0x198/0x484
> [ 4.250532] of_platform_serial_probe+0x358/0x640
> [ 4.255279] platform_probe+0x70/0xe0
> [ 4.258973] really_probe+0xc4/0x2e4
> [ 4.262577] __driver_probe_device+0x80/0xec
> [ 4.266882] driver_probe_device+0x44/0x150
> [ 4.271100] __driver_attach+0x88/0x1a0
> [ 4.274967] bus_for_each_dev+0x78/0xdc
> [ 4.278833] driver_attach+0x2c/0x40
> [ 4.282437] bus_add_driver+0x15c/0x210
> [ 4.286303] driver_register+0x80/0x13c
> [ 4.290170] __platform_driver_register+0x30/0x3c
> [ 4.294915] of_platform_serial_driver_init+0x24/0x30
> [ 4.300013] do_one_initcall+0x4c/0x240
> [ 4.303882] kernel_init_freeable+0x29c/0x30c
> [ 4.308276] kernel_init+0x2c/0x140
> [ 4.311793] ret_from_fork+0x10/0x20
> [ 4.315401] Code: bad PC value
>
> drivers/gpio/gpiolib-of.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index 95be5f0d2623..0e4e1291604d 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -498,6 +498,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
> of_find_regulator_gpio,
> of_find_arizona_gpio,
> of_find_usb_gpio,
> + NULL
> };
>
> struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
> --
> 2.30.2
>
On Fri, Sep 16, 2022 at 01:01:18PM +0200, Michael Walle wrote:
> Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> introduced an array of quirk functions which get iterated over. But a
> sentinal value is missing. Add it.
Oof... Sorry about that.
>
> Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> Signed-off-by: Michael Walle <[email protected]>
Reviewed-by: Dmitry Torokhov <[email protected]>
Thanks.
--
Dmitry
On 16.09.2022 13:01, Michael Walle wrote:
> Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> introduced an array of quirk functions which get iterated over. But a
> sentinal value is missing. Add it.
>
> Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> Signed-off-by: Michael Walle <[email protected]>
This fixes the boot issue on all my test machines I've observed with
linux next-20220916. Thanks!
Tested-by: Marek Szyprowski <[email protected]>
> ---
> FWIW here is the kernel oops backtrace:
> [ 4.108706] Internal error: SP/PC alignment exception: 8a000000 [#1] SMP
> [ 4.115470] Modules linked in:
> [ 4.118549] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc5-next-20220916-00091-g6cae0fcbd5e7 #1821
> [ 4.128033] Hardware name: Kontron KBox A-230-LS (DT)
> [ 4.133127] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [ 4.140154] pc : 0x61722d6f697067
> [ 4.143495] lr : of_find_gpio+0x138/0x174
> [ 4.147546] sp : ffff80000a24b680
> [ 4.150884] x29: ffff80000a24b680 x28: 0000000000000000 x27: ffff80000996044c
> [ 4.158090] x26: 0000000000000001 x25: ffff80000970f588 x24: ffff800009297968
> [ 4.165295] x23: ffff80000a24b770 x22: 0000000000000000 x21: ffff0020009a7010
> [ 4.172500] x20: ffff8000097752f8 x19: fffffffffffffffe x18: 0000000000000000
> [ 4.179703] x17: ffff8000085fb9d0 x16: ffff8000085fb264 x15: ffff8000085f96ac
> [ 4.186907] x14: 0000000000000000 x13: ffff80000884b3e8 x12: ffff80000884ab04
> [ 4.194111] x11: ffff80000884aa54 x10: 0000000000025080 x9 : ffff8000085fce78
> [ 4.201316] x8 : 0101010101010101 x7 : ffff800009750268 x6 : 051f521459491b57
> [ 4.208520] x5 : 571b495914521f05 x4 : 6e61722d6f697067 x3 : ffff80000a24b6d4
> [ 4.215724] x2 : 0000000000000000 x1 : ffff8000097752f8 x0 : ffff00207f7e4b20
> [ 4.222928] Call trace:
> [ 4.225389] 0x61722d6f697067
> [ 4.228377] gpiod_get_index+0x12c/0x440
> [ 4.232334] devm_gpiod_get_index+0x34/0xf0
> [ 4.236553] devm_gpiod_get_optional+0x20/0x40
> [ 4.241036] uart_get_rs485_mode+0x104/0x180
> [ 4.245345] serial8250_register_8250_port+0x198/0x484
> [ 4.250532] of_platform_serial_probe+0x358/0x640
> [ 4.255279] platform_probe+0x70/0xe0
> [ 4.258973] really_probe+0xc4/0x2e4
> [ 4.262577] __driver_probe_device+0x80/0xec
> [ 4.266882] driver_probe_device+0x44/0x150
> [ 4.271100] __driver_attach+0x88/0x1a0
> [ 4.274967] bus_for_each_dev+0x78/0xdc
> [ 4.278833] driver_attach+0x2c/0x40
> [ 4.282437] bus_add_driver+0x15c/0x210
> [ 4.286303] driver_register+0x80/0x13c
> [ 4.290170] __platform_driver_register+0x30/0x3c
> [ 4.294915] of_platform_serial_driver_init+0x24/0x30
> [ 4.300013] do_one_initcall+0x4c/0x240
> [ 4.303882] kernel_init_freeable+0x29c/0x30c
> [ 4.308276] kernel_init+0x2c/0x140
> [ 4.311793] ret_from_fork+0x10/0x20
> [ 4.315401] Code: bad PC value
>
> drivers/gpio/gpiolib-of.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index 95be5f0d2623..0e4e1291604d 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -498,6 +498,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
> of_find_regulator_gpio,
> of_find_arizona_gpio,
> of_find_usb_gpio,
> + NULL
> };
>
> struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
On 16.09.2022 13:01, Michael Walle wrote:
> Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> introduced an array of quirk functions which get iterated over. But a
> sentinal value is missing. Add it.
>
> Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> Signed-off-by: Michael Walle <[email protected]>
This fixes the boot issue on RZ/G2L board since next-20220916.
Tested-by: Biju Das <[email protected]>
> ---
> FWIW here is the kernel oops backtrace:
> [ 4.108706] Internal error: SP/PC alignment exception: 8a000000 [#1] SMP
> [ 4.115470] Modules linked in:
> [ 4.118549] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc5-next-20220916-00091-g6cae0fcbd5e7 #1821
> [ 4.128033] Hardware name: Kontron KBox A-230-LS (DT)
> [ 4.133127] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [ 4.140154] pc : 0x61722d6f697067
> [ 4.143495] lr : of_find_gpio+0x138/0x174
> [ 4.147546] sp : ffff80000a24b680
> [ 4.150884] x29: ffff80000a24b680 x28: 0000000000000000 x27: ffff80000996044c
> [ 4.158090] x26: 0000000000000001 x25: ffff80000970f588 x24: ffff800009297968
> [ 4.165295] x23: ffff80000a24b770 x22: 0000000000000000 x21: ffff0020009a7010
> [ 4.172500] x20: ffff8000097752f8 x19: fffffffffffffffe x18: 0000000000000000
> [ 4.179703] x17: ffff8000085fb9d0 x16: ffff8000085fb264 x15: ffff8000085f96ac
> [ 4.186907] x14: 0000000000000000 x13: ffff80000884b3e8 x12: ffff80000884ab04
> [ 4.194111] x11: ffff80000884aa54 x10: 0000000000025080 x9 : ffff8000085fce78
> [ 4.201316] x8 : 0101010101010101 x7 : ffff800009750268 x6 : 051f521459491b57
> [ 4.208520] x5 : 571b495914521f05 x4 : 6e61722d6f697067 x3 : ffff80000a24b6d4
> [ 4.215724] x2 : 0000000000000000 x1 : ffff8000097752f8 x0 : ffff00207f7e4b20
> [ 4.222928] Call trace:
> [ 4.225389] 0x61722d6f697067
> [ 4.228377] gpiod_get_index+0x12c/0x440
> [ 4.232334] devm_gpiod_get_index+0x34/0xf0
> [ 4.236553] devm_gpiod_get_optional+0x20/0x40
> [ 4.241036] uart_get_rs485_mode+0x104/0x180
> [ 4.245345] serial8250_register_8250_port+0x198/0x484
> [ 4.250532] of_platform_serial_probe+0x358/0x640
> [ 4.255279] platform_probe+0x70/0xe0
> [ 4.258973] really_probe+0xc4/0x2e4
> [ 4.262577] __driver_probe_device+0x80/0xec
> [ 4.266882] driver_probe_device+0x44/0x150
> [ 4.271100] __driver_attach+0x88/0x1a0
> [ 4.274967] bus_for_each_dev+0x78/0xdc
> [ 4.278833] driver_attach+0x2c/0x40
> [ 4.282437] bus_add_driver+0x15c/0x210
> [ 4.286303] driver_register+0x80/0x13c
> [ 4.290170] __platform_driver_register+0x30/0x3c
> [ 4.294915] of_platform_serial_driver_init+0x24/0x30
> [ 4.300013] do_one_initcall+0x4c/0x240
> [ 4.303882] kernel_init_freeable+0x29c/0x30c
> [ 4.308276] kernel_init+0x2c/0x140
> [ 4.311793] ret_from_fork+0x10/0x20
> [ 4.315401] Code: bad PC value
>
> drivers/gpio/gpiolib-of.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index 95be5f0d2623..0e4e1291604d 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -498,6 +498,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
> of_find_regulator_gpio,
> of_find_arizona_gpio,
> of_find_usb_gpio,
> + NULL
> };
>
> struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
Best regards
--
Biju
Hi All,
> Subject: Re: [PATCH] gpiolib: fix OOB access in quirk callbacks
>
> On 16.09.2022 13:01, Michael Walle wrote:
> > Commit a2b5e207cade ("gpiolib: rework quirk handling in
> > of_find_gpio()") introduced an array of quirk functions which get
> > iterated over. But a sentinal value is missing. Add it.
> >
> > Fixes: a2b5e207cade ("gpiolib: rework quirk handling in
> > of_find_gpio()")
> > Signed-off-by: Michael Walle <[email protected]>
>
> This fixes the boot issue on RZ/G2L board since next-20220916.
>
> Tested-by: Biju Das <[email protected]>
>
> > ---
> > FWIW here is the kernel oops backtrace:
> > [ 4.108706] Internal error: SP/PC alignment exception: 8a000000
> [#1] SMP
> > [ 4.115470] Modules linked in:
> > [ 4.118549] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc5-
> next-20220916-00091-g6cae0fcbd5e7 #1821
> > [ 4.128033] Hardware name: Kontron KBox A-230-LS (DT)
> > [ 4.133127] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS
> BTYPE=--)
> > [ 4.140154] pc : 0x61722d6f697067
> > [ 4.143495] lr : of_find_gpio+0x138/0x174
> > [ 4.147546] sp : ffff80000a24b680
> > [ 4.150884] x29: ffff80000a24b680 x28: 0000000000000000 x27:
> ffff80000996044c
> > [ 4.158090] x26: 0000000000000001 x25: ffff80000970f588 x24:
> ffff800009297968
> > [ 4.165295] x23: ffff80000a24b770 x22: 0000000000000000 x21:
> ffff0020009a7010
> > [ 4.172500] x20: ffff8000097752f8 x19: fffffffffffffffe x18:
> 0000000000000000
> > [ 4.179703] x17: ffff8000085fb9d0 x16: ffff8000085fb264 x15:
> ffff8000085f96ac
> > [ 4.186907] x14: 0000000000000000 x13: ffff80000884b3e8 x12:
> ffff80000884ab04
> > [ 4.194111] x11: ffff80000884aa54 x10: 0000000000025080 x9 :
> ffff8000085fce78
> > [ 4.201316] x8 : 0101010101010101 x7 : ffff800009750268 x6 :
> 051f521459491b57
> > [ 4.208520] x5 : 571b495914521f05 x4 : 6e61722d6f697067 x3 :
> ffff80000a24b6d4
> > [ 4.215724] x2 : 0000000000000000 x1 : ffff8000097752f8 x0 :
> ffff00207f7e4b20
> > [ 4.222928] Call trace:
> > [ 4.225389] 0x61722d6f697067
> > [ 4.228377] gpiod_get_index+0x12c/0x440
> > [ 4.232334] devm_gpiod_get_index+0x34/0xf0
> > [ 4.236553] devm_gpiod_get_optional+0x20/0x40
> > [ 4.241036] uart_get_rs485_mode+0x104/0x180
> > [ 4.245345] serial8250_register_8250_port+0x198/0x484
> > [ 4.250532] of_platform_serial_probe+0x358/0x640
> > [ 4.255279] platform_probe+0x70/0xe0
> > [ 4.258973] really_probe+0xc4/0x2e4
> > [ 4.262577] __driver_probe_device+0x80/0xec
> > [ 4.266882] driver_probe_device+0x44/0x150
> > [ 4.271100] __driver_attach+0x88/0x1a0
> > [ 4.274967] bus_for_each_dev+0x78/0xdc
> > [ 4.278833] driver_attach+0x2c/0x40
> > [ 4.282437] bus_add_driver+0x15c/0x210
> > [ 4.286303] driver_register+0x80/0x13c
> > [ 4.290170] __platform_driver_register+0x30/0x3c
> > [ 4.294915] of_platform_serial_driver_init+0x24/0x30
> > [ 4.300013] do_one_initcall+0x4c/0x240
> > [ 4.303882] kernel_init_freeable+0x29c/0x30c
> > [ 4.308276] kernel_init+0x2c/0x140
> > [ 4.311793] ret_from_fork+0x10/0x20
> > [ 4.315401] Code: bad PC value
> >
> > drivers/gpio/gpiolib-of.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> > index 95be5f0d2623..0e4e1291604d 100644
> > --- a/drivers/gpio/gpiolib-of.c
> > +++ b/drivers/gpio/gpiolib-of.c
> > @@ -498,6 +498,7 @@ static const of_find_gpio_quirk
> of_find_gpio_quirks[] = {
> > of_find_regulator_gpio,
> > of_find_arizona_gpio,
> > of_find_usb_gpio,
> > + NULL
> > };
> >
> > struct gpio_desc *of_find_gpio(struct device *dev, const char
> > *con_id,
>
Can we revert the offending patch? or apply this patch
As the boards are not booting with Linux next since
next-20220916 tag.
Cheers,
Biju
On Fri, Sep 16, 2022 at 1:01 PM Michael Walle <[email protected]> wrote:
>
> Commit a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> introduced an array of quirk functions which get iterated over. But a
> sentinal value is missing. Add it.
>
> Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
> Signed-off-by: Michael Walle <[email protected]>
> ---
> FWIW here is the kernel oops backtrace:
> [ 4.108706] Internal error: SP/PC alignment exception: 8a000000 [#1] SMP
> [ 4.115470] Modules linked in:
> [ 4.118549] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc5-next-20220916-00091-g6cae0fcbd5e7 #1821
> [ 4.128033] Hardware name: Kontron KBox A-230-LS (DT)
> [ 4.133127] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [ 4.140154] pc : 0x61722d6f697067
> [ 4.143495] lr : of_find_gpio+0x138/0x174
> [ 4.147546] sp : ffff80000a24b680
> [ 4.150884] x29: ffff80000a24b680 x28: 0000000000000000 x27: ffff80000996044c
> [ 4.158090] x26: 0000000000000001 x25: ffff80000970f588 x24: ffff800009297968
> [ 4.165295] x23: ffff80000a24b770 x22: 0000000000000000 x21: ffff0020009a7010
> [ 4.172500] x20: ffff8000097752f8 x19: fffffffffffffffe x18: 0000000000000000
> [ 4.179703] x17: ffff8000085fb9d0 x16: ffff8000085fb264 x15: ffff8000085f96ac
> [ 4.186907] x14: 0000000000000000 x13: ffff80000884b3e8 x12: ffff80000884ab04
> [ 4.194111] x11: ffff80000884aa54 x10: 0000000000025080 x9 : ffff8000085fce78
> [ 4.201316] x8 : 0101010101010101 x7 : ffff800009750268 x6 : 051f521459491b57
> [ 4.208520] x5 : 571b495914521f05 x4 : 6e61722d6f697067 x3 : ffff80000a24b6d4
> [ 4.215724] x2 : 0000000000000000 x1 : ffff8000097752f8 x0 : ffff00207f7e4b20
> [ 4.222928] Call trace:
> [ 4.225389] 0x61722d6f697067
> [ 4.228377] gpiod_get_index+0x12c/0x440
> [ 4.232334] devm_gpiod_get_index+0x34/0xf0
> [ 4.236553] devm_gpiod_get_optional+0x20/0x40
> [ 4.241036] uart_get_rs485_mode+0x104/0x180
> [ 4.245345] serial8250_register_8250_port+0x198/0x484
> [ 4.250532] of_platform_serial_probe+0x358/0x640
> [ 4.255279] platform_probe+0x70/0xe0
> [ 4.258973] really_probe+0xc4/0x2e4
> [ 4.262577] __driver_probe_device+0x80/0xec
> [ 4.266882] driver_probe_device+0x44/0x150
> [ 4.271100] __driver_attach+0x88/0x1a0
> [ 4.274967] bus_for_each_dev+0x78/0xdc
> [ 4.278833] driver_attach+0x2c/0x40
> [ 4.282437] bus_add_driver+0x15c/0x210
> [ 4.286303] driver_register+0x80/0x13c
> [ 4.290170] __platform_driver_register+0x30/0x3c
> [ 4.294915] of_platform_serial_driver_init+0x24/0x30
> [ 4.300013] do_one_initcall+0x4c/0x240
> [ 4.303882] kernel_init_freeable+0x29c/0x30c
> [ 4.308276] kernel_init+0x2c/0x140
> [ 4.311793] ret_from_fork+0x10/0x20
> [ 4.315401] Code: bad PC value
>
> drivers/gpio/gpiolib-of.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index 95be5f0d2623..0e4e1291604d 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -498,6 +498,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
> of_find_regulator_gpio,
> of_find_arizona_gpio,
> of_find_usb_gpio,
> + NULL
> };
>
> struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
> --
> 2.30.2
>
Applied, thanks!
Bartosz