* [PATCH] gpio: xgs-iproc: Fix crash when driver is built as a module
@ 2019-11-07 10:35 Jon Hunter
2019-11-07 15:01 ` Linus Walleij
0 siblings, 1 reply; 2+ messages in thread
From: Jon Hunter @ 2019-11-07 10:35 UTC (permalink / raw)
To: Chris Packham, Linus Walleij, Bartosz Golaszewski
Cc: linux-gpio, linux-kernel, linux-tegra, rjui, sbranden, Jon Hunter
Commit 6a41b6c5fc20 ("gpio: Add xgs-iproc driver") introduced a new
GPIO driver for the Broadcom GPIO controller. When this driver is built
as a module the following warning is observed because the
bcm_iproc_gpio_of_match structure is defined with the __initconst
attribute ...
MODPOST vmlinux.o
WARNING: vmlinux.o(.data+0x834d0): Section mismatch in reference from
the variable bcm_iproc_gpio_driver to the variable
.init.rodata:bcm_iproc_gpio_of_match
The variable bcm_iproc_gpio_driver references
the variable __initconst bcm_iproc_gpio_of_match
This then causes a translation fault on boot which and results in a
system crash. Fix this by dropping the __initconst attribute from the
bcm_iproc_gpio_of_match structure.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
drivers/gpio/gpio-xgs-iproc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-xgs-iproc.c b/drivers/gpio/gpio-xgs-iproc.c
index a3fdd95cc9e6..bb183f584d92 100644
--- a/drivers/gpio/gpio-xgs-iproc.c
+++ b/drivers/gpio/gpio-xgs-iproc.c
@@ -299,7 +299,7 @@ static int __exit iproc_gpio_remove(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id bcm_iproc_gpio_of_match[] __initconst = {
+static const struct of_device_id bcm_iproc_gpio_of_match[] = {
{ .compatible = "brcm,iproc-gpio-cca" },
{}
};
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] gpio: xgs-iproc: Fix crash when driver is built as a module
2019-11-07 10:35 [PATCH] gpio: xgs-iproc: Fix crash when driver is built as a module Jon Hunter
@ 2019-11-07 15:01 ` Linus Walleij
0 siblings, 0 replies; 2+ messages in thread
From: Linus Walleij @ 2019-11-07 15:01 UTC (permalink / raw)
To: Jon Hunter
Cc: Chris Packham, Bartosz Golaszewski, open list:GPIO SUBSYSTEM,
linux-kernel, linux-tegra, Ray Jui, Scott Branden
On Thu, Nov 7, 2019 at 11:35 AM Jon Hunter <jonathanh@nvidia.com> wrote:
> Commit 6a41b6c5fc20 ("gpio: Add xgs-iproc driver") introduced a new
> GPIO driver for the Broadcom GPIO controller. When this driver is built
> as a module the following warning is observed because the
> bcm_iproc_gpio_of_match structure is defined with the __initconst
> attribute ...
>
> MODPOST vmlinux.o
> WARNING: vmlinux.o(.data+0x834d0): Section mismatch in reference from
> the variable bcm_iproc_gpio_driver to the variable
> .init.rodata:bcm_iproc_gpio_of_match
> The variable bcm_iproc_gpio_driver references
> the variable __initconst bcm_iproc_gpio_of_match
>
> This then causes a translation fault on boot which and results in a
> system crash. Fix this by dropping the __initconst attribute from the
> bcm_iproc_gpio_of_match structure.
>
> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Incidentally Mark Brown already sent an identical patch.
Thanks anyway!
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 2+ messages in thread
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