[PATCH/RFC] soc: bcm2835: Make !RASPBERRYPI_FIRMWARE dummies return failure

[Florian Fainelli]

On 04/08/2018 02:05 AM, Geert Uytterhoeven wrote:
> If CONFIG_RASPBERRYPI_FIRMWARE=n:
> 
>     drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_polarity’:
>     drivers/gpio/gpio-raspberrypi-exp.c:71: warning: ‘get.polarity’ is used uninitialized in this function
>     drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_direction’:
>     drivers/gpio/gpio-raspberrypi-exp.c:150: warning: ‘get.direction’ is used uninitialized in this function
> 
> The dummy firmware interface functions return 0, which means success,
> causing subsequent code to make use of the never initialized output
> parameter.
> 
> Fix this by making the dummy functions return an error code (-ENOSYS)
> instead.
> 
> Note that this assumes the firmware always fills in the requested data
> in the CONFIG_RASPBERRYPI_FIRMWARE=y case.
> 
> Fixes: d45f1a563b92dac7 ("staging: vc04_services: fix up rpi firmware functions")
> Signed-off-by: Geert Uytterhoeven <geert at linux-m68k.org>

Applied, thanks Geert!
-- 
Florian