Re: [PATCH] spi: rspi: avoid uninitialized variable access

[Hiep Cao Minh]

Hi Arnd,

Thanks for your fixed patch.

On 11/08/2016 10:46 PM, Arnd Bergmann wrote:
> The newly introduced rspi_pio_transfer_in_or_our() function must
> take either a valid 'rx' or 'tx' pointer, and has undefined behavior
> if both are NULL, as found by 'gcc -Wmaybe-unintialized':
>
> drivers/spi/spi-rspi.c: In function 'rspi_pio_transfer_in_or_our':
> drivers/spi/spi-rspi.c:558:5: error: 'len' may be used uninitialized in this function [-Werror=maybe-uninitialized]
Could you tell me what kind of GCC are you using?
I'd like to reproduce it on my environment, too.
I am using the Linaro's gcc of 
"gcc-linaro-arm-linux-gnueabihf-4.8-2014.04_linux".
But there is no error message like this on my environment.


Best regards,
Jinzai Solution Inc,
Hiep.