RE: [PATCH] spi: fsl-lpspi: Pre-initialize ret in fsl_lpspi_transfer_one_msg()

[Pandy Gao <pandy.gao@xxxxxxx>]

> From: Geert Uytterhoeven [mailto:geert@xxxxxxxxxxxxxx]
> Sent: Wednesday, December 14, 2016 7:21 PM
> To: Mark Brown <broonie@xxxxxxxxxx>; Pandy Gao
> <pandy.gao@xxxxxxx>
> Cc: linux-spi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Geert
> Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Subject: [PATCH] spi: fsl-lpspi: Pre-initialize ret in
> fsl_lpspi_transfer_one_msg()
> 
> With gcc 4.1.2:
> 
>     drivers/spi/spi-fsl-lpspi.c: In function ‘fsl_lpspi_transfer_one_msg’:
>     drivers/spi/spi-fsl-lpspi.c:369: warning: ‘ret’ may be used uninitialized
> in this function
> 
> If the message contains no transfers, the function will set the message's
> status to an uninitialized value, and will return that uninitialized value.
> 
> While __spi_validate() should have been called in all paths leading to this,
> and thus have rejected such messages, we better pre-initialize ret to be
> safe for future modifications (spi_transfer_one_message() also does this).
> 
> Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> ---

Acked-by: Gao Pan <pandy.gao@xxxxxxx>

Best Regards
Pandy
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