On Thu, Aug 07, 2014 at 06:51:00AM +0200, Nick Krause wrote:
> While compiling we see the following waring
>
> drivers/spi/spi-bfin5xx.c: In function 'bfin_spi_pump_transfers':
> drivers/spi/spi-bfin5xx.c:695:6: warning: 'cr_width' may be used uninitialized
> in this function [-Wuninitialized]
>
> Initialize it to prevent the above warning
>
> Signed-off-by: Nick Krause <xerofo...@gmail.com>
> ---
> drivers/spi/spi-bfin5xx.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
> index ebf720b..f268bf4 100644
> --- a/drivers/spi/spi-bfin5xx.c
> +++ b/drivers/spi/spi-bfin5xx.c
> @@ -559,7 +559,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
> struct spi_transfer *previous = NULL;
> struct bfin_spi_slave_data *chip = NULL;
> unsigned int bits_per_word;
> - u16 cr, cr_width, dma_width, dma_config;
> + u16 cr, cr_width = 0, dma_width, dma_config;
> u32 tranf_success = 1;
> u8 full_duplex = 0;
>
> @@ -648,7 +648,6 @@ static void bfin_spi_pump_transfers(unsigned long data)
> } else if (bits_per_word == 8) {
> drv_data->n_bytes = bits_per_word/8;
> drv_data->len = transfer->len;
> - cr_width = 0;
> drv_data->ops = &bfin_bfin_spi_transfer_ops_u8;
> }
So if we ever hit that uninitialized case, where bits_per_word is
neither 8 nor 16, we'll have ops set to NULL and end up wondering
why the kernel crashes a bit further down in the code. Not really
sure if that is an improvement.
Guenter
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
