On Thu, 23 Mar 2017 16:15:55 +0100,
Arnd Bergmann wrote:
>
> The latest gcc-7.0.1 snapshot points out that we if nr_ch is zero, we never
> initialize some variables:
>
> sound/pci/au88x0/au88x0_core.c: In function 'vortex_adb_allocroute':
> sound/pci/au88x0/au88x0_core.c:2304:68: error: 'mix[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> sound/pci/au88x0/au88x0_core.c:2305:58: error: 'src[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
>
> I assume this can never happen in practice, but adding a check here doesn't
> hurt either and avoids the warning. The code has been unchanged since
> the start of git history.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Yeah, this shouldn't happen in practice, but better to cover.
I applied the patch now. Thanks.
Takashi
> ---
> sound/pci/au88x0/au88x0_core.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/sound/pci/au88x0/au88x0_core.c b/sound/pci/au88x0/au88x0_core.c
> index e1af24f87566..c308a4f70550 100644
> --- a/sound/pci/au88x0/au88x0_core.c
> +++ b/sound/pci/au88x0/au88x0_core.c
> @@ -2279,6 +2279,9 @@ vortex_adb_allocroute(vortex_t *vortex, int dma, int nr_ch, int dir,
> } else {
> int src[2], mix[2];
>
> + if (nr_ch < 1)
> + return -EINVAL;
> +
> /* Get SRC and MIXER hardware resources. */
> for (i = 0; i < nr_ch; i++) {
> if ((mix[i] =
> --
> 2.9.0
>
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