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ALSA: xen-front: fix unsigned error check on return from to_sndif_format

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The negative error return from the call to to_sndif_format is being
assigned to an unsigned 8 bit integer and hence the check for a negative
value is always going to be false.  Fix this by using ret as the error
return and hence the negative error can be detected and assign
the u8 sndif_format to ret if there is no error.

Detected by CoverityScan, CID#1469385 ("Unsigned compared against 0")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamoccchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Colin Ian King 2018-05-27 22:32:19 +01:00 committed by Takashi Iwai
parent 3d62461737
commit 014cea591a
1 changed files with 4 additions and 3 deletions
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7
sound/xen/xen_snd_front_alsa.c
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@ -466,13 +466,14 @@ static int alsa_prepare(struct snd_pcm_substream *substream)
u8 sndif_format;
int ret;
sndif_format = to_sndif_format(runtime->format);
if (sndif_format < 0) {
ret = to_sndif_format(runtime->format);
if (ret < 0) {
dev_err(&stream->front_info->xb_dev->dev,
"Unsupported sample format: %d\n",
runtime->format);
return sndif_format;
return ret;
}
sndif_format = ret;
ret = xen_snd_front_stream_prepare(&stream->evt_pair->req,
&stream->sh_buf,