Hi,
On May 28 2018 06:32, Colin King wrote:
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
---
sound/xen/xen_snd_front_alsa.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/sound/xen/xen_snd_front_alsa.c b/sound/xen/xen_snd_front_alsa.c
index 5041f83e98d2..5a2bd70a2fa1 100644
--- a/sound/xen/xen_snd_front_alsa.c
+++ b/sound/xen/xen_snd_front_alsa.c
@@ -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,
Indeed. A typical assignment mistake. Instead, we could change the type
of 'sndif_format' to signed int, however in this case it's not the same
as the third argument of xen_snd_front_stream_prepare() because it is
'u8'. This patch looks good to me.
Reviewed-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxxx>
Regards
Takashi Sakamoto
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