ALSA: pcm: potential uninitialized return values

Smatch complains that "tmp" can be uninitialized if we do a zero size
write.

Fixes: 02a5d6925c ("ALSA: pcm: Avoid potential races between OSS ioctls and read/write")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Dan Carpenter 2018-03-27 16:07:52 +03:00 committed by Takashi Iwai
parent 9066ae7ff5
commit 5607dddbfc

View File

@ -1326,7 +1326,7 @@ static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const cha
static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
{
size_t xfer = 0;
ssize_t tmp;
ssize_t tmp = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
if (atomic_read(&substream->mmap_count))
@ -1433,7 +1433,7 @@ static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf,
static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
{
size_t xfer = 0;
ssize_t tmp;
ssize_t tmp = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
if (atomic_read(&substream->mmap_count))