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Subject[PATCH] ALSA: pcm: potential uninitialized return values
Smatch complains that "tmp" can be uninitialized if we do a zero size
write.

Fixes: 02a5d6925cd3 ("ALSA: pcm: Avoid potential races between OSS ioctls and read/write")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index a9082f219561..40852c595453 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1364,7 +1364,7 @@ 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))
@@ -1474,7 +1474,7 @@ 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))
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