ALSA: pcm: potential uninitialized return values
Smatch complains that "tmp" can be uninitialized if we do a zero size write. Fixes: 02a5d692 ("ALSA: pcm: Avoid potential races between OSS ioctls and read/write") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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