1 files changed, 2 insertions, 0 deletions

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 0a1798eafb0b..d4460f18e76c 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1895,7 +1895,9 @@ static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsig
 
 static int snd_pcm_oss_nonblock(struct file * file)
 {
+        spin_lock(&file->f_lock);
         file->f_flags |= O_NONBLOCK;
+        spin_unlock(&file->f_lock);
         return 0;
 }