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-rw-r--r--sound/core/pcm_native.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 61f5d42..c49b9d9 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -22,6 +22,7 @@
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/time.h>
#include <linux/pm_qos_params.h>
#include <linux/uio.h>
@@ -3249,14 +3250,17 @@ static int snd_pcm_fasync(int fd, struct file * file, int on)
struct snd_pcm_file * pcm_file;
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
- int err;
+ int err = -ENXIO;
+ lock_kernel();
pcm_file = file->private_data;
substream = pcm_file->substream;
- snd_assert(substream != NULL, return -ENXIO);
+ snd_assert(substream != NULL, goto out);
runtime = substream->runtime;
err = fasync_helper(fd, file, on, &runtime->fasync);
+out:
+ unlock_kernel();
if (err < 0)
return err;
return 0;
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