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-rw-r--r--sound/core/seq/seq_clientmgr.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 933bde3843d9..976404691261 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -2340,14 +2340,19 @@ int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
{
const struct ioctl_handler *handler;
struct snd_seq_client *client;
+ int err;
client = clientptr(clientid);
if (client == NULL)
return -ENXIO;
for (handler = ioctl_handlers; handler->cmd > 0; ++handler) {
- if (handler->cmd == cmd)
- return handler->func(client, arg);
+ if (handler->cmd == cmd) {
+ mutex_lock(&client->ioctl_mutex);
+ err = handler->func(client, arg);
+ mutex_unlock(&client->ioctl_mutex);
+ return err;
+ }
}
pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n",