tun: fasync BKL pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index ce5af2a..4c0c597 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -782,18 +782,21 @@
DBG(KERN_INFO "%s: tun_chr_fasync %d\n", tun->dev->name, on);
+ lock_kernel();
if ((ret = fasync_helper(fd, file, on, &tun->fasync)) < 0)
- return ret;
+ goto out;
if (on) {
ret = __f_setown(file, task_pid(current), PIDTYPE_PID, 0);
if (ret)
- return ret;
+ goto out;
tun->flags |= TUN_FASYNC;
} else
tun->flags &= ~TUN_FASYNC;
-
- return 0;
+ ret = 0;
+out:
+ unlock_kernel();
+ return ret;
}
static int tun_chr_open(struct inode *inode, struct file * file)
