i2o: fasync BKL pushdown
This driver appears to really need the BKL to protect open_files.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index 95b4c10..4238de9 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -1084,15 +1084,17 @@
{
ulong id = (ulong) fp->private_data;
struct i2o_cfg_info *p;
+ int ret = -EBADF;
+ lock_kernel();
for (p = open_files; p; p = p->next)
if (p->q_id == id)
break;
- if (!p)
- return -EBADF;
-
- return fasync_helper(fd, fp, on, &p->fasync);
+ if (p)
+ ret = fasync_helper(fd, fp, on, &p->fasync);
+ unlock_kernel();
+ return ret;
}
static int cfg_release(struct inode *inode, struct file *file)