i2o: fasync BKL pushdown

This driver appears to really need the BKL to protect open_files.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index 95b4c108585c..4238de98d4a6 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -1084,15 +1084,17 @@ static int cfg_fasync(int fd, struct file *fp, int on)
 {
         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)