commit 70b028b7ea94f1b36c61f3ee1c921cc3a87812e6
author Jonathan Corbet <corbet@lwn.net> Mon Jun 23 17:00:14 2008 -0600
committer Jonathan Corbet <corbet@lwn.net> Wed Jul 02 15:06:28 2008 -0600
tree 1d21a2e4f2e2434a16f1d7b31649f6954f74140b
parent dda6445e219b5d1fd67e9426ce8d23f8fbfaaf66

ipmi: fasync BKL pushdown

This driver really needs it to avoid races against open()

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

drivers/char/ipmi/ipmi_devintf.c

diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index c816656..c11a404 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -101,7 +101,9 @@
 	struct ipmi_file_private *priv = file->private_data;
 	int                      result;
 
+	lock_kernel(); /* could race against open() otherwise */
 	result = fasync_helper(fd, file, on, &priv->fasync_queue);
+	unlock_kernel();
 
 	return (result);
 }