From: Jonathan Corbet <corbet@lwn.net>
Date: Thu, 19 Jun 2008 21:44:57 +0000 (-0600)
Subject: i2o: fasync BKL pushdown
X-Git-Tag: v2.6.27-rc1~1103^2~11
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=743115ee05f09f356d86763316acf627a7f5a6b3;p=linux-2.6-omap-h63xx.git

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 95b4c108585..4238de98d4a 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)