From: Jonathan Corbet <corbet@lwn.net>
Date: Mon, 23 Jun 2008 23:00:14 +0000 (-0600)
Subject: ipmi: fasync BKL pushdown
X-Git-Tag: firefly_0821_release~19698^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=70b028b7ea94f1b36c61f3ee1c921cc3a87812e6;p=firefly-linux-kernel-4.4.55.git

ipmi: fasync BKL pushdown

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

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

diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index c816656d6bfb..c11a40483459 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -101,7 +101,9 @@ static int ipmi_fasync(int fd, struct file *file, int on)
 	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);
 }