From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Tue, 17 Oct 2006 07:09:38 +0000 (-0700)
Subject: [PATCH] md: fix /proc/mdstat refcounting
X-Git-Tag: firefly_0821_release~31522^2~47^2~162
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e24650c2e744f99541125a5b023f0d02cad19d14;p=firefly-linux-kernel-4.4.55.git

[PATCH] md: fix /proc/mdstat refcounting

I have seen mdadm oops after successfully unloading md module.

This patch privents from unloading md module while
mdadm is polling /proc/mdstat.

Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Akinbou Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 57fa64f93e5f..f7f19088f3be 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4912,6 +4912,7 @@ static unsigned int mdstat_poll(struct file *filp, poll_table *wait)
 }
 
 static struct file_operations md_seq_fops = {
+	.owner		= THIS_MODULE,
 	.open           = md_seq_open,
 	.read           = seq_read,
 	.llseek         = seq_lseek,