From: Steven Whitehouse <swhiteho@redhat.com>
Date: Tue, 26 Jul 2011 08:15:45 +0000 (+0100)
Subject: GFS2: Fix mount hang caused by certain access pattern to sysfs files
X-Git-Tag: v3.0.1~7
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=52880922de44a7950283451b06db5aec0fc34a99;p=users%2Fjedix%2Flinux-maple.git

GFS2: Fix mount hang caused by certain access pattern to sysfs files

commit 19237039919088781b4191a00bdc1284d8fea1dd upstream.

Depending upon the order of userspace/kernel during the
mount process, this can result in a hang without the
_all version of the completion.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 2a77071fb7b68..fa780e666911e 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1018,13 +1018,13 @@ hostdata_error:
 		fsname++;
 	if (lm->lm_mount == NULL) {
 		fs_info(sdp, "Now mounting FS...\n");
-		complete(&sdp->sd_locking_init);
+		complete_all(&sdp->sd_locking_init);
 		return 0;
 	}
 	ret = lm->lm_mount(sdp, fsname);
 	if (ret == 0)
 		fs_info(sdp, "Joined cluster. Now mounting FS...\n");
-	complete(&sdp->sd_locking_init);
+	complete_all(&sdp->sd_locking_init);
 	return ret;
 }