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 2a77071fb7b68df78c3ff41041bf1d7fb330985c..fa780e666911e3ed479695098ef304d833b08ec0 100644 (file)
--- 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;
 }