From: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Date: Thu, 10 Dec 2009 23:52:27 +0000 (+0000)
Subject: dm mpath: reject messages when device is suspended
X-Git-Tag: upstream/snapshot3+hdmi~16136^2~15
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c2f3d24b783fda20618b73d65678eb5dfae31a5d;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

dm mpath: reject messages when device is suspended

This patch rejects messages that can generate I/O while the device
itself is suspended.

Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 45d9bf1..e81345a 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1433,6 +1433,11 @@ static int multipath_message(struct dm_target *ti, unsigned argc, char **argv)
 		goto out;
 	}
 
+	if (dm_suspended(ti)) {
+		r = -EBUSY;
+		goto out;
+	}
+
 	if (argc == 1) {
 		if (!strnicmp(argv[0], MESG_STR("queue_if_no_path"))) {
 			r = queue_if_no_path(m, 1, 0);