From: Heinz Mauelshagen <heinzm@redhat.com>
Date: Mon, 14 Oct 2013 15:14:45 +0000 (+0200)
Subject: dm cache: log error message if dm_kcopyd_copy() fails
X-Git-Tag: upstream/snapshot3+hdmi~3781^2~34
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2c2263c93f70c6abdce90ad96a854760532aa52f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

dm cache: log error message if dm_kcopyd_copy() fails

A migration failure should be logged (albeit limited).

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---

diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index dc63eb2..05a10c0 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -886,8 +886,10 @@ static void issue_copy_real(struct dm_cache_migration *mg)
 		r = dm_kcopyd_copy(cache->copier, &o_region, 1, &c_region, 0, copy_complete, mg);
 	}
 
-	if (r < 0)
+	if (r < 0) {
+		DMERR_LIMIT("issuing migration failed");
 		migration_failure(mg);
+	}
 }
 
 static void avoid_copy(struct dm_cache_migration *mg)