From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Tue, 16 Feb 2016 21:58:36 +0000 (-0500)
Subject: Manage.c: Only issue change events for kernels older than 2.6.28
X-Git-Tag: mdadm-4.0~133
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=229e66cb9689ef20014ff8e5423316b19bfe6a11;p=thirdparty%2Fmdadm.git

Manage.c: Only issue change events for kernels older than 2.6.28

2.6.28+ kernels handle this themselves and issuing the event here can
cause a race.

Reported-by: Sebastian Parschauer <sebastian.riemer@profitbricks.com>
Suggested-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---

diff --git a/Manage.c b/Manage.c
index 7e1b94be..eae96e1c 100644
--- a/Manage.c
+++ b/Manage.c
@@ -493,14 +493,17 @@ done:
 		rv = 1;
 		goto out;
 	}
-	/* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
-	 * was stopped, so We'll do it here just to be sure.  Drop any
-	 * partitions as well...
-	 */
-	if (fd >= 0)
-		ioctl(fd, BLKRRPART, 0);
-	if (mdi)
-		sysfs_uevent(mdi, "change");
+
+	if (get_linux_version() < 2006028) {
+		/* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
+		 * was stopped, so We'll do it here just to be sure.  Drop any
+		 * partitions as well...
+		 */
+		if (fd >= 0)
+			ioctl(fd, BLKRRPART, 0);
+		if (mdi)
+			sysfs_uevent(mdi, "change");
+	}
 
 	if (devnm[0] && use_udev()) {
 		struct map_ent *mp = map_by_devnm(&map, devnm);