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Subject: drbd-tools: only rmmod if DRBD is a module

Account for the case if the DRBD drive is built into
the kernel. Otherwise, errors, like the following,
will occur:

root@localhost:~# /etc/init.d/drbd stop
    Stopping all DRBD resources: ERROR: Module drbd 
    does not exist in /proc/modules

Upstream-Status: Submitted [https://github.com/LINBIT/drbd-utils/pull/2]

Signed-off-by: Aws Ismail <aws.ismail@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

[ refresh to 8.4.4: squash Aws' and Jason's patches ]
Signed-off-by: Michel Thebeau <michel.thebeau@windriver.com>

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Changqing Li <changqing.li@windriver.com>

---
 scripts/drbd | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/drbd b/scripts/drbd
index 20bf628..de589dc 100755
--- a/scripts/drbd
+++ b/scripts/drbd
@@ -241,7 +241,9 @@ case "$1" in
 		if [ -d /sys/module/drbd/holders ]; then
 			(cd /sys/module/drbd/holders; for tr in *; do [ -d ${tr} ] && ${RMMOD} ${tr}; done)
 		fi
-		$RMMOD drbd && break
+		if [ ! -z "$(cat /proc/modules | grep -w drbd)" ]; then
+			$RMMOD drbd && break
+		fi
 	    fi
 	done
 	run_hook stop
-- 
1.9.1

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