From 8789d45536081ab667865ccc14b10628c7fadbf3 Mon Sep 17 00:00:00 2001
From: Hongchao Zhang <hongchao.zhang@intel.com>
Date: Tue, 22 Aug 2017 17:13:38 -0400
Subject: [PATCH] LU-8066 libcfs: call kernel_param_unlock on error

In libcfs_param_debug_mb_set, kerenl_param_unlock should be
called in case of an error.

Change-Id: Iafeeb21b2d891f4ed7432e4d1ddd3c383fe33d5a
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: https://review.whamcloud.com/28612
Tested-by: Jenkins
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
---
 libcfs/libcfs/debug.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libcfs/libcfs/debug.c b/libcfs/libcfs/debug.c
index 02af6fa..999eec4 100644
--- a/libcfs/libcfs/debug.c
+++ b/libcfs/libcfs/debug.c
@@ -73,6 +73,10 @@ static int libcfs_param_debug_mb_set(const char *val,
 #endif
 	if (!*((unsigned int *)kp->arg)) {
 		*((unsigned int *)kp->arg) = num;
+
+#if !defined(HAVE_MODULE_PARAM_LOCKING) && !defined(HAVE_KERNEL_PARAM_LOCK)
+		kernel_param_unlock(THIS_MODULE);
+#endif
 		return 0;
 	}
 
-- 
1.8.3.1