From: Kunhoon Baik <knhoon.baik@samsung.com>
Date: Wed, 23 Nov 2016 08:42:32 +0000 (+0900)
Subject: Potential Bug Fix : Checking NULL
X-Git-Tag: accepted/tizen/3.0/common/20161129.103342~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a85c924f1bc605864ee67af2d21f7b3c7bf1b786;p=platform%2Fcore%2Fsystem%2Fdeviced.git

Potential Bug Fix : Checking NULL

Change-Id: Id9c6bbdfe2d64933495a6d8a91080270543a916c
---

diff --git a/src/block/block.c b/src/block/block.c
index d88bad3..fd399aa 100644
--- a/src/block/block.c
+++ b/src/block/block.c
@@ -1664,8 +1664,15 @@ static void trigger_operation(struct block_device *bdev, dd_list *queue, struct
 		block_send_dbus_reply(op->msg, ret);
 
 		queue = bdev->op_queue;
-		queue = DD_LIST_NEXT(queue);
-		op = DD_LIST_NTH(queue, 0);
+		if(queue != NULL) {
+			queue = DD_LIST_NEXT(queue);
+			if(queue != NULL)
+				op = DD_LIST_NTH(queue, 0);
+			else
+				op = NULL;
+		}else
+			op = NULL;
+
 		remove_operation(bdev);
 
 		pthread_mutex_unlock(&(th_manager[thread_id].mutex));