From e6493c81f35b562327c3fe5911471f101a0c2f94 Mon Sep 17 00:00:00 2001
From: Jin Yu <jin.yu@intel.com>
Date: Fri, 15 Jan 2021 20:11:48 +0800
Subject: [PATCH] bdev: improve bdev blockcnt notify

A small improvement in blockcnt change.
If size == bdev->blockcnt just return.

Change-Id: I507a3e5d5fa0f3f17383afa08c47c0bda48be52c
Signed-off-by: Jin Yu <jin.yu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5922
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
---
 lib/bdev/bdev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/bdev/bdev.c b/lib/bdev/bdev.c
index f90f4bdeb..f9d145983 100644
--- a/lib/bdev/bdev.c
+++ b/lib/bdev/bdev.c
@@ -3450,6 +3450,10 @@ spdk_bdev_notify_blockcnt_change(struct spdk_bdev *bdev, uint64_t size)
 	struct spdk_bdev_desc *desc;
 	int ret;
 
+	if (size == bdev->blockcnt) {
+		return 0;
+	}
+
 	pthread_mutex_lock(&bdev->internal.mutex);
 
 	/* bdev has open descriptors */