From: Wenwei Tao <ww.tao0320@gmail.com>
Date: Thu, 7 Jul 2016 07:54:07 +0000 (+0200)
Subject: lightnvm: break the loop when rqd is not null
X-Git-Tag: v4.8-rc1~161^2~48
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0de2415bb730ee26ce4c90778696d3559f4312c5;p=karo-tx-linux.git

lightnvm: break the loop when rqd is not null

Break the loop when rqd is not null to reduce
an unnecessary schedule.

Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index de86d72dcdf0..736e66968bc6 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -96,10 +96,13 @@ static void rrpc_discard(struct rrpc *rrpc, struct bio *bio)
 	sector_t len = bio->bi_iter.bi_size / RRPC_EXPOSED_PAGE_SIZE;
 	struct nvm_rq *rqd;
 
-	do {
+	while (1) {
 		rqd = rrpc_inflight_laddr_acquire(rrpc, slba, len);
+		if (rqd)
+			break;
+
 		schedule();
-	} while (!rqd);
+	}
 
 	if (IS_ERR(rqd)) {
 		pr_err("rrpc: unable to acquire inflight IO\n");