linux-kernel - [PATCH -next v2] drm/nouveau/fifo: use list_move instead of list_del/list

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Message-ID: <20210609070534.1324550-1-libaokun1@huawei.com>
Date:   Wed, 9 Jun 2021 15:05:34 +0800
From:   Baokun Li <libaokun1@...wei.com>
To:     <linux-kernel@...r.kernel.org>, Ben Skeggs <bskeggs@...hat.com>,
        "David Airlie" <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Lyude Paul <lyude@...hat.com>
CC:     <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>,
        <yangjihong1@...wei.com>, <yukuai3@...wei.com>,
        <libaokun1@...wei.com>, <dri-devel@...ts.freedesktop.org>,
        <nouveau@...ts.freedesktop.org>, <kernel-janitors@...r.kernel.org>,
        Hulk Robot <hulkci@...wei.com>
Subject: [PATCH -next v2] drm/nouveau/fifo: use list_move instead of list_del/list_add in base.c

Using list_move() instead of list_del() + list_add() in base.c.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Baokun Li <libaokun1@...wei.com>
---
V1->V2:
	CC mailist

 drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
index 2ed4ff05d207..1802ac78b78f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
@@ -79,8 +79,7 @@ nvkm_fifo_chan_inst_locked(struct nvkm_fifo *fifo, u64 inst)
 	struct nvkm_fifo_chan *chan;
 	list_for_each_entry(chan, &fifo->chan, head) {
 		if (chan->inst->addr == inst) {
-			list_del(&chan->head);
-			list_add(&chan->head, &fifo->chan);
+			list_move(&chan->head, &fifo->chan);
 			return chan;
 		}
 	}
@@ -109,8 +108,7 @@ nvkm_fifo_chan_chid(struct nvkm_fifo *fifo, int chid, unsigned long *rflags)
 	spin_lock_irqsave(&fifo->lock, flags);
 	list_for_each_entry(chan, &fifo->chan, head) {
 		if (chan->chid == chid) {
-			list_del(&chan->head);
-			list_add(&chan->head, &fifo->chan);
+			list_move(&chan->head, &fifo->chan);
 			*rflags = flags;
 			return chan;
 		}