linux-kernel - [PATCH] media: pci: use swap() to make code cleaner

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Date:   Thu, 17 Mar 2022 09:34:17 +0800
From:   Haowen Bai <baihaowen@...zu.com>
To:     <mchehab@...nel.org>, <arnd@...db.de>,
        <laurent.pinchart@...asonboard.com>, <hverkuil-cisco@...all.nl>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Haowen Bai <baihaowen@...zu.com>
Subject: [PATCH] media: pci: use swap() to make code cleaner

Use the macro 'swap()' defined in 'include/linux/minmax.h' to avoid
opencoding it.

Signed-off-by: Haowen Bai <baihaowen@...zu.com>
---
 drivers/media/pci/saa7134/saa7134-video.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index 374c8e1..3a0a9ab 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -823,7 +823,7 @@ static int buffer_activate(struct saa7134_dev *dev,
 {
 	struct saa7134_dmaqueue *dmaq = buf->vb2.vb2_buf.vb2_queue->drv_priv;
 	unsigned long base,control,bpl;
-	unsigned long bpl_uv,lines_uv,base2,base3,tmp; /* planar */
+	unsigned long bpl_uv,lines_uv,base2,base3; /* planar */
 
 	video_dbg("buffer_activate buf=%p\n", buf);
 	buf->top_seen = 0;
@@ -868,11 +868,8 @@ static int buffer_activate(struct saa7134_dev *dev,
 		lines_uv = dev->height >> dev->fmt->vshift;
 		base2    = base + bpl * dev->height;
 		base3    = base2 + bpl_uv * lines_uv;
-		if (dev->fmt->uvswap) {
-			tmp = base2;
-			base2 = base3;
-			base3 = tmp;
-		}
+		if (dev->fmt->uvswap)
+			swap(base2, base3);
 		video_dbg("uv: bpl=%ld lines=%ld base2/3=%ld/%ld\n",
 			bpl_uv,lines_uv,base2,base3);
 		if (V4L2_FIELD_HAS_BOTH(dev->field)) {
-- 
2.7.4