linux-kernel - [PATCH 3/4] media: i2c: ov4689: Refactor ov4689_s

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240616202433.227895-4-mike.rudenko@gmail.com>
Date: Sun, 16 Jun 2024 23:24:32 +0300
From: Mikhail Rudenko <mike.rudenko@...il.com>
To: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Jacopo Mondi <jacopo@...ndi.org>,
	Tommaso Merciai <tomm.merciai@...il.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Dave Stevenson <dave.stevenson@...pberrypi.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Mikhail Rudenko <mike.rudenko@...il.com>
Subject: [PATCH 3/4] media: i2c: ov4689: Refactor ov4689_s_stream

Split ov4689_s_stream into ov4689_stream_on and ov4689_stream_off
functions. Also remove repetitive pm_runtime_put calls and call
pm_runtime_put once at the end of the ov4689_stream_on function if any
error occurred.

Signed-off-by: Mikhail Rudenko <mike.rudenko@...il.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
 drivers/media/i2c/ov4689.c | 100 ++++++++++++++++++++-----------------
 1 file changed, 53 insertions(+), 47 deletions(-)

diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
index affc6e3d5467..c4c7c462672a 100644
--- a/drivers/media/i2c/ov4689.c
+++ b/drivers/media/i2c/ov4689.c
@@ -537,61 +537,67 @@ static int ov4689_setup_blc_anchors(struct ov4689 *ov4689,
 	return ret;
 }
 
+static int ov4689_stream_on(struct ov4689 *ov4689,
+			    struct v4l2_subdev_state *sd_state)
+{
+	int ret;
+
+	ret = pm_runtime_resume_and_get(ov4689->dev);
+	if (ret < 0)
+		return ret;
+
+	ret = cci_multi_reg_write(ov4689->regmap, ov4689_common_regs,
+				  ARRAY_SIZE(ov4689_common_regs), NULL);
+	if (ret)
+		goto error;
+
+	ret = ov4689_setup_timings(ov4689, sd_state);
+	if (ret)
+		goto error;
+
+	ret = ov4689_setup_blc_anchors(ov4689, sd_state);
+	if (ret)
+		goto error;
+
+	ret = __v4l2_ctrl_handler_setup(&ov4689->ctrl_handler);
+	if (ret)
+		goto error;
+
+	ret = cci_write(ov4689->regmap, OV4689_REG_CTRL_MODE,
+			OV4689_MODE_STREAMING, NULL);
+	if (ret)
+		goto error;
+
+	return 0;
+
+error:
+	pm_runtime_put(ov4689->dev);
+	return ret;
+}
+
+static int ov4689_stream_off(struct ov4689 *ov4689)
+{
+	cci_write(ov4689->regmap, OV4689_REG_CTRL_MODE, OV4689_MODE_SW_STANDBY,
+		  NULL);
+	pm_runtime_mark_last_busy(ov4689->dev);
+	pm_runtime_put_autosuspend(ov4689->dev);
+
+	return 0;
+}
+
 static int ov4689_s_stream(struct v4l2_subdev *sd, int on)
 {
 	struct ov4689 *ov4689 = to_ov4689(sd);
 	struct v4l2_subdev_state *sd_state;
-	struct device *dev = ov4689->dev;
-	int ret = 0;
+	int ret;
 
 	sd_state = v4l2_subdev_lock_and_get_active_state(&ov4689->subdev);
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(dev);
-		if (ret < 0)
-			goto unlock_and_return;
-
-		ret = cci_multi_reg_write(ov4689->regmap,
-					  ov4689_common_regs,
-					  ARRAY_SIZE(ov4689_common_regs),
-					  NULL);
-		if (ret) {
-			pm_runtime_put(dev);
-			goto unlock_and_return;
-		}
-
-		ret = ov4689_setup_timings(ov4689, sd_state);
-		if (ret) {
-			pm_runtime_put(dev);
-			goto unlock_and_return;
-		}
-
-		ret = ov4689_setup_blc_anchors(ov4689, sd_state);
-		if (ret) {
-			pm_runtime_put(dev);
-			goto unlock_and_return;
-		}
-
-		ret = __v4l2_ctrl_handler_setup(&ov4689->ctrl_handler);
-		if (ret) {
-			pm_runtime_put(dev);
-			goto unlock_and_return;
-		}
-
-		ret = cci_write(ov4689->regmap, OV4689_REG_CTRL_MODE,
-				OV4689_MODE_STREAMING, NULL);
-		if (ret) {
-			pm_runtime_put(dev);
-			goto unlock_and_return;
-		}
-	} else {
-		cci_write(ov4689->regmap, OV4689_REG_CTRL_MODE,
-			  OV4689_MODE_SW_STANDBY, NULL);
-		pm_runtime_mark_last_busy(dev);
-		pm_runtime_put_autosuspend(dev);
-	}
+	if (on)
+		ret = ov4689_stream_on(ov4689, sd_state);
+	else
+		ret = ov4689_stream_off(ov4689);
 
-unlock_and_return:
 	v4l2_subdev_unlock_state(sd_state);
 
 	return ret;
-- 
2.45.2