linux-kernel - [PATCH 22/25] media: i2c: ov7740: simplify getting state container

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Message-Id: <20200921162342.7348-22-krzk@kernel.org>
Date:   Mon, 21 Sep 2020 18:23:39 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Pavel Machek <pavel@....cz>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Tianshu Qiu <tian.shu.qiu@...el.com>,
        Dongchun Zhu <dongchun.zhu@...iatek.com>,
        Shawn Tu <shawnx.tu@...el.com>,
        Ricardo Ribalda <ribalda@...nel.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Bingbu Cao <bingbu.cao@...el.com>,
        Rui Miguel Silva <rmfrfs@...il.com>,
        Shunqian Zheng <zhengsq@...k-chips.com>,
        Chiranjeevi Rapolu <chiranjeevi.rapolu@...el.com>,
        Hyungwoo Yang <hyungwoo.yang@...el.com>,
        Wenyou Yang <wenyou.yang@...rochip.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Marco Felsch <m.felsch@...gutronix.de>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH 22/25] media: i2c: ov7740: simplify getting state container

The pointer to 'struct v4l2_subdev' is stored in drvdata via
v4l2_i2c_subdev_init() so there is no point of a dance like:

    struct i2c_client *client = to_i2c_client(struct device *dev)
    struct v4l2_subdev *sd = i2c_get_clientdata(client);

This allows to remove local variable 'client' and few pointer
dereferences.

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
---
 drivers/media/i2c/ov7740.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/ov7740.c b/drivers/media/i2c/ov7740.c
index 5832461c032d..47a9003d29d6 100644
--- a/drivers/media/i2c/ov7740.c
+++ b/drivers/media/i2c/ov7740.c
@@ -1176,8 +1176,7 @@ static int ov7740_remove(struct i2c_client *client)
 
 static int __maybe_unused ov7740_runtime_suspend(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
 
 	ov7740_set_power(ov7740, 0);
@@ -1187,8 +1186,7 @@ static int __maybe_unused ov7740_runtime_suspend(struct device *dev)
 
 static int __maybe_unused ov7740_runtime_resume(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
 
 	return ov7740_set_power(ov7740, 1);
-- 
2.17.1