linux-kernel - [RESEND PATCH 08/25] media: i2c: ad5820: simplify getting state container

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Message-Id: <20201029164239.84240-8-krzk@kernel.org>
Date:   Thu, 29 Oct 2020 17:42:22 +0100
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>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzk@...nel.org>
Subject: [RESEND PATCH 08/25] media: i2c: ad5820: 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/ad5820.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/ad5820.c b/drivers/media/i2c/ad5820.c
index 19c74db0649f..2958a4694461 100644
--- a/drivers/media/i2c/ad5820.c
+++ b/drivers/media/i2c/ad5820.c
@@ -270,8 +270,7 @@ static const struct v4l2_subdev_internal_ops ad5820_internal_ops = {
  */
 static int __maybe_unused ad5820_suspend(struct device *dev)
 {
-	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
-	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct v4l2_subdev *subdev = dev_get_drvdata(dev);
 	struct ad5820_device *coil = to_ad5820_device(subdev);
 
 	if (!coil->power_count)
@@ -282,8 +281,7 @@ static int __maybe_unused ad5820_suspend(struct device *dev)
 
 static int __maybe_unused ad5820_resume(struct device *dev)
 {
-	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
-	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct v4l2_subdev *subdev = dev_get_drvdata(dev);
 	struct ad5820_device *coil = to_ad5820_device(subdev);
 
 	if (!coil->power_count)
-- 
2.25.1