linux-kernel - [PATCH] media: imx: imx8mq-mipi

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Message-Id: <20220128133649.1393201-1-usama.anjum@collabora.com>
Date:   Fri, 28 Jan 2022 18:36:49 +0500
From:   Muhammad Usama Anjum <usama.anjum@...labora.com>
To:     Steve Longerbeam <slongerbeam@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Martin Kepplinger <martink@...teo.de>,
        Hans Verkuil <hverkuil-cisco@...all.nl>
Cc:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        kernel@...labora.com, kernel-janitors@...r.kernel.org,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: imx: imx8mq-mipi_csi2: Remove unneeded code

ret is constant in imx8mq_mipi_csi_pm_suspend(). This function cannot
return error. Remove the return variable. Simplify other functions which
are using this function.

Fixes: f0c2ba1ed4ad ("media: imx: imx8mq-mipi_csi2: fix system resume")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
---
 drivers/staging/media/imx/imx8mq-mipi-csi2.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/media/imx/imx8mq-mipi-csi2.c b/drivers/staging/media/imx/imx8mq-mipi-csi2.c
index 3b9fa75efac6b..c992b845e63d1 100644
--- a/drivers/staging/media/imx/imx8mq-mipi-csi2.c
+++ b/drivers/staging/media/imx/imx8mq-mipi-csi2.c
@@ -693,11 +693,10 @@ static int imx8mq_mipi_csi_async_register(struct csi_state *state)
  * Suspend/resume
  */
 
-static int imx8mq_mipi_csi_pm_suspend(struct device *dev)
+static void imx8mq_mipi_csi_pm_suspend(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct csi_state *state = mipi_sd_to_csi2_state(sd);
-	int ret = 0;
 
 	mutex_lock(&state->lock);
 
@@ -708,8 +707,6 @@ static int imx8mq_mipi_csi_pm_suspend(struct device *dev)
 	}
 
 	mutex_unlock(&state->lock);
-
-	return ret ? -EAGAIN : 0;
 }
 
 static int imx8mq_mipi_csi_pm_resume(struct device *dev)
@@ -742,15 +739,12 @@ static int __maybe_unused imx8mq_mipi_csi_suspend(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct csi_state *state = mipi_sd_to_csi2_state(sd);
-	int ret;
 
-	ret = imx8mq_mipi_csi_pm_suspend(dev);
-	if (ret)
-		return ret;
+	imx8mq_mipi_csi_pm_suspend(dev);
 
 	state->state |= ST_SUSPENDED;
 
-	return ret;
+	return 0;
 }
 
 static int __maybe_unused imx8mq_mipi_csi_resume(struct device *dev)
@@ -770,9 +764,7 @@ static int __maybe_unused imx8mq_mipi_csi_runtime_suspend(struct device *dev)
 	struct csi_state *state = mipi_sd_to_csi2_state(sd);
 	int ret;
 
-	ret = imx8mq_mipi_csi_pm_suspend(dev);
-	if (ret)
-		return ret;
+	imx8mq_mipi_csi_pm_suspend(dev);
 
 	ret = icc_set_bw(state->icc_path, 0, 0);
 	if (ret)
-- 
2.30.2