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From: Jacopo Mondi <jacopo+renesas@jmondi.org>
To: Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	kieran.bingham+renesas@ideasonboard.com,
	laurent.pinchart+renesas@ideasonboard.com,
	niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: [PATCH v5 06/15] media: i2c: max9271: Check max9271_write() return
Date: Wed, 16 Jun 2021 14:46:07 +0200	[thread overview]
Message-ID: <20210616124616.49249-7-jacopo+renesas@jmondi.org> (raw)
In-Reply-To: <20210616124616.49249-1-jacopo+renesas@jmondi.org>

Check the return value of the max9271_write() function in the
max9271 library driver.

While at it, modify an existing condition to be made identical
to other checks.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/i2c/max9271.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

diff --git a/drivers/media/i2c/max9271.c b/drivers/media/i2c/max9271.c
index c495582dcff6..2c7dc7fb9846 100644
--- a/drivers/media/i2c/max9271.c
+++ b/drivers/media/i2c/max9271.c
@@ -106,7 +106,10 @@ int max9271_set_serial_link(struct max9271_device *dev, bool enable)
 	 * Short delays here appear to show bit-errors in the writes following.
 	 * Therefore a conservative delay seems best here.
 	 */
-	max9271_write(dev, 0x04, val);
+	ret = max9271_write(dev, 0x04, val);
+	if (ret < 0)
+		return ret;
+
 	usleep_range(5000, 8000);
 
 	return 0;
@@ -118,7 +121,7 @@ int max9271_configure_i2c(struct max9271_device *dev, u8 i2c_config)
 	int ret;
 
 	ret = max9271_write(dev, 0x0d, i2c_config);
-	if (ret)
+	if (ret < 0)
 		return ret;
 
 	/* The delay required after an I2C bus configuration change is not
@@ -143,7 +146,10 @@ int max9271_set_high_threshold(struct max9271_device *dev, bool enable)
 	 * Enable or disable reverse channel high threshold to increase
 	 * immunity to power supply noise.
 	 */
-	max9271_write(dev, 0x08, enable ? ret | BIT(0) : ret & ~BIT(0));
+	ret = max9271_write(dev, 0x08, enable ? ret | BIT(0) : ret & ~BIT(0));
+	if (ret < 0)
+		return ret;
+
 	usleep_range(2000, 2500);
 
 	return 0;
@@ -152,6 +158,8 @@ EXPORT_SYMBOL_GPL(max9271_set_high_threshold);
 
 int max9271_configure_gmsl_link(struct max9271_device *dev)
 {
+	int ret;
+
 	/*
 	 * Configure the GMSL link:
 	 *
@@ -162,16 +170,24 @@ int max9271_configure_gmsl_link(struct max9271_device *dev)
 	 *
 	 * TODO: Make the GMSL link configuration parametric.
 	 */
-	max9271_write(dev, 0x07, MAX9271_DBL | MAX9271_HVEN |
-		      MAX9271_EDC_1BIT_PARITY);
+	ret = max9271_write(dev, 0x07, MAX9271_DBL | MAX9271_HVEN |
+			    MAX9271_EDC_1BIT_PARITY);
+	if (ret < 0)
+		return ret;
+
 	usleep_range(5000, 8000);
 
 	/*
 	 * Adjust spread spectrum to +4% and auto-detect pixel clock
 	 * and serial link rate.
 	 */
-	max9271_write(dev, 0x02, MAX9271_SPREAD_SPECT_4 | MAX9271_R02_RES |
-		      MAX9271_PCLK_AUTODETECT | MAX9271_SERIAL_AUTODETECT);
+	ret = max9271_write(dev, 0x02,
+			    MAX9271_SPREAD_SPECT_4 | MAX9271_R02_RES |
+			    MAX9271_PCLK_AUTODETECT |
+			    MAX9271_SERIAL_AUTODETECT);
+	if (ret < 0)
+		return ret;
+
 	usleep_range(5000, 8000);
 
 	return 0;
-- 
2.31.1


  parent reply	other threads:[~2021-06-16 12:46 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 12:46 [PATCH v5 00/15] media: gmsl: Reliability improvements Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 01/15] media: i2c: max9286: Adjust parameters indent Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 02/15] media: i2c: max9286: Rename reverse_channel_mv Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 03/15] media: i2c: max9286: Cache channel amplitude Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 04/15] media: i2c: max9286: Define high " Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 05/15] media: i2c: max9286: Rework comments in .bound() Jacopo Mondi
2021-06-16 12:46 ` Jacopo Mondi [this message]
2021-06-16 12:46 ` [PATCH v5 07/15] media: i2c: max9271: Introduce wake_up() function Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 08/15] media: i2c: rdacm21: Add delay after OV490 reset Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 09/15] media: i2c: rdacm21: Fix OV10640 powerup Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 10/15] media: i2c: rdacm21: Power up OV10640 before OV490 Jacopo Mondi
2021-06-16 23:47   ` Kieran Bingham
2021-06-16 12:46 ` [PATCH v5 11/15] media: i2c: rdacm20: Enable noise immunity Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 12/15] media: i2c: rdacm20: Embed 'serializer' field Jacopo Mondi
2021-06-17  0:14   ` Laurent Pinchart
2021-06-17  6:18     ` Hans Verkuil
2021-06-17  7:42       ` Jacopo Mondi
2021-06-17  8:12         ` Hans Verkuil
2021-06-17  8:20           ` Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 13/15] media: i2c: rdacm20: Report camera module name Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 14/15] media: i2c: rdacm20: Check return values Jacopo Mondi
2021-06-16 12:46 ` [PATCH v5 15/15] media: i2c: rdacm20: Re-work ov10635 reset Jacopo Mondi

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