This is a note to let you know that I've just added the patch titled
media: ov2680: Fix regulators being left enabled on ov2680_power_on() errors
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-ov2680-fix-regulators-being-left-enabled-on-ov.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f6793b72ce97860e5eb5ce4f2e828de58a6806f2
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Thu Aug 3 11:33:23 2023 +0200
media: ov2680: Fix regulators being left enabled on ov2680_power_on() errors
[ Upstream commit 84b4bd7e0d98166aa32fd470e672721190492eae ]
When the ov2680_power_on() "sensor soft reset failed" path is hit during
probe() the WARN() about putting an enabled regulator at
drivers/regulator/core.c:2398 triggers 3 times (once for each regulator),
filling dmesg with backtraces.
Fix this by properly disabling the regulators on ov2680_power_on() errors.
Fixes: 3ee47cad3e69 ("media: ov2680: Add Omnivision OV2680 sensor driver")
Reviewed-by: Daniel Scally <dan.scally@xxxxxxxxxxxxxxxx>
Acked-by: Rui Miguel Silva <rmfrfs@xxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c
index 7fc4b39ebb371..55fc56ffad31c 100644
--- a/drivers/media/i2c/ov2680.c
+++ b/drivers/media/i2c/ov2680.c
@@ -475,7 +475,7 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
ret = ov2680_write_reg(sensor, OV2680_REG_SOFT_RESET, 0x01);
if (ret != 0) {
dev_err(dev, "sensor soft reset failed\n");
- return ret;
+ goto err_disable_regulators;
}
usleep_range(1000, 2000);
} else {
@@ -485,7 +485,7 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
ret = clk_prepare_enable(sensor->xvclk);
if (ret < 0)
- return ret;
+ goto err_disable_regulators;
sensor->is_enabled = true;
@@ -495,6 +495,10 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
ov2680_stream_disable(sensor);
return 0;
+
+err_disable_regulators:
+ regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies);
+ return ret;
}
static int ov2680_s_power(struct v4l2_subdev *sd, int on)
