6.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans de Goede hdegoede@redhat.com
[ 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@ideasonboard.com Acked-by: Rui Miguel Silva rmfrfs@gmail.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/i2c/ov2680.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c index a24344ef9852c..8943e4e78a0df 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)