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Subject: media: ov8865: Disable only enabled regulators on error path Author: Sakari Ailus sakari.ailus@linux.intel.com Date: Wed Dec 15 09:38:48 2021 +0100

If powering on the sensor failed, the entire power-off sequence was run independently of how far the power-on sequence proceeded before the error. This lead to disabling regulators and/or clock that was not enabled.

Fix this by disabling only clocks and regulators that were enabled previously.

Fixes: 11c0d8fdccc5 ("media: i2c: Add support for the OV8865 image sensor") Cc: stable@vger.kernel.org Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org

drivers/media/i2c/ov8865.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)

---

diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c index ebdb20d3fe9d..d9d016cfa9ac 100644 --- a/drivers/media/i2c/ov8865.c +++ b/drivers/media/i2c/ov8865.c @@ -2407,27 +2407,27 @@ static int ov8865_sensor_power(struct ov8865_sensor *sensor, bool on) if (ret) { dev_err(sensor->dev, "failed to enable DOVDD regulator\n"); - goto disable; + return ret; }

ret = regulator_enable(sensor->avdd); if (ret) { dev_err(sensor->dev, "failed to enable AVDD regulator\n"); - goto disable; + goto disable_dovdd; }

ret = regulator_enable(sensor->dvdd); if (ret) { dev_err(sensor->dev, "failed to enable DVDD regulator\n"); - goto disable; + goto disable_avdd; }

ret = clk_prepare_enable(sensor->extclk); if (ret) { dev_err(sensor->dev, "failed to enable EXTCLK clock\n"); - goto disable; + goto disable_dvdd; }

gpiod_set_value_cansleep(sensor->reset, 0); @@ -2436,14 +2436,16 @@ static int ov8865_sensor_power(struct ov8865_sensor *sensor, bool on) /* Time to enter streaming mode according to power timings. */ usleep_range(10000, 12000); } else { -disable: gpiod_set_value_cansleep(sensor->powerdown, 1); gpiod_set_value_cansleep(sensor->reset, 1);

clk_disable_unprepare(sensor->extclk);

+disable_dvdd: regulator_disable(sensor->dvdd); +disable_avdd: regulator_disable(sensor->avdd); +disable_dovdd: regulator_disable(sensor->dovdd); }