Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 041/846] media: ov8865: Disable only enabled regulators on error path | Date | Mon, 24 Jan 2022 19:32:38 +0100 |
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From: Sakari Ailus <sakari.ailus@linux.intel.com>
commit cbe0b3af73bf72fad197756f026084404e2bcdc7 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/media/i2c/ov8865.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
--- a/drivers/media/i2c/ov8865.c +++ b/drivers/media/i2c/ov8865.c @@ -2330,27 +2330,27 @@ static int ov8865_sensor_power(struct ov 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); @@ -2359,14 +2359,16 @@ static int ov8865_sensor_power(struct ov /* 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); }
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