| Message ID | 20240816-smatch-clock-v2-1-c63105db07e8@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: Fix last smatch warnings | expand |
Hi Ricardo, Ricardo Ribalda <ribalda@chromium.org> writes: > Factor out all the power off logic, except the clk_disable_unprepare(), > to a new function __ar0521_power_off(). > > This allows ar0521_power_on() to explicitly clean-out the clock during > the error-path. > > The following smatch warning is fixed: > drivers/media/i2c/ar0521.c:912 ar0521_power_on() warn: 'sensor->extclk' from clk_prepare_enable() not released on lines: 912. TBH I don't know if the code with the patch applied is better or not. It if silences the tool, well, sometimes things are not as clear as we want them. Acked-by: Krzysztof Hałasa <khalasa@piap.pl> > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> > --- > drivers/media/i2c/ar0521.c | 17 +++++++++++++---- > 1 file changed, 13 insertions(+), 4 deletions(-) > > diff --git a/drivers/media/i2c/ar0521.c b/drivers/media/i2c/ar0521.c > index 09331cf95c62..56a724b4d47e 100644 > --- a/drivers/media/i2c/ar0521.c > +++ b/drivers/media/i2c/ar0521.c > @@ -835,14 +835,12 @@ static const struct initial_reg { > be(0x0707)), /* 3F44: couple k factor 2 */ > }; > > -static int ar0521_power_off(struct device *dev) > +static void __ar0521_power_off(struct device *dev) > { > struct v4l2_subdev *sd = dev_get_drvdata(dev); > struct ar0521_dev *sensor = to_ar0521_dev(sd); > int i; > > - clk_disable_unprepare(sensor->extclk); > - > if (sensor->reset_gpio) > gpiod_set_value(sensor->reset_gpio, 1); /* assert RESET signal */ > > @@ -850,6 +848,16 @@ static int ar0521_power_off(struct device *dev) > if (sensor->supplies[i]) > regulator_disable(sensor->supplies[i]); > } > +} > + > +static int ar0521_power_off(struct device *dev) > +{ > + struct v4l2_subdev *sd = dev_get_drvdata(dev); > + struct ar0521_dev *sensor = to_ar0521_dev(sd); > + > + clk_disable_unprepare(sensor->extclk); > + __ar0521_power_off(dev); > + > return 0; > } > > @@ -908,7 +916,8 @@ static int ar0521_power_on(struct device *dev) > > return 0; > off: > - ar0521_power_off(dev); > + clk_disable_unprepare(sensor->extclk); > + __ar0521_power_off(dev); > return ret; > } >
diff --git a/drivers/media/i2c/ar0521.c b/drivers/media/i2c/ar0521.c index 09331cf95c62..56a724b4d47e 100644 --- a/drivers/media/i2c/ar0521.c +++ b/drivers/media/i2c/ar0521.c @@ -835,14 +835,12 @@ static const struct initial_reg { be(0x0707)), /* 3F44: couple k factor 2 */ }; -static int ar0521_power_off(struct device *dev) +static void __ar0521_power_off(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ar0521_dev *sensor = to_ar0521_dev(sd); int i; - clk_disable_unprepare(sensor->extclk); - if (sensor->reset_gpio) gpiod_set_value(sensor->reset_gpio, 1); /* assert RESET signal */ @@ -850,6 +848,16 @@ static int ar0521_power_off(struct device *dev) if (sensor->supplies[i]) regulator_disable(sensor->supplies[i]); } +} + +static int ar0521_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ar0521_dev *sensor = to_ar0521_dev(sd); + + clk_disable_unprepare(sensor->extclk); + __ar0521_power_off(dev); + return 0; } @@ -908,7 +916,8 @@ static int ar0521_power_on(struct device *dev) return 0; off: - ar0521_power_off(dev); + clk_disable_unprepare(sensor->extclk); + __ar0521_power_off(dev); return ret; }
Factor out all the power off logic, except the clk_disable_unprepare(), to a new function __ar0521_power_off(). This allows ar0521_power_on() to explicitly clean-out the clock during the error-path. The following smatch warning is fixed: drivers/media/i2c/ar0521.c:912 ar0521_power_on() warn: 'sensor->extclk' from clk_prepare_enable() not released on lines: 912. Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> --- drivers/media/i2c/ar0521.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-)