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SubjectRe: [PATCH] [v2] extcon: arizona: Fix runtime PM imbalance on error
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Hi Dinghao Liu,

On 5/23/20 3:17 PM, Dinghao Liu wrote:
> When arizona_request_irq() returns an error code, a
> pairing runtime PM usage counter decrement is needed
> to keep the counter balanced. For error paths after
> this function, things are the same.
>
> Also, remove calls to pm_runtime_disable() when
> pm_runtime_enable() has not been executed.
>
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>
> Changelog:
>
> v2: - Add a new label "err_pm" to balance refcount.
> Remove 3 calls to pm_runtime_disable().
> Move pm_runtime_put() from the front of
> input_register_device() to the back.
> ---
> drivers/extcon/extcon-arizona.c | 17 +++++++++--------
> 1 file changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
> index 7401733db08b..aae82db542a5 100644
> --- a/drivers/extcon/extcon-arizona.c
> +++ b/drivers/extcon/extcon-arizona.c
> @@ -1460,7 +1460,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
> if (!info->input) {
> dev_err(arizona->dev, "Can't allocate input dev\n");
> ret = -ENOMEM;
> - goto err_register;
> + return ret;
> }
>
> info->input->name = "Headset";
> @@ -1492,7 +1492,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
> if (ret != 0) {
> dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
> pdata->micd_pol_gpio, ret);
> - goto err_register;
> + return ret;
> }
>
> info->micd_pol_gpio = gpio_to_desc(pdata->micd_pol_gpio);
> @@ -1515,7 +1515,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
> dev_err(arizona->dev,
> "Failed to get microphone polarity GPIO: %d\n",
> ret);
> - goto err_register;
> + return ret;
> }
> }
>
> @@ -1672,7 +1672,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
> if (ret != 0) {
> dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
> ret);
> - goto err_gpio;
> + goto err_pm;
> }
>
> ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
> @@ -1721,14 +1721,14 @@ static int arizona_extcon_probe(struct platform_device *pdev)
> dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
> ret);
>
> - pm_runtime_put(&pdev->dev);
> -
> ret = input_register_device(info->input);
> if (ret) {
> dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
> goto err_hpdet;
> }
>
> + pm_runtime_put(&pdev->dev);
> +
> return 0;
>
> err_hpdet:
> @@ -1743,10 +1743,11 @@ static int arizona_extcon_probe(struct platform_device *pdev)
> arizona_set_irq_wake(arizona, jack_irq_rise, 0);
> err_rise:
> arizona_free_irq(arizona, jack_irq_rise, info);
> +err_pm:
> + pm_runtime_put(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> err_gpio:
> gpiod_put(info->micd_pol_gpio);
> -err_register:
> - pm_runtime_disable(&pdev->dev);
> return ret;
> }
>
>

Applied it. Thanks.

--
Best Regards,
Chanwoo Choi
Samsung Electronics

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