[PATCH] [v2] extcon: arizona: Fix runtime PM imbalance on error

[Dinghao Liu]

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....@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;
 }
 
-- 
2.17.1