From: Hans de Goede <hdegoede@xxxxxxxxxx> commit 81a36d8ce554b82b0a08e2b95d0bd44fcbff339b upstream. elan_disable_power() is called conditionally on suspend, where as elan_enable_power() is always called on resume. This leads to an imbalance in the regulator's enable count. Move the regulator_[en|dis]able() calls out of elan_[en|dis]able_power() in preparation of fixing this. No functional changes intended. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220131135436.29638-1-hdegoede@xxxxxxxxxx [dtor: consolidate elan_[en|dis]able() into elan_set_power()] Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/input/mouse/elan_i2c_core.c | 62 ++++++++++++------------------------ 1 file changed, 22 insertions(+), 40 deletions(-) --- a/drivers/input/mouse/elan_i2c_core.c +++ b/drivers/input/mouse/elan_i2c_core.c @@ -132,55 +132,21 @@ static int elan_get_fwinfo(u8 iap_versio return 0; } -static int elan_enable_power(struct elan_tp_data *data) +static int elan_set_power(struct elan_tp_data *data, bool on) { int repeat = ETP_RETRY_COUNT; int error; - error = regulator_enable(data->vcc); - if (error) { - dev_err(&data->client->dev, - "failed to enable regulator: %d\n", error); - return error; - } - do { - error = data->ops->power_control(data->client, true); + error = data->ops->power_control(data->client, on); if (error >= 0) return 0; msleep(30); } while (--repeat > 0); - dev_err(&data->client->dev, "failed to enable power: %d\n", error); - return error; -} - -static int elan_disable_power(struct elan_tp_data *data) -{ - int repeat = ETP_RETRY_COUNT; - int error; - - do { - error = data->ops->power_control(data->client, false); - if (!error) { - error = regulator_disable(data->vcc); - if (error) { - dev_err(&data->client->dev, - "failed to disable regulator: %d\n", - error); - /* Attempt to power the chip back up */ - data->ops->power_control(data->client, true); - break; - } - - return 0; - } - - msleep(30); - } while (--repeat > 0); - - dev_err(&data->client->dev, "failed to disable power: %d\n", error); + dev_err(&data->client->dev, "failed to set power %s: %d\n", + on ? "on" : "off", error); return error; } @@ -1195,9 +1161,19 @@ static int __maybe_unused elan_suspend(s /* Enable wake from IRQ */ data->irq_wake = (enable_irq_wake(client->irq) == 0); } else { - ret = elan_disable_power(data); + ret = elan_set_power(data, false); + if (ret) + goto err; + + ret = regulator_disable(data->vcc); + if (ret) { + dev_err(dev, "error %d disabling regulator\n", ret); + /* Attempt to power the chip back up */ + elan_set_power(data, true); + } } +err: mutex_unlock(&data->sysfs_mutex); return ret; } @@ -1213,7 +1189,13 @@ static int __maybe_unused elan_resume(st data->irq_wake = false; } - error = elan_enable_power(data); + error = regulator_enable(data->vcc); + if (error) { + dev_err(dev, "error %d enabling regulator\n", error); + goto err; + } + + error = elan_set_power(data, true); if (error) { dev_err(dev, "power up when resuming failed: %d\n", error); goto err; Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are queue-4.9/input-elan_i2c-fix-regulator-enable-count-imbalance-after-suspend-resume.patch queue-4.9/input-elan_i2c-move-regulator_able-out-of-elan_able_power.patch