From 00bd6bca3fb1e98190a24eda2583062803c9e8b5 Mon Sep 17 00:00:00 2001 From: Zhang Qilong Date: Mon, 2 Nov 2020 10:26:50 +0800 Subject: [PATCH] USB: apple-mfi-fastcharge: fix reference leak in apple_mfi_fc_set_property pm_runtime_get_sync() will increment pm usage at first and it will resume the device later. If runtime of the device has error or device is in inaccessible state(or other error state), resume operation will fail. If we do not call put operation to decrease the reference, the result is that this device cannot enter the idle state and always stay busy or other non-idle state. Fixes: 249fa8217b846 ("USB: Add driver to control USB fast charge for iOS devices") Signed-off-by: Zhang Qilong Link: https://lore.kernel.org/r/20201102022650.67115-1-zhangqilong3@huawei.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/apple-mfi-fastcharge.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/misc/apple-mfi-fastcharge.c b/drivers/usb/misc/apple-mfi-fastcharge.c index 579d8c84de42..9de0171b5177 100644 --- a/drivers/usb/misc/apple-mfi-fastcharge.c +++ b/drivers/usb/misc/apple-mfi-fastcharge.c @@ -120,8 +120,10 @@ static int apple_mfi_fc_set_property(struct power_supply *psy, dev_dbg(&mfi->udev->dev, "prop: %d\n", psp); ret = pm_runtime_get_sync(&mfi->udev->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_noidle(&mfi->udev->dev); return ret; + } switch (psp) { case POWER_SUPPLY_PROP_CHARGE_TYPE: -- 2.11.0