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usb: core: hub: Fix PM reference leak in usb_port_resume()

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pm_runtime_get_sync will increment pm usage counter even it failed.
thus a pairing decrement is needed.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
Link: https://lore.kernel.org/r/20210408130831.56239-1-cuibixuan@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bixuan Cui 2021-04-08 21:08:31 +08:00 committed by Greg Kroah-Hartman
parent 9535b99533
commit 025f97d188
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/core/hub.c
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@ -3605,7 +3605,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
u16 portchange, portstatus;
if (!test_and_set_bit(port1, hub->child_usage_bits)) {
status = pm_runtime_get_sync(&port_dev->dev);
status = pm_runtime_resume_and_get(&port_dev->dev);
if (status < 0) {
dev_dbg(&udev->dev, "can't resume usb port, status %d\n",
status);