[PATCH AUTOSEL 5.4 25/34] usb: core: hub: Fix PM reference leak in usb_port_resume()

[Sasha Levin]

From: Bixuan Cui <cuibixuan@xxxxxxxxxx>

[ Upstream commit 025f97d188006eeee4417bb475a6878d1e0eed3f ]

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@xxxxxxxxxx>
Signed-off-by: Bixuan Cui <cuibixuan@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210408130831.56239-1-cuibixuan@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/usb/core/hub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 4d3de33885ff..cd61860cada5 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3537,7 +3537,7 @@ 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);
-- 
2.30.2