diff mbox series

[5.12,120/384] usb: core: hub: Fix PM reference leak in usb_port_resume()

Message ID 20210510102018.850948972@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman May 10, 2021, 10:18 a.m. UTC 
From: Bixuan Cui <cuibixuan@huawei.com>

[ 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@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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/core/hub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 7f71218cc1e5..404507d1b76f 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3556,7 +3556,7 @@  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);