Messages in this thread Patch in this message |  | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.4 25/34] usb: core: hub: Fix PM reference leak in usb_port_resume() | Date | Sun, 2 May 2021 10:04:25 -0400 |
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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 --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
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