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| author | Bixuan Cui <cuibixuan@huawei.com> | 2021-04-08 21:08:31 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-09 16:03:25 +0200 |
| commit | 025f97d188006eeee4417bb475a6878d1e0eed3f (patch) | |
| tree | b29b045d83d2cb5064aed5ed54b002735f61d582 | |
| parent | 9535b99533904e9bc1607575aa8e9539a55435d7 (diff) | |
| download | linux-025f97d188006eeee4417bb475a6878d1e0eed3f.tar.gz linux-025f97d188006eeee4417bb475a6878d1e0eed3f.tar.bz2 linux-025f97d188006eeee4417bb475a6878d1e0eed3f.zip | |
usb: core: hub: Fix PM reference leak in usb_port_resume()
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>
| -rw-r--r-- | drivers/usb/core/hub.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 9a83390072da..b2bc4b7c4289 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -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); |