[PATCH 5.4 294/411] usb: dwc3: pci: Fix pm_runtime_get_sync() error checking

Greg Kroah-Hartman
2022-06-13T11:37:06Z

From: Zheng Yongjun <zhengyongjun3@huawei.com>

[ Upstream commit a03e2ddab8e735e2cc315609b297b300e9cc60d2 ]

If the device is already in a runtime PM enabled state
pm_runtime_get_sync() will return 1, so a test for negative
value should be used to check for errors.

Fixes: 8eed00b237a28 ("usb: dwc3: pci: Runtime resume child device from wq")
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20220422062652.10575-1-zhengyongjun3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/dwc3/dwc3-pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 99964f96ff74..955bf820f410 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -211,7 +211,7 @@ static void dwc3_pci_resume_work(struct work_struct *work)
int ret;

ret = pm_runtime_get_sync(&dwc3->dev);
- if (ret) {
+ if (ret < 0) {
pm_runtime_put_sync_autosuspend(&dwc3->dev);
return;
}
--
2.35.1