From: Zheng Yongjun <zhengyongjun3@huawei.com>
Date: Fri, 22 Apr 2022 06:26:52 +0000 (+0000)
Subject: usb: dwc3: pci: Fix pm_runtime_get_sync() error checking
X-Git-Tag: v5.17.15~282
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24ce123abe7a789fe8b25696d858f2c6bea34718;p=thirdparty%2Fkernel%2Fstable.git

usb: dwc3: pci: Fix pm_runtime_get_sync() error checking

[ 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>
---

diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index f08b2178fd32d..9c8887615701f 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -256,7 +256,7 @@ 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;
 	}