[PATCH 4.19 216/346] usb: ehci-omap: Fix PM disable depth umbalance in ehci_hcd_omap_probe

Greg Kroah-Hartman
2020-12-28T16:00:12Z

From: Zhang Qilong <zhangqilong3@huawei.com>

[ Upstream commit d6ff32478d7e95d6ca199b5c852710d6964d5811 ]

The pm_runtime_enable will decrement the power disable depth. Imbalance
depth will resulted in enabling runtime PM of device fails later. Thus
a pairing decrement must be needed on the error handling path to keep it
balanced.

Fixes: 6c984b066d84b ("ARM: OMAP: USBHOST: Replace usbhs core driver APIs by Runtime pm APIs")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201123145719.1455849-1-zhangqilong3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/host/ehci-omap.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 7d20296cbe9f9..d31c425d61675 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -222,6 +222,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)

err_pm_runtime:
pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);

err_phy:
for (i = 0; i < omap->nports; i++) {
--
2.27.0