[PATCH 4.9 116/128] usb: core: Add PM runtime calls to usb_hcd_platform_shutdown

From: Greg Kroah-Hartman
Date: Wed May 29 2019 - 23:44:53 EST


[ Upstream commit 8ead7e817224d7832fe51a19783cb8fcadc79467 ]

If ohci-platform is runtime suspended, we can currently get an "imprecise
external abort" on reboot with ohci-platform loaded when PM runtime
is implemented for the SoC.

Let's fix this by adding PM runtime support to usb_hcd_platform_shutdown.

Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/usb/core/hcd.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index bdb0d7a08ff9b..1dd4c65e9188a 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -3033,6 +3033,9 @@ usb_hcd_platform_shutdown(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);

+ /* No need for pm_runtime_put(), we're shutting down */
+ pm_runtime_get_sync(&dev->dev);
+
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
}
--
2.20.1