4.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dominik Bozek <dominikx.bozek@xxxxxxxxx>
[ Upstream commit 5d111f5190848d6fb1c414dc57797efea3526a2f ]
wait_for_connected() wait till a port change status to
USB_PORT_STAT_CONNECTION, but this is not possible if
the port is unpowered. The loop will only exit at timeout.
Such case take place if an over-current incident happen
while system is in S3. Then during resume wait_for_connected()
will wait 2s, which may be noticeable by the user.
Signed-off-by: Dominik Bozek <dominikx.bozek@xxxxxxxxx>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/core/hub.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3380,6 +3380,10 @@ static int wait_for_connected(struct usb
while (delay_ms < 2000) {
if (status || *portstatus & USB_PORT_STAT_CONNECTION)
break;
+ if (!port_is_power_on(hub, *portstatus)) {
+ status = -ENODEV;
+ break;
+ }
msleep(20);
delay_ms += 20;
status = hub_port_status(hub, *port1, portstatus, portchange);
