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usb: hub: Don't wait for connect state at resume for powered-off ports 

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@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dominik Bozek 2018-04-13 10:42:31 -07:00 committed by Greg Kroah-Hartman
parent f86c6888dd
commit 5d111f5190
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/core/hub.c
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@ -3371,6 +3371,10 @@ static int wait_for_connected(struct usb_device *udev,
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);