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UHCI: hub_status_data should indicate if ports are resuming 

This patch (as1538) causes uhci_hub_status_data() to return a nonzero
value when any port is undergoing a resume transition while the root
hub is suspended.  This will allow usbcore to handle races between
root-hub suspend and port wakeup.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Stern 2012-04-03 15:24:43 -04:00 committed by Greg Kroah-Hartman
parent a448e4dc25
commit b446b96fd1
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/host/uhci-hub.c
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@ -196,11 +196,12 @@ static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf)
status = get_hub_status_data(uhci, buf);
switch (uhci->rh_state) {
case UHCI_RH_SUSPENDING:
case UHCI_RH_SUSPENDED:
/* if port change, ask to be resumed */
if (status || uhci->resuming_ports)
if (status || uhci->resuming_ports) {
status = 1;
usb_hcd_resume_root_hub(hcd);
}
break;
case UHCI_RH_AUTO_STOPPED: