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USB: EHCI: keep better track of resuming ports 

The ehci-hcd driver isn't as careful as it should be about the way it
uses ehci->resuming_ports.  One of the omissions was fixed recently by
commit 47a64a13d5 (USB: EHCI: Fix resume signalling on remote
wakeup), but there are other places that need attention:

	When a port's suspend feature is explicitly cleared, the
	corresponding bit in resuming_ports should be set and the core
	should be notified about the port resume.

	We don't need to clear a resuming_ports bit when a reset
	completes.

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 2013-08-01 17:09:23 -04:00 committed by Greg Kroah-Hartman
parent b8bdad6082
commit 3a20446f02
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/host/ehci-hub.c
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@ -801,6 +801,8 @@ static int ehci_hub_control (
ehci_writel(ehci, temp | PORT_RESUME, status_reg);
ehci->reset_done[wIndex] = jiffies
+ msecs_to_jiffies(20);
set_bit(wIndex, &ehci->resuming_ports);
usb_hcd_start_port_resume(&hcd->self, wIndex);
break;
case USB_PORT_FEAT_C_SUSPEND:
clear_bit(wIndex, &ehci->port_c_suspend);
@ -911,7 +913,6 @@ static int ehci_hub_control (
ehci->reset_done[wIndex])) {
status |= USB_PORT_STAT_C_RESET << 16;
ehci->reset_done [wIndex] = 0;
clear_bit(wIndex, &ehci->resuming_ports);
/* force reset to complete */
ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),