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 47a64a13d54 (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@xxxxxxxxxxxxxxxxxxx>
---
[as1697]
drivers/usb/host/ehci-hub.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: usb-3.11/drivers/usb/host/ehci-hub.c
===================================================================
--- usb-3.11.orig/drivers/usb/host/ehci-hub.c
+++ usb-3.11/drivers/usb/host/ehci-hub.c
@@ -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),
--
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