From 8a83780a187ba1961380814eaf9c503043345d12 Mon Sep 17 00:00:00 2001
From: Ian Wisbon <ian.wisbon@timesys.com>
Date: Mon, 14 Feb 2011 16:41:03 -0500
Subject: Digi Release Code from del-5.6/main

---
 drivers/usb/host/ehci-hub.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

(limited to 'drivers/usb/host/ehci-hub.c')

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 44ff32306362..2eac68f54ccd 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -112,7 +112,6 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	int			port;
 	int			mask;
 
-	printk("%s\n", __func__);
 	ehci_dbg(ehci, "suspend root hub\n");
 
 	if (time_before (jiffies, ehci->next_statechange))
@@ -120,9 +119,26 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	del_timer_sync(&ehci->watchdog);
 	del_timer_sync(&ehci->iaa_watchdog);
 
-	port = HCS_N_PORTS (ehci->hcs_params);
 	spin_lock_irq (&ehci->lock);
 
+	/* Once the controller is stopped, port resumes that are already
+	 * in progress won't complete.  Hence if remote wakeup is enabled
+	 * for the root hub and any ports are in the middle of a resume or
+	 * remote wakeup, we must fail the suspend.
+	 */
+	if (hcd->self.root_hub->do_remote_wakeup) {
+		port = HCS_N_PORTS(ehci->hcs_params);
+		while (port--) {
+			if (ehci->reset_done[port] != 0) {
+				spin_unlock_irq(&ehci->lock);
+				ehci_dbg(ehci, "suspend failed because "
+						"port %d is resuming\n",
+						port + 1);
+				return -EBUSY;
+			}
+		}
+	}
+
 	/* stop schedules, clean any completed work */
 	if (HC_IS_RUNNING(hcd->state)) {
 		ehci_quiesce (ehci);
@@ -138,6 +154,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	 */
 	ehci->bus_suspended = 0;
 	ehci->owned_ports = 0;
+	port = HCS_N_PORTS(ehci->hcs_params);
 	while (port--) {
 		u32 __iomem	*reg = &ehci->regs->port_status [port];
 		u32		t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
-- 
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