[PATCH v2] usb/host/ehci-hub: Fix the issue EG20T USB host controller has long resuming time, when pen drive is attached.

[Tomoya MORINAGA]

Intel EG20T USB host controller does not send SOF in resuming time after suspending, if the FLR bit was not cleared. When pen drive is attached, the controller has a long resuming time to try re-connect it. This patch clear the FLR bit in suspending time for fixing the issue.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@xxxxxxxxx>
---
v2: Update comments from Alan Stern
	Add patch description
	Always clear the STS_FLR flag.
---
 drivers/usb/host/ehci-hub.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index fc9e7cc..818a2f1 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -318,6 +318,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	ehci_readl(ehci, &ehci->regs->intr_enable);
 
 	ehci->next_statechange = jiffies + msecs_to_jiffies(10);
+	ehci_writel(ehci, STS_FLR, &ehci->regs->status);
 	spin_unlock_irq (&ehci->lock);
 
 	/* ehci_work() may have re-enabled the watchdog timer, which we do not
-- 
1.7.4.4

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