This patch (as1031) adds a short delay to the bus-suspend routine in
ehci-hcd. Without it some devices disconnect when they should
suspend.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
CC: David Brownell <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/usb/host/ehci-hub.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/ehci-hub.c
+++ usb-2.6/drivers/usb/host/ehci-hub.c
@@ -172,6 +172,10 @@ static int ehci_bus_suspend (struct usb_
}
}
+ /* Apparently some devices need a >= 1-uframe delay here */
+ if (ehci->bus_suspended)
+ udelay(150);
+
/* turn off now-idle HC */
ehci_halt (ehci);
hcd->state = HC_STATE_SUSPENDED;
-
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