USB: EHCI: add a short delay to the bus_suspend routine
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 <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 7919a41..ccd88ae 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -172,6 +172,10 @@
}
}
+ /* 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;