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USB: EHCI: add a short delay to the bus_suspend routine

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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]>
Acked-by: David Brownell <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Alan Stern 2008-01-10 11:14:53 -05:00 • committed by Greg Kroah-Hartman
commit cd930c9314
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/host/ehci-hub.c
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@ -172,6 +172,10 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
}
}
/* 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;