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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 <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2008-01-10 11:14:53 -05:00
committed by Greg Kroah-Hartman
parent f8fa7571a9
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 */ /* turn off now-idle HC */
ehci_halt (ehci); ehci_halt (ehci);
hcd->state = HC_STATE_SUSPENDED; hcd->state = HC_STATE_SUSPENDED;