USB: uhci.c poll for wakeup events

USB: uhci.c poll for wakeup events

[Pete Zaitcev]

Forwarded from: Alan Stern

This patch causes the uhci driver in 2.4 to wake up the controller when
the root-hub polling loop detects a connect change event.  Normally the
wakeup is handled by an interrupt, but it turns out the recent Genesys
Logic GL880S UHCI controller is defective and does not generate the 
necessary IRQ.  With this patch the controller becomes useable.

[P3: The usb-uhci is not affected, apparently.]


Signed-off-by: Alan Stern <stern@rowland.harvard.edu>

--- linux-2.4.27/drivers/usb/host/uhci.c.orig	2003-06-13 10:51:36.000000000 -0400
+++ linux-2.4.27/drivers/usb/host/uhci.c	2004-10-28 11:52:27.000000000 -0400
@@ -1981,6 +1981,8 @@
 	if ((data > 0) && (uhci->rh.send != 0)) {
 		dbg("root-hub INT complete: port1: %x port2: %x data: %x",
 			inw(io_addr + USBPORTSC1), inw(io_addr + USBPORTSC2), data);
+		if (uhci->is_suspended)
+			wakeup_hc(uhci);
 		uhci_call_completion(urb);
 	}