[PATCH] ohci-hcd cardbus unplug

This is the 2.5 version of that 2.4 patch I sent recently,
which makes the OHCI driver behave usably on at least
some cardbus systems when the card is just ejected without
a clean shutdown.

drivers/usb/host/ohci-dbg.c

@@ -190,6 +190,8 @@ static void ohci_dump_roothub (struct ohci_hcd *controller, int verbose)
 	__u32			temp, ndp, i;
 
 	temp = roothub_a (controller);
+	if (temp == ~(u32)0)
+		return;
 	ndp = (temp & RH_A_NDP);
 
 	if (verbose) {

drivers/usb/host/ohci-hcd.c

@@ -502,11 +502,19 @@ static void ohci_irq (struct usb_hcd *hcd)
 	if ((ohci->hcca->done_head != 0)
 			&& ! (le32_to_cpup (&ohci->hcca->done_head) & 0x01)) {
 		ints =  OHCI_INTR_WDH;
-	} else if ((ints = (readl (&regs->intrstatus)
-			& readl (&regs->intrenable))) == 0) {
+
+	/* cardbus/... hardware gone before remove() */
+	} else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
+		ohci->disabled++;
+		err ("%s device removed!", hcd->self.bus_name);
+		return;
+
+	/* interrupt for some other device? */
+	} else if ((ints &= readl (&regs->intrenable)) == 0) {
 		return;
 	} 
 
+
 	// dbg ("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no));
 
 	if (ints & OHCI_INTR_UE) {