[PATCH] USB: Make device reset stop retrying after disconnect

This patch (as898) changes the port reset code in the hub driver.  If
a connect change occurs, it is reported the same way as a disconnect
(which of course is what it really is).

It also changes usb_reset_device(), to prevent the routine from futilely
retrying the reset after a disconnect has occurred.

Signed-off-by: Alan Stern <[email protected]>

---

Index: usb-2.6/drivers/usb/core/hub.c
===================================================================
--- usb-2.6.orig/drivers/usb/core/hub.c
+++ usb-2.6/drivers/usb/core/hub.c
@@ -1529,9 +1529,9 @@ static int hub_port_wait_reset(struct us
 		if (!(portstatus & USB_PORT_STAT_CONNECTION))
 			return -ENOTCONN;
 
-		/* bomb out completely if something weird happened */
+		/* bomb out completely if the connection bounced */
 		if ((portchange & USB_PORT_STAT_C_CONNECTION))
-			return -EINVAL;
+			return -ENOTCONN;
 
 		/* if we`ve finished resetting, then break out of the loop */
 		if (!(portstatus & USB_PORT_STAT_RESET) &&
@@ -2969,7 +2969,7 @@ int usb_reset_device(struct usb_device *
 		 * Other endpoints will be handled by re-enumeration. */
 		ep0_reinit(udev);
 		ret = hub_port_init(parent_hub, udev, port1, i);
-		if (ret >= 0)
+		if (ret >= 0 || ret == -ENOTCONN || ret == -ENODEV)
 			break;
 	}
 	clear_bit(port1, parent_hub->busy_bits);


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