USB: output an error message when the pipe type doesn't match the end…

…point type

Commit f661c6f adds a check of the pipe type if
CONFIG_USB_DEBUG is enabled, but it doesn't output anything if this scenario
occurs.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/urb.c

@@ -401,8 +401,11 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
 	};
 
 	/* Check that the pipe's type matches the endpoint's type */
-	if (usb_pipetype(urb->pipe) != pipetypes[xfertype])
+	if (usb_pipetype(urb->pipe) != pipetypes[xfertype]) {
+		dev_err(&dev->dev, "BOGUS urb xfer, pipe %x != type %x\n",
+			usb_pipetype(urb->pipe), pipetypes[xfertype]);
 		return -EPIPE;		/* The most suitable error code :-) */
+	}
 
 	/* enforce simple/standard policy */
 	allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT | URB_DIR_MASK |