USB: clean up redundant tests on unsigned

temp, bytes and param->{length,sglen,vary} are unsigned so
these tests do nothing.

Signed-off-by: Roel Kluin <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/host/ehci-dbg.c

···
 				(scratch >> 16) & 0x7fff,
 				scratch,
 				td->urb);
-		if (temp < 0)
-			temp = 0;
-		else if (size < temp)
+		if (size < temp)
 			temp = size;
 		size -= temp;
 		next += temp;
···
 	}
 
 	temp = snprintf (next, size, "\n");
-	if (temp < 0)
-		temp = 0;
-	else if (size < temp)
+	if (size < temp)
 		temp = size;
 	size -= temp;
 	next += temp;

drivers/usb/misc/usbtest.c

···
 {
 	struct urb		*urb;
 
-	if (bytes < 0)
-		return NULL;
 	urb = usb_alloc_urb (0, GFP_KERNEL);
 	if (!urb)
 		return urb;