frindex is a 14 bits counter, so bits 31-14 should always be 0, and
after the commit titled "usb-ehci: frindex always is a 14 bits counter"
we rely on frindex always being a multiple of 8. I've not seen this in
practice, but theoretically a guest can write a value >= 0x4000 or a value
which is not a multiple of 8 value to frindex, this patch ensures that
things will still work when that happens.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
val &= USBINTR_MASK;
break;
+ case FRINDEX:
+ val &= 0x00003ff8; /* frindex is 14bits and always a multiple of 8 */
+ break;
+
case CONFIGFLAG:
val &= 0x1;
if (val) {