The RX bytecount was only updated in the PIO path and thus
the device erroneously reported a value of 0 if DMA is in
use.
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Acked-by: NJiada Wang <jiada_wang@mentor.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>