net: mvneta: fix enable of all initialized RXQs

BugLink: https://bugs.launchpad.net/bugs/1775771

[ Upstream commit e81b5e01 ]

In mvneta_port_up() we enable relevant RX and TX port queues by write
queues bit map to an appropriate register.

q_map must be ZERO in the beginning of this process.
Signed-off-by: Yelena Krivosheev <yelena@marvell.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

drivers/net/ethernet/marvell/mvneta.c

@@ -818,6 +818,7 @@ static void mvneta_port_up(struct mvneta_port *pp)
 	}
 	mvreg_write(pp, MVNETA_TXQ_CMD, q_map);
 
+	q_map = 0;
 	/* Enable all initialized RXQs. */
 	mvreg_write(pp, MVNETA_RXQ_CMD, BIT(rxq_def));
 }