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Commit 99f93a15 authored by Alexander Kochetkov's avatar Alexander Kochetkov Committed by David S. Miller
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net: arc_emac: reset txbd_curr and txbd_dirty pointers to zero 



EMAC reset internal tx ring pointer to zero at statup.
txbd_curr and txbd_dirty can be different from zero.
That cause ethernet transfer hang (no packets transmitted).

In order to reproduce, run on device:
    ifconfig eth0 down
    ifconfig eth0 up

Signed-off-by: default avatarAlexander Kochetkov <al.kochet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c278c253

drivers/net/ethernet/arc/emac_main.c

+3 −0
Original line number Diff line number Diff line
@@ -447,6 +447,9 @@ static int arc_emac_open(struct net_device *ndev) 
		*last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM;

	}



	priv->txbd_curr = 0;

	priv->txbd_dirty = 0;



	/* Clean Tx BD's */

	memset(priv->txbd, 0, TX_RING_SZ);