sky2: fix transmit state on resume

This should fix http://bugzilla.kernel.org/show_bug.cgi?id=8667

After resume, driver has reset the chip so the current state
of transmit checksum offload state machine and DMA state machine
will be undefined.

The fix is to set the state so that first Tx will set MSS and offset
values.

Signed-off-by: Stephen Hemminger <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/net/sky2.c

···
 	return le;
 }
 
+static void tx_init(struct sky2_port *sky2)
+{
+	struct sky2_tx_le *le;
+
+	sky2->tx_prod = sky2->tx_cons = 0;
+	sky2->tx_tcpsum = 0;
+	sky2->tx_last_mss = 0;
+
+	le = get_tx_le(sky2);
+	le->addr = 0;
+	le->opcode = OP_ADDR64 | HW_OWNER;
+	sky2->tx_addr64 = 0;
+}
+
 static inline struct tx_ring_info *tx_le_re(struct sky2_port *sky2,
 					    struct sky2_tx_le *le)
 {
···
 				GFP_KERNEL);
 	if (!sky2->tx_ring)
 		goto err_out;
-	sky2->tx_prod = sky2->tx_cons = 0;
+
+	tx_init(sky2);
 
 	sky2->rx_le = pci_alloc_consistent(hw->pdev, RX_LE_BYTES,
 					   &sky2->rx_le_map);