From: Stephen Hemminger <shemminger@linux-foundation.org>
Date: Thu, 27 Sep 2007 19:38:12 +0000 (-0700)
Subject: sky2: fix transmit state on resume
X-Git-Tag: v2.6.23-rc9~21^2~1
X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=88f5f0cad396be594d6d55cb2d0cd69e8df9ab16;hp=d6c9bc1ed4301cbc3df4565ff5348b64bf2a767c

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 <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 3bfc9d3e3c6e..162489b9f599 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -910,6 +910,20 @@ static inline struct sky2_tx_le *get_tx_le(struct sky2_port *sky2)
 	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)
 {
@@ -1320,7 +1334,8 @@ static int sky2_up(struct net_device *dev)
 				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);