sky2: Fix checksum endianness

[ Upstream commit b9389796fa4c87fbdff33816e317cdae5f36dd0b ]

sky2 driver on PowerPC targets floods kernel log with following errors:

  eth1: hw csum failure.
  Call Trace:
  [ef84b8a0] [c00075e4] show_stack+0x50/0x160 (unreliable)
  [ef84b8d0] [c02fa178] netdev_rx_csum_fault+0x3c/0x5c
  [ef84b8f0] [c02f6920] __skb_checksum_complete_head+0x7c/0x84
  [ef84b900] [c02f693c] __skb_checksum_complete+0x14/0x24
  [ef84b910] [c0337e08] tcp_v4_rcv+0x4c8/0x6f8
  [ef84b940] [c031a9c8] ip_local_deliver+0x98/0x210
  [ef84b960] [c031a788] ip_rcv+0x38c/0x534
  [ef84b990] [c0300338] netif_receive_skb+0x260/0x36c
  [ef84b9c0] [c025de00] sky2_poll+0x5dc/0xcf8
  [ef84ba20] [c02fb7fc] net_rx_action+0xc0/0x144

The NIC is Yukon-2 EC chip revision 1.

Converting checksum field from le16 to CPU byte order fixes the issue.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index b68bc39..42963a9 100644 (file)
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2393,7 +2393,7 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
                        if (likely(status >> 16 == (status & 0xffff))) {
                                skb = sky2->rx_ring[sky2->rx_next].skb;
                                skb->ip_summed = CHECKSUM_COMPLETE;
-                               skb->csum = status & 0xffff;
+                               skb->csum = le16_to_cpu(status);
                        } else {
                                printk(KERN_NOTICE PFX "%s: hardware receive "
                                       "checksum problem (status = %#x)\n",