1 files changed, 21 insertions, 3 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 53839979cfb8..ab0ab92583fe 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2165,9 +2165,27 @@ force_update:
                         /* fall through */
 #endif
                 case OP_RXCHKS:
-                        skb = sky2->rx_ring[sky2->rx_next].skb;
-                        skb->ip_summed = CHECKSUM_COMPLETE;
-                        skb->csum = status & 0xffff;
+                        if (!sky2->rx_csum)
+                                break;
+
+                        /* Both checksum counters are programmed to start at
+                         * the same offset, so unless there is a problem they
+                         * should match. This failure is an early indication that
+                         * hardware receive checksumming won't work.
+                         */
+                        if (likely(status >> 16 == (status & 0xffff))) {
+                                skb = sky2->rx_ring[sky2->rx_next].skb;
+                                skb->ip_summed = CHECKSUM_COMPLETE;
+                                skb->csum = status & 0xffff;
+                        } else {
+                                printk(KERN_NOTICE PFX "%s: hardware receive "
+                                       "checksum problem (status = %#x)\n",
+                                       dev->name, status);
+                                sky2->rx_csum = 0;
+                                sky2_write32(sky2->hw,
+                                             Q_ADDR(rxqaddr[le->link], Q_CSR),
+                                             BMU_DIS_RX_CHKSUM);
+                        }
                         break;
 
                 case OP_TXINDEXLE: