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Commit 1269a8a6 authored by Michael Chan's avatar Michael Chan Committed by David S. Miller
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[BNX2]: Workaround hw interrupt bug 



Add workaround for a hardware interrupt issue. When using INTA,
unmasking of the interrupt and the tag update should be done
separately to avoid some spurious interrupts,

Signed-off-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ade2bfe7

drivers/net/bnx2.c

+17 −2
Original line number Diff line number Diff line
@@ -315,6 +315,10 @@ bnx2_enable_int(struct bnx2 *bp) 
{

	u32 val;



	REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,

	       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |

	       BNX2_PCICFG_INT_ACK_CMD_MASK_INT | bp->last_status_idx);



	REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,

	       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | bp->last_status_idx);
@@ -1892,6 +1896,17 @@ bnx2_poll(struct net_device *dev, int *budget) 


	if (!bnx2_has_work(bp)) {

		netif_rx_complete(dev);

		if (likely(bp->flags & USING_MSI_FLAG)) {

			REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,

			       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |

			       bp->last_status_idx);

			return 0;

		}

		REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,

		       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |

		       BNX2_PCICFG_INT_ACK_CMD_MASK_INT |

		       bp->last_status_idx);



		REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,

		       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |

		       bp->last_status_idx);