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authorJesse Brandeburg <jesse.brandeburg@intel.com>2010-03-04 21:21:44 -0500
committerDavid S. Miller <davem@davemloft.net>2010-03-05 17:00:18 -0500
commita80483d3722b603dae8a52495f8d88a7d4b1bf1c (patch)
tree06496263f5f2f7bb75a154f892c0b4f0277f15e9 /drivers/net/e1000e/ich8lan.c
parent5fe88eae26dbd24eed73eb0b681e13981fd486b3 (diff)
e1000e: fix packet corruption and tx hang during NFSv2
when receiving a particular type of NFS v2 UDP traffic, the hardware could DMA some bad data and then hang, possibly corrupting memory. Disable the NFS parsing in this hardware, verified to fix the bug. Originally reported and reproduced by RedHat's Neil Horman CC: nhorman@tuxdriver.com Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/e1000e/ich8lan.c')
-rw-r--r--drivers/net/e1000e/ich8lan.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 54d03a0ce3ce..8b5e157e9c87 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -2740,6 +2740,16 @@ static void e1000_initialize_hw_bits_ich8lan(struct e1000_hw *hw)
2740 reg &= ~(1 << 31); 2740 reg &= ~(1 << 31);
2741 ew32(STATUS, reg); 2741 ew32(STATUS, reg);
2742 } 2742 }
2743
2744 /*
2745 * work-around descriptor data corruption issue during nfs v2 udp
2746 * traffic, just disable the nfs filtering capability
2747 */
2748 reg = er32(RFCTL);
2749 reg |= (E1000_RFCTL_NFSW_DIS | E1000_RFCTL_NFSR_DIS);
2750 ew32(RFCTL, reg);
2751
2752 return;
2743} 2753}
2744 2754
2745/** 2755/**