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authorTerry Loftin <terry.loftin@hp.com>2010-04-09 10:29:49 +0000
committerDavid S. Miller <davem@davemloft.net>2010-04-13 03:03:13 -0700
commitdac876193cd79ced36d0462749ea47c05844fb49 (patch)
tree8b16c5fe80b76ba2fcce7ada953d14269a609980 /drivers/net/e1000e
parentd5aa22520dbb49e726420ca56b3dcfe56724d33e (diff)
e1000e: stop cleaning when we reach tx_ring->next_to_use
Tx ring buffers after tx_ring->next_to_use are volatile and could change, possibly causing a crash. Stop cleaning when we hit tx_ring->next_to_use. Signed-off-by: Terry Loftin <terry.loftin@hp.com> Acked-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/e1000e')
-rw-r--r--drivers/net/e1000e/netdev.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index cfd09cea721..73d43c53015 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -661,6 +661,8 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
i = 0;
}
+ if (i == tx_ring->next_to_use)
+ break;
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC(*tx_ring, eop);
}