From dac876193cd79ced36d0462749ea47c05844fb49 Mon Sep 17 00:00:00 2001 From: Terry Loftin Date: Fri, 9 Apr 2010 10:29:49 +0000 Subject: 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 Acked-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/netdev.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/net/e1000e') diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index cfd09cea7214..73d43c53015a 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); } -- cgit v1.2.3-59-g8ed1b