Commit dac87619 authored Apr 09, 2010 by Terry Loftin Committed by David S. Miller Apr 13, 2010

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>

parent d5aa2252

drivers/net/e1000e/netdev.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}