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typhoon: fix incorrect use of smp_wmb()

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The typhoon driver was incorrectly using smp_wmb() to order memory
accesses against IO to the NIC in a few instances. Use wmb() instead,
which is required to actually order between memory types.

Signed-off-by: David Dillow <dave@thedillows.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Dillow 2010-03-04 04:37:16 +00:00 • committed by David S. Miller
parent d17792ebdf
commit 5fe88eae26
1 changed files with 4 additions and 2 deletions
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6
drivers/net/typhoon.c
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@ -480,7 +480,7 @@ typhoon_hello(struct typhoon *tp)
typhoon_inc_cmd_index(&ring->lastWrite, 1);
INIT_COMMAND_NO_RESPONSE(cmd, TYPHOON_CMD_HELLO_RESP);
smp_wmb();
wmb();
iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY);
spin_unlock(&tp->command_lock);
}
@ -1311,13 +1311,15 @@ typhoon_init_interface(struct typhoon *tp)
tp->txlo_dma_addr = le32_to_cpu(iface->txLoAddr);
tp->card_state = Sleeping;
smp_wmb();
tp->offload = TYPHOON_OFFLOAD_IP_CHKSUM | TYPHOON_OFFLOAD_TCP_CHKSUM;
tp->offload |= TYPHOON_OFFLOAD_UDP_CHKSUM | TSO_OFFLOAD_ON;
spin_lock_init(&tp->command_lock);
spin_lock_init(&tp->state_lock);
/* Force the writes to the shared memory area out before continuing. */
wmb();
}
static void