diff options
| author | David Dillow <dave@thedillows.org> | 2010-03-03 16:33:10 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-04 00:53:53 -0800 |
| commit | 4c020a961a812ffae9846b917304cea504c3a733 (patch) | |
| tree | c2cae6ab8a1d9b62452b26ea865fdf51573464f3 /drivers/net/r8169.c | |
| parent | d0021b252eaf65ca07ed14f0d66425dd9ccab9a6 (diff) | |
| download | lwn-4c020a961a812ffae9846b917304cea504c3a733.tar.gz lwn-4c020a961a812ffae9846b917304cea504c3a733.zip | |
r8169: use correct barrier between cacheable and non-cacheable memory
r8169 needs certain writes to be visible to other CPUs or the NIC before
touching the hardware, but was using smp_wmb() which is only required to
order cacheable memory access. Switch to wmb() which is required to
order both cacheable and non-cacheable memory.
Noticed by Catalin Marinas and Paul Mackerras.
Signed-off-by: David Dillow <dave@thedillows.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/r8169.c')
| -rw-r--r-- | drivers/net/r8169.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index dfc3573c91bb..9d3ebf3e975e 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -4270,7 +4270,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb, tp->cur_tx += frags + 1; - smp_wmb(); + wmb(); RTL_W8(TxPoll, NPQ); /* set polling bit */ @@ -4621,7 +4621,7 @@ static int rtl8169_poll(struct napi_struct *napi, int budget) * until it does. */ tp->intr_mask = 0xffff; - smp_wmb(); + wmb(); RTL_W16(IntrMask, tp->intr_event); } |