diff options
| author | David Dillow <dave@thedillows.org> | 2010-03-03 16:33:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-12 14:57:12 -0700 |
| commit | 0c03e80e912e9332a8167b9172fd74d1323f3e9b (patch) | |
| tree | 2d3e8d4528e2d53f93cc18b8deb023838194e809 | |
| parent | 150d8a1fe2e89b124bc5bc3628095b8db2435272 (diff) | |
r8169: use correct barrier between cacheable and non-cacheable memory
commit 4c020a961a812ffae9846b917304cea504c3a733 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 ab753234e35a..9d3dd3ce8e9c 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -4316,7 +4316,7 @@ 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 */ @@ -4676,7 +4676,7 @@ 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); } |