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authorJason Wang <jasowang@redhat.com>2012-05-31 18:19:39 +0000
committerDavid S. Miller <davem@davemloft.net>2012-06-01 14:22:11 -0400
commitb01af4579ec41f48e9b9c774e70bd6474ad210db (patch)
tree7cedbc0e5304110e4043e4525ae386fbe95ea203 /drivers/net/ethernet/realtek/8139cp.c
parent20e2a86485967c385d7c7befc1646e4d1d39362e (diff)
downloadvexpress-lsk-b01af4579ec41f48e9b9c774e70bd6474ad210db.tar.gz
8139cp: set ring address before enabling receiver
Currently, we enable the receiver before setting the ring address which could lead the card DMA into unexpected areas. Solving this by set the ring address before enabling the receiver. btw. I find and test this in qemu as I didn't have a 8139cp card in hand. please review it carefully. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/realtek/8139cp.c')
-rw-r--r--drivers/net/ethernet/realtek/8139cp.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
index 5eef290997f..7f08779acba 100644
--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -979,6 +979,17 @@ static void cp_init_hw (struct cp_private *cp)
cpw32_f (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
cpw32_f (MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
+ cpw32_f(HiTxRingAddr, 0);
+ cpw32_f(HiTxRingAddr + 4, 0);
+
+ ring_dma = cp->ring_dma;
+ cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
+ cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
+
+ ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
+ cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
+ cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
+
cp_start_hw(cp);
cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
@@ -992,17 +1003,6 @@ static void cp_init_hw (struct cp_private *cp)
cpw8(Config5, cpr8(Config5) & PMEStatus);
- cpw32_f(HiTxRingAddr, 0);
- cpw32_f(HiTxRingAddr + 4, 0);
-
- ring_dma = cp->ring_dma;
- cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
- cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
-
- ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
- cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
- cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
-
cpw16(MultiIntr, 0);
cpw8_f(Cfg9346, Cfg9346_Lock);