2013-04-11 21:26:07

by Steven Rostedt

[permalink] [raw]
Subject: [ 166/171 ] ks8851: Fix interpretation of rxlen field.

3.6.11.2 stable review patch.
If anyone has any objections, please let me know.

------------------

From: "[email protected]" <[email protected]>

[ Upstream commit 14bc435ea54cb888409efb54fc6b76c13ef530e9 ]

According to the Datasheet (page 52):
15-12 Reserved
11-0 RXBC Receive Byte Count
This field indicates the present received frame byte size.

The code has a bug:
rxh = ks8851_rdreg32(ks, KS_RXFHSR);
rxstat = rxh & 0xffff;
rxlen = rxh >> 16; // BUG!!! 0xFFF mask should be applied

Signed-off-by: Max Nekludov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
---
drivers/net/ethernet/micrel/ks8851.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c
index 1540ebe..a4cd9a0 100644
--- a/drivers/net/ethernet/micrel/ks8851.c
+++ b/drivers/net/ethernet/micrel/ks8851.c
@@ -547,7 +547,7 @@ static void ks8851_rx_pkts(struct ks8851_net *ks)
for (; rxfc != 0; rxfc--) {
rxh = ks8851_rdreg32(ks, KS_RXFHSR);
rxstat = rxh & 0xffff;
- rxlen = rxh >> 16;
+ rxlen = (rxh >> 16) & 0xfff;

netif_dbg(ks, rx_status, ks->netdev,
"rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen);
--
1.7.10.4