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authorMax.Nekludov@us.elster.com <Max.Nekludov@us.elster.com>2013-03-29 05:27:36 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-29 15:43:08 -0400
commit14bc435ea54cb888409efb54fc6b76c13ef530e9 (patch)
tree02acc6677f57f6be6a82b4ac794298bc415d3bda
parent00cfec37484761a44a3b6f4675a54caa618210ae (diff)
downloadlinux-14bc435ea54cb888409efb54fc6b76c13ef530e9.tar.gz
ks8851: Fix interpretation of rxlen field.
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 <Max.Nekludov@us.elster.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/micrel/ks8851.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c
index 33bcb63d56a2..8fb481252e2c 100644
--- a/drivers/net/ethernet/micrel/ks8851.c
+++ b/drivers/net/ethernet/micrel/ks8851.c
@@ -528,7 +528,7 @@ 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);