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Subject[PATCH] Accept large ethernet frames to support VLANs (natsemi.c, against 2.4.17)
Hi All,

Here is my first shot at a kernel patch. It enables
accepting ethernet frames larger than 1518 bytes on
the natsemi DP83815 based ethernet cards (eg Netgear
FA311/Fa312), to support 802.1Q VLANs.

It seems to work for me, although I've only tested it
between two linux boxes running VLANs (both with
Netgear FA312 cards), rather than into a VLAN capable
ethernet switch, as I don't have one at home.

For any comments, suggestions or criticisms, please CC
me, as I'm not subscribed to the mailing list.

Thanks,
Mark.

--- linux.2.4.17/drivers/net/natsemi.c Sat Dec 22
15:38:15 2001
+++ linux.2.4.17.mrs/drivers/net/natsemi.c Sat
Feb 23 19:04:46 2002
@@ -102,6 +102,11 @@
version 1.0.13:
* ETHTOOL_[GS]EEPROM support (Tim
Hockin)

+ version 1.0.13+MRS-VLAN
+ * Switch on RxAcceptLong to support
big ethernet frames for
+ 802.1Q VLANs
+ Mark R. Smith,
markzzzsmith@yahoo.com.au
+
TODO:
* big endian support with CFG:BEM instead of
cpu_to_le32
* support for an external PHY
@@ -109,8 +114,8 @@
*/

#define DRV_NAME "natsemi"
-#define DRV_VERSION "1.07+LK1.0.13"
-#define DRV_RELDATE "Oct 19, 2001"
+#define DRV_VERSION "1.07+LK1.0.13+MRS-VLAN"
+#define DRV_RELDATE "Feb 23, 2002"

/* Updated to recommendations in pci-skeleton v2.03.
*/

@@ -1162,8 +1167,9 @@

/* DRTH 0x10: start copying to memory if 128
bytes are in the fifo
* MXDMA 0: up to 256 byte bursts
+ * RxAcceptLong: accept long frames for 802.1Q
VLANs
*/
- np->rx_config = RxMxdma_256 | 0x20;
+ np->rx_config = RxMxdma_256 | 0x20 |
RxAcceptLong;
writel(np->rx_config, ioaddr + RxConfig);

/* Disable PME:

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