The de2104x returns sometimes a wrong MAC address. The wrong one is
like the original one, but it comes with an one byte shift. I found
this bug on an older alpha ev5 cpu. More details are available in Gentoo
bugreport #240718.
It seems the hardware is sometimes a little bit too slow for an
immediate access. This patch solves the problem by introducing a small
udelay.
Signed-off-by: Martin Langer <martin-langer@xxxxxx>
--- drivers/net/tulip/de2104x.c_ORIGINAL 2008-10-10 00:13:53.000000000 +0200
+++ drivers/net/tulip/de2104x.c 2008-10-11 19:04:32.000000000 +0200
@@ -1689,6 +1689,7 @@
unsigned i;
dw32 (ROMCmd, 0); /* Reset the pointer with a dummy write. */
+ udelay(5);
for (i = 0; i < 6; i++) {
int value, boguscnt = 100000;
--
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