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authorMartin Langer <martin-langer@gmx.de>2008-10-14 05:49:38 +0400
committerDavid S. Miller <davem@davemloft.net>2008-10-14 05:49:38 +0400
commitbc0da3fcec1cec11dc451b8fcb9c9ad7e4ca6e12 (patch)
tree00aa6f51673afe88d316041e562fe7e2cf414e6a /drivers/net/tulip/de2104x.c
parentebe05d06a5051e7ddc07d76eab541a1d6b6eafcd (diff)
downloadlinux-bc0da3fcec1cec11dc451b8fcb9c9ad7e4ca6e12.tar.xz
de2104x: wrong MAC address fix
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@gmx.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tulip/de2104x.c')
-rw-r--r--drivers/net/tulip/de2104x.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/tulip/de2104x.c b/drivers/net/tulip/de2104x.c
index f54c45049d50..124d5d690dde 100644
--- a/drivers/net/tulip/de2104x.c
+++ b/drivers/net/tulip/de2104x.c
@@ -1688,6 +1688,7 @@ static void __devinit de21040_get_mac_address (struct de_private *de)
unsigned i;
dw32 (ROMCmd, 0); /* Reset the pointer with a dummy write. */
+ udelay(5);
for (i = 0; i < 6; i++) {
int value, boguscnt = 100000;