From: Alan Cox <alan@redhat.com>
To: linux-kernel@vger.kernel.org, akpm@osdl.org, jgarzik@pobox.com
Subject: PATCH: 3c59x 00:00:00:00:00:00 MAC failure
Date: Wed, 29 Sep 2004 12:30:23 -0400 [thread overview]
Message-ID: <20040929163023.GA17899@devserv.devel.redhat.com> (raw)
The 3com EEPROM has a checksum but unfortunately it seems that a zapped
EEPROM returning all zero values passes the checksum test fine and we try
and use it.
--- drivers/net/3c59x.c~ 2004-09-29 17:23:42.964453264 +0100
+++ drivers/net/3c59x.c 2004-09-29 17:28:40.358242536 +0100
@@ -1295,6 +1295,13 @@
for (i = 0; i < 6; i++)
printk("%c%2.2x", i ? ':' : ' ', dev->dev_addr[i]);
}
+ /* Unfortunately an all zero eeprom passes the checksum and this
+ gets found in the wild in failure cases. Crypto is hard 8) */
+ if (memcmp(dev->dev_addr, "\0\0\0\0\0", 6) == 0) {
+ retval = -EINVAL;
+ printk(KERN_ERR "*** EEPROM MAC address is invalid.\n");
+ goto free_ring; /* With every pack */
+ }
EL3WINDOW(2);
for (i = 0; i < 6; i++)
outb(dev->dev_addr[i], ioaddr + i);
next reply other threads:[~2004-09-29 16:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-29 16:30 Alan Cox [this message]
2004-09-29 16:45 ` PATCH: 3c59x 00:00:00:00:00:00 MAC failure Russell King
2004-09-29 16:52 ` Jeff Garzik
2004-09-29 15:58 ` Alan Cox
2004-09-29 17:07 ` Jeff Garzik
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