This is the most talkative NIC driver in my .config:

cs89x0:cs89x0_probe(0x0)
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
PP_addr=0xffff
eth0: incorrect signature 0xffff
cs89x0: no cs8900 or cs8920 detected.  Be sure to disable PnP with SETUP

This patch makes these printks KERN_DEBUG

--- linux-2.6.5-rc1/drivers/net/cs89x0.c.orig	Wed Mar 17 22:54:08 2004
+++ linux-2.6.5-rc1/drivers/net/cs89x0.c	Fri Mar 26 00:52:30 2004
@@ -455,10 +455,10 @@
 		ioaddr &= ~3;
 		outw(PP_ChipID, ioaddr + ADD_PORT);
 	}
-printk("PP_addr=0x%x\n", inw(ioaddr + ADD_PORT));
+	printk(KERN_DEBUG "PP_addr=0x%x\n", inw(ioaddr + ADD_PORT));
 
 	if (inw(ioaddr + DATA_PORT) != CHIP_EISA_ID_SIG) {
-		printk(KERN_ERR "%s: incorrect signature 0x%x\n",
+		printk(KERN_DEBUG "%s: incorrect signature 0x%x\n",
 			dev->name, inw(ioaddr + DATA_PORT));
   		retval = -ENODEV;
   		goto out2;