I think this is fixed in the 3.1.19 drivers 

Forum: PCMCIA Network Adapter Issues
Re: Network card doesn't work after warm boot Win98->Linux (Bernd Eggink)
Date: 2000, Jul 24
From: David Hinds <dhinds@pcmcia.sourceforge.org>

Give that a try. -- Dave

to: "I think this is fixed in the 3.1.19 drivers"