Re: Dummy driver broken in pre-2.0.5

Alan Cox (
Sun, 19 May 1996 15:34:52 +0100 (BST)

> The reason, why I've changed the default return value of dev_open,
> was a problem with a lance based ethernet card. When the lance driver
> is unable to detect irq or dma, it leaves the device structure without
> putting an open function in it. This is ok, but the lance driver has
> already called ether_setup(), so it's possible to give the device
> an IP address. As soon as IP sends a packet to the driver, the kernel
> pancis.

The lance driver should add an open routine that returns -ENODEV. I've
backed your change out for the next diffs for Linus.