Re: [patch] IDE driver model update

From: Alexander Viro (
Date: Tue Oct 08 2002 - 07:24:15 EST

On 8 Oct 2002, Alan Cox wrote:

> On Tue, 2002-10-08 at 03:17, Alexander Viro wrote:
> > _ALL_ buses that have driverfs support (IDE, SCSI, USB, PCI) have their
> > own rules for lifetimes of their structures. And that's not likely to
> > change - these objects belong to drivers and in some cases (IDE) are
> > not even allocated dynamically - they are reused if nothing is holding
> > them.
> IDE objects can also outlast the hardware - consider an active mount on
> an ejected pcmcia card. Right now we don't do the right stuff to
> reconnect that on re-insert but one day we may need to. As it is we keep
> the instance around to avoid crashes

Ouch. That (reconnects) may require interesting things from queue-related
code. What behaviour do you want while card is disconnected? All requests
getting errors / all requests getting blocked / reads failing, writes blocking?

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