Messages in this thread | | | Date | Thu, 24 Oct 2002 20:18:19 -0400 (EDT) | From | "Scott Murray" <> | Subject | Re: [PATCH] [RFC] Advanced TCA SCSI Disk Hotswap |
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On Thu, 24 Oct 2002, Greg KH wrote:
> On Thu, Oct 24, 2002 at 07:00:23PM -0400, Scott Murray wrote: > > > > I've not implemented it yet, but I'm pretty sure I can detect surprise > > extractions in my cPCI driver. The only thing holding me back at the > > moment is that there's no clear way to report this status change via > > pcihpfs without doing something a bit funky like reporting "-1" in the > > "adapter" node. > > Why would you need to report anything other than if the card is present > or not? What would a "supprise" removal cause you to do differently?
Thinking about it a bit more, my idea to use -1 is indeed unnecessary, since userspace code can check if the adapter node changes to 0 before it itself writes a 0 to it. If multiple users/software play around with the nodes at the same time, they'll get what's coming to them...
> Hm, well I guess we should be extra careful in trying to shut down any > driver bound to that card...
Yeah, as Steven mentions in his reply, Linux drivers don't handle this well at the moment.
Scott
-- Scott Murray SOMA Networks, Inc. Toronto, Ontario e-mail: scottm@somanetworks.com
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