On Tue, Oct 31, 2006 at 02:24:01PM -0500, James Bottomley wrote: > > Just for my own edification, what happens on the dual function (dual > channel) boards? We have two threads there and two separate I/O > processors. I assume a PCI error will kill both, Yes. > do we need to do > something about this? I'm not sure, and actually, I have not thought about or tested this case for the symbios. The answer depends on the h/w design. On PCI multi-function cards, the PCI reset callbacks will get called for each PCI function. (Each function gets to vote/veto how it wants te reset to proceed). If the hardware supports completely independent scsi host initialization for each scsi i/o processor, then things should just work. If some part of the card init sequence needs to run only once, even when there are two i/o processors, then this needs to be protected against. I presume that using if(0 == PCI_FUNC(pdev->devfn)) is enough to make sure the hardware initilization is called only once for the card -- i.e. by calling it only for PCI function zero. If there needs to be some additional locking to make sure that the card initialization completes before the i/o processor initialization starts ... well, I don't know about that. --linas - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
