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Date: Tue, 16 Aug 2011 19:26:11 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: John Baldwin <jhb@FreeBSD.org>
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Cc: "freebsd-current@freebsd.org" <freebsd-current@FreeBSD.org>,
	David Somayajulu <david.somayajulu@qlogic.com>
Subject: Re: Loading drivers via kldload
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The following are pure speculations, I'd rather let David speak, but just in case;

on 16/08/2011 18:45 John Baldwin said the following:
> Well, that would seem odd, still.  It only returns BUS_PROBE_GENERIC (not 0), so
> David's driver's probe routine should still be called to get a chance to attach to
> the device.

Maybe it doesn't do that exactly because device and vendor ID are zeroes as David
described earlier.

> Also, the ATA driver only allocates its BAR once, so it shouldn't
> trigger the panic in question in that case (the panic is only triggered when you
> try to double-allocate a BAR).

This makes only if the BAR has sane values.  Not sure what happens if the BAR has
some junk that duplicates other PCI device, or something like that.

-- 
Andriy Gapon