Re: [PATCH] add PCI ROMs to sysfs
From: Jon Smirl (jonsmirl_at_yahoo.com)
Date: 07/31/04
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Date: Sat, 31 Jul 2004 06:28:28 -0700 (PDT) To: Vojtech Pavlik <vojtech@suse.cz>
--- Vojtech Pavlik <vojtech@suse.cz> wrote:
> On Fri, Jul 30, 2004 at 02:53:25PM -0700, Jon Smirl wrote:
> > Here's another grungy thing I needed to do to PCI. Multi-headed
> video
>
> You can do that, but where is the problem with your probe function
> being
> called twice - once for each of the devices? You should be able to
> sort
> out which one is which rather easily.
I wrote this a while ago, but I believe the problem was that by
accepting two probes I get two hotplug ADD events that I can't tell
apart. This scheme avoids triggering hotplug. The other problem was
that the ADD events get started in parallel and I couldn't figure out
how to serialize them. The parallel hotplug programs got into a race to
see who could initialize the card first.
Now that I know more about hotplug I could modify the hotplug
parameters to indicate primary vs secondary and ignore the secondary
one. But this will still cause two apps to be started in parallel.
Another solution would be to modify the kernel API somehow to let me
suppress hotplug ADD/REMOVE on the secondary device.
=====
Jon Smirl
jonsmirl@yahoo.com
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- Previous message: Aneesh Kumar: "[ PATCH ] Alpha print the symbol of pc and ra during Oops"
- In reply to: Vojtech Pavlik: "Re: [PATCH] add PCI ROMs to sysfs"
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