From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: Faking a Hot-Unplug event in kernel 2.6
Date: Fri, 03 Jun 2005 08:11:44 +0000 [thread overview]
Message-ID: <20050603081144.GA30773@kroah.com> (raw)
In-Reply-To: <1e2adab7050602042131a92e85@mail.gmail.com>
On Thu, Jun 02, 2005 at 04:51:28PM +0530, Rajat Jain wrote:
> Hi,
>
> Please pardon me if this is not the right list for this post. I'm
> using 2.6 Kernel. I'm having a (Hot-pluggable) Qlogic HBA plugged into
> a PCI Express Slot.
There is a pci hotplug mailing list for Linux, if you have lots of
questions about this.
> I want to fake an hot-unplug event for this HBA, without physically
> removing it from the slot. Basically what I want is that while the HBA
> is still physically present at the slot, I want to fire a command /
> program that would fake the hot-unplug event for this slot, and thus
> will deregister the HBA from Linux. Ideally, I want to do this from
> userspace. But if it is not possible, then I can go for a kernel
> module as well.
Um, why not do it for real?
echo 0 > /sys/pci/slots/SLOTNAME/power
if you have a hotplug controller (and you say you do.)
> I think that this feature was made available by "Fake PCI Hot plug
> controller Driver", but I believe that can only be used if my system
> does not have REAL hot-plugging slots.
Well, the fake driver is for systems with no hotplug controllers.
> Can "Fake PCI Hot-plug
> Controller Driver (fakephp.ko)" and "PCI Express Hot-plug Controller
> Driver (pciehp.ko)" Co-exist ???
No, why would you want it to?
> (So that I can manually give fake unplug event and THEN remove the
> device; While hot-plugging, I want PCI Express HPC driver to take care
> of every thing)
Why would you want to do this?
> Is it possible to do what I am trying to do?
Only if you really want to confuse the kernel.
thanks,
greg k-h
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next prev parent reply other threads:[~2005-06-03 8:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-02 11:33 Faking a Hot-Unplug event in kernel 2.6 Rajat Jain
2005-06-03 6:08 ` Rajat Jain, Noida
2005-06-03 8:11 ` Greg KH [this message]
2005-07-25 2:30 ` Rajat Jain
2005-07-25 2:46 ` randy_dunlap
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