linux-kernel - Re: PCIe Hotplugging not working

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Message-ID: <20111129142214.GC14845@kroah.com>
Date:	Tue, 29 Nov 2011 23:22:14 +0900
From:	Greg KH <greg@...ah.com>
To:	Anand Kanaginhal <anand_dk@...mail.com>
Cc:	Linux PCI mailing <linux-pci@...r.kernel.org>,
	linux kernel mailing <linux-kernel@...r.kernel.org>,
	linux hotplug mailing <linux-hotplug@...r.kernel.org>
Subject: Re: PCIe Hotplugging not working

On Tue, Nov 29, 2011 at 03:56:12AM -0800, Anand Kanaginhal wrote:
> 
> 
> I am trying to get PCIe endpoint hot - plugging working
> 
> The Set up is such that there is one endpoint (our custom device) connected to PCI  switch PLX 8609 8 port 8 lane switch. 
> 1. I have my driver module compiled, copied into /lib/modules/`uname -r`/kernel/drivers/char/

Why is a pci driver a "char" driver?  Do you have a pointer to the
source of this?

> 2. I run depmod and "modules.pcimap" also got updated with my module. 
> 
> However
>  if I unplug and plug in the endpoint, my driver .probe and .remove functions
>  are not being invoked. Is there something more to be done at the bus 
> level to get the driver to hot plug ?

You need a pci hotplug controller driver, is that loaded?  That is what
is responsible for eventually calling your remove function.

> I have tried various kernel version, Currently I am trying on 2.6.38.12 (UBUNTU flavor).

We can't help you with distro-specific kernels, please use a kernel.org
kernel and we will be glad to help you out.

greg k-h
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