Re: Hot add a PCIe device driver upon hotplug event

[Paulo Fortuna Carvalho <pricardofc@gmail.com>]

Hello Helgas,
I cannot see that line in dmesg. I think that something else is missing...
Do you know what may cause that not appearing in dmesg? Hotplug Surprise?
Thx,
Paulo.

2015-01-12 16:58 GMT, Bjorn Helgaas <bhelgaas@google.com>:
> On Mon, Jan 12, 2015 at 5:42 AM, Paulo Fortuna Carvalho
> <pricardofc@gmail.com> wrote:
>> Hello,
>> I want to automatically load/unload a PCIe device driver when a card
>> is inserted/removed from the system. I can see in the system logger
>> with dmesg that the interrupt event is captured and acknowledged by
>> the pciehp hotplug service driver.
>> What I want to do next is that the operating system load/unload the
>> corresponding PCIe device driver for that card.
>
> When pciehp receives the interrupt, it should enumerate the device,
> and you should see a line in dmesg similar to this (of course, it will
> have different bus/device/function and different vendor/device IDs):
>
>   pci 0000:00:16.0: [8086:9c3a] type 00 class 0x078000
>
> The PCI core should then add the device using device_add(), and part
> of that is to emit a uevent, which can be read by user-space.
> Generally udev would handle the event and load the appropriate driver.
> I don't know the details of how the user-space side works.
>
> Bjorn
>