[+cc Jiang, -cc willy@xxxxxx (defunct address), -cc t-kochi (I assume
also defunct)]
On Wed, Apr 17, 2013 at 9:27 PM, Gavin Guo <tuffkidtt@xxxxxxxxx> wrote:
> Hi All,
>
> I've a Dell platform which has PCI-to-USB card and would like to let
> the module be dynamically insmoded when hotplugging this card.
> Firstly, I've submitted a patch, which added acpiphp to the
> /etc/modules, to the init-module-tools package in the Debian system,
> but maintainer rejected to accept the patch and said it would be done
> in the kernel side to enable the automatically loading. Then, I've
> tried to read the code about acpiphp under drivers/pci/hotplug/* and
> found that acpiphp_ibm.c seems providing a hook to build the
> dependency with acpiphp.ko, providing a way to construct a empty
> ibm_handle_events-liked callback function, named dell_handle_events,
> for acpi_install_notify_handler and the acpiphp_dell.ko could be
> insmoded by udev through the MODULE_ALIAS("dmi*...") which describe
> the dell platform information. However, writing a code with fake empty
> function just to enable the hotplugging PCI is silly in my opinion, I
> would be appreciated if anyone could provide a method to enable the
> hotplugging automatically.
Please test linux-next (20130417 or later) with
CONFIG_HOTPLUG_PCI_ACPI=y and see if that works as you expect. That
contains Jiang's patch (that you mentioned in a your subsequent email)
which removes the option of building acpiphp as a module.
If that doesn't work, please let us know, along with more details,
such as a complete dmesg log. There are still known issues with
acpiphp, e.g., https://bugzilla.kernel.org/show_bug.cgi?id=54981, that
you might be seeing.
Bjorn
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