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From: Zhang Rui <rui.zhang@intel.com>
To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: trenn@suse.de, fseidel@suse.de, linux-acpi@vger.kernel.org,
	"Brown, Len" <len.brown@intel.com>,
	shaohua.li@intel.com
Subject: Re: [patch 0/2] acpi: driverregistration again can report ENODEV
Date: Wed, 25 Oct 2006 18:40:31 +0800	[thread overview]
Message-ID: <1161772831.14917.36.camel@localhost.localdomain> (raw)
In-Reply-To: <200610201055.33931.bjorn.helgaas@hp.com>

We won't have such issues if we make ACPI use driver model.
I've sent out a patch series which throw the legacy ACPI driver model
away. The patches will be added to -mm tree.

On Sat, 2006-10-21 at 00:55 +0800, Bjorn Helgaas wrote:
> > acpi_bus_register_driver must return -ENODEV when no device with
> > matching HID was found. E.g. battery also should currently get
> always
> > loaded even a system never has one.
> 
> If the driver wants to unload if it doesn't find any devices,
> it can easily do so by counting calls to its add() method, as
> asus_acpi.c currently does.  I don't think that's a good long-
> term solution, though.  I think it would be better to have a
> hotplug scheme that loads the driver when the hardware is
> found, like we do for PCI.
> 
that's true. With this patch series, .uevent method of ACPI bus will be
called when an ACPI device is found. Then udev script loads the right
driver by checking hid/cid offered by .uevent method. 

thanks,
Rui

  parent reply	other threads:[~2006-10-25 10:38 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-20  9:25 [patch 0/2] acpi: driverregistration again can report ENODEV fseidel
2006-10-20  9:25 ` [patch 1/2] " fseidel
2006-10-20  9:25 ` [patch 2/2] " fseidel
2006-10-20  9:59 ` [patch 0/2] " Thomas Renninger
2006-10-20 16:55   ` Bjorn Helgaas
2006-10-22 15:09     ` Thomas Renninger
2006-10-23 15:34       ` Bjorn Helgaas
2006-10-23 16:33         ` Frank Seidel
2006-10-24  9:05         ` Frank Seidel
2006-10-25 19:58           ` [patch] ACPI: asus_acpi: return -ENODEV when no device found Bjorn Helgaas
2006-10-26  9:22             ` Frank Seidel
2006-10-25 10:40     ` Zhang Rui [this message]
2006-10-25 11:31       ` [patch 0/2] acpi: driverregistration again can report ENODEV Thomas Renninger

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