From: Frank Seidel <fseidel@suse.de>
To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: trenn@suse.de, linux-acpi@vger.kernel.org,
Len Brown <len.brown@intel.com>, Andrew Morton <akpm@osdl.org>
Subject: Re: [patch] ACPI: asus_acpi: return -ENODEV when no device found
Date: Thu, 26 Oct 2006 11:22:41 +0200 [thread overview]
Message-ID: <200610261122.46254.fseidel@suse.de> (raw)
In-Reply-To: <200610251358.25379.bjorn.helgaas@hp.com>
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On Wednesday 25 October 2006 21:58, Bjorn Helgaas wrote:
> This driver is for non-hot-pluggable hardware. Therefore, if the
> hardware isn't present, we want to return -ENODEV so a module load
> will fail.
>
> We previously returned "result" from the acpi_bus_register_driver()
> call. Registering the driver usually succeeds even if no devices are
> present, because the ACPI core allows you to load a driver before a
> device is hot-added.
>
> Someday the kernel will expose enough information so user-space can
> tell what ACPI drivers should be loaded. But the kernel doesn't do
> that yet, so distros have to load this driver always and rely on the
> -ENODEV causing the load to fail if the hardware isn't found.
>
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Frank Seidel <fseidel@suse.de>
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next prev parent reply other threads:[~2006-10-26 9:22 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 [this message]
2006-10-25 10:40 ` [patch 0/2] acpi: driverregistration again can report ENODEV Zhang Rui
2006-10-25 11:31 ` Thomas Renninger
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