From: Thomas Renninger <trenn@suse.de>
Date: Fri, 29 Jan 2010 16:48:52 +0000 (+0100)
Subject: ACPI: acpi_bus_{scan,bus,add}: return -ENODEV if no device was found
X-Git-Tag: v2.6.33~32^2^7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7779688fc3d1ceddad84846a7b0affbe8e78ec6e;p=pandora-kernel.git

ACPI: acpi_bus_{scan,bus,add}: return -ENODEV if no device was found

Callers (acpi_memhotplug.c, dock.c and others) check for the return
value of acpi_bus_add() and assume a valid device was returned in
case zero was returned.

Thus return -ENODEV if no device was found in acpi_bus_scan and
propagate this through acpi_bus_add and acpi_bus_start.

Also remove a confusing comment in acpiphp_glue.c, acpi_bus_scan
will and cannot invoke if acpi_bus_add returns no valid device.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---

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