regression on HP zx1 platform from ACPI autoload modules patches

Doug Chapman
2007-07-30T22:57:18Z

I am seeing a regression on the HP ia64 zx1 platforms when using
a .config with CONFIG_IA64_HP_ZX1=y. Oddly it works OK with
CONFIG_IA64_GENERIC=y.

During bootup it panics with:

Kernel panic - not syncing: Unable to find SBA IOMMU: Try a generic or DIG kernel

I can provide the full console output if that is helpful. Also, please let
me know if there is any other data I can provide that would be helpful.

Using git bisect I have narrowed it down to these 2 commits. These commits
cannot be built separately as they appear to have code that depends on each
other.

commit 29b71a1ca74491fab9fed09e9d835d840d042690
Author: Thomas Renninger <trenn@suse.de>
Date: Mon Jul 23 14:43:51 2007 +0200

ACPI: autoload modules - Create ACPI alias interface

Modify modpost (file2alias.c) to add acpi*:XYZ0001: alias in modules.alias
like:
grep acpi /lib/modules/2.6.22-rc4-default/modules.alias
alias acpi*:SNY5001:* sony_laptop
alias acpi*:SNY6001:* sony_laptop
for e.g. the sony_laptop module.
This module matches against all ACPI devices with a HID or CID of SNY5001
or SNY6001

Export an uevent and modalias sysfs file containing the string:
[MODALIAS=]acpi:PNP0C0C:
additional CIDs are concatenated at the end.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Len Brown <len.brown@intel.com>

Author: Thomas Renninger <trenn@suse.de>
Date: Mon Jul 23 14:43:32 2007 +0200

ACPI: autoload modules - ACPICA modifications

Define standardized HIDs - Rename current acpi_device_id to acpica_device_id

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

- Doug