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authorBjorn Helgaas <bjorn.helgaas@hp.com>2010-03-24 19:44:33 +0300
committerLen Brown <len.brown@intel.com>2010-04-04 07:32:07 +0400
commitb7b30de53aef6ce773d34837ba7d8422bd3baeec (patch)
treee9a9b9665139c67ccb15b99951516819cb22b6b5 /drivers/scsi/megaraid/megaraid_sas.c
parent2eaa9cfdf33b8d7fb7aff27792192e0019ae8fc6 (diff)
downloadlinux-b7b30de53aef6ce773d34837ba7d8422bd3baeec.tar.xz
ACPI: use _HID when supplied by root-level devices
Previously, we assumed the only Device object immediately below the root was the \_SB Scope (which the ACPI CA treats as a Device), so we forced the HID of all such objects to ACPI_BUS_HID ("LNXSYBUS"). However, there are DSDTs that supply root-level Device objects with _HIDs. This patch makes us pay attention to those _HIDs and only add the synthetic ACPI_BUS_HID for root-level objects that do not supply their own _HID. For example, this DSDT: https://bugzilla.kernel.org/show_bug.cgi?id=15605 contains: Scope (_SB) { ... } Device (AMW0) { Name (_HID, EisaId ("PNP0C14")) ... } and we should use "PNP0C14" for the AMW0 device, not "LNXSYBUS". Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Acked-by: Zhang Rui <rui.zhang@intel.com> Tested-by: Yong Wang <yong.y.wang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_sas.c')
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