diff options
author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-08-26 13:57:57 -0400 |
---|---|---|
committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-08-26 18:13:13 -0400 |
commit | 480125ba49ba62be93beea37770f266846e077ab (patch) | |
tree | 6e4437d77e352f5b03d1e00171bd77086378b01a /drivers/pci/dmar.c | |
parent | 0444ad93ea2449963132d68753020a6a24d69895 (diff) |
x86, iommu: Make all IOMMU's detection routines return a value.
We return 1 if the IOMMU has been detected. Zero or an error number
if we failed to find it. This is in preperation of using the IOMMU_INIT
so that we can detect whether an IOMMU is present. I have not
tested this for regression on Calgary, nor on AMD Vi chipsets as
I don't have that hardware.
CC: Muli Ben-Yehuda <muli@il.ibm.com>
CC: "Jon D. Mason" <jdmason@kudzu.us>
CC: "Darrick J. Wong" <djwong@us.ibm.com>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Woodhouse <David.Woodhouse@intel.com>
CC: Chris Wright <chrisw@sous-sol.org>
CC: Yinghai Lu <yinghai@kernel.org>
CC: Joerg Roedel <joerg.roedel@amd.com>
CC: H. Peter Anvin <hpa@zytor.com>
CC: Fujita Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
LKML-Reference: <1282845485-8991-3-git-send-email-konrad.wilk@oracle.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'drivers/pci/dmar.c')
-rw-r--r-- | drivers/pci/dmar.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index 0a19708074c2..5fa64ea5416f 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c | |||
@@ -687,7 +687,7 @@ failed: | |||
687 | return 0; | 687 | return 0; |
688 | } | 688 | } |
689 | 689 | ||
690 | void __init detect_intel_iommu(void) | 690 | int __init detect_intel_iommu(void) |
691 | { | 691 | { |
692 | int ret; | 692 | int ret; |
693 | 693 | ||
@@ -723,6 +723,8 @@ void __init detect_intel_iommu(void) | |||
723 | } | 723 | } |
724 | early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size); | 724 | early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size); |
725 | dmar_tbl = NULL; | 725 | dmar_tbl = NULL; |
726 | |||
727 | return (ret ? 1 : -ENODEV); | ||
726 | } | 728 | } |
727 | 729 | ||
728 | 730 | ||