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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-03-16 17:23:51 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-03-22 17:42:17 +0300 |
| commit | 8326c5d2057a06adb082f3547c5d1f75cfd33e57 (patch) | |
| tree | 4fcf1f78089cbc14093ca20ad9ba9d040e7d6e89 /drivers/iommu/dmar.c | |
| parent | 97da3854c526d3a6ee05c849c96e48d21527606c (diff) | |
| download | linux-8326c5d2057a06adb082f3547c5d1f75cfd33e57.tar.xz | |
iommu/dmar: Rectify return code handling in detect_intel_iommu()
There is inconsistency in return codes across the functions called from
detect_intel_iommu().
Make it consistent and propagate return code to the caller.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/dmar.c')
| -rw-r--r-- | drivers/iommu/dmar.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 36e3f430d265..edcf7410f736 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -551,7 +551,7 @@ static int __init dmar_table_detect(void) status = AE_NOT_FOUND; } - return (ACPI_SUCCESS(status) ? 1 : 0); + return ACPI_SUCCESS(status) ? 0 : -ENOENT; } static int dmar_walk_remapping_entries(struct acpi_dmar_header *start, @@ -891,17 +891,17 @@ int __init detect_intel_iommu(void) down_write(&dmar_global_lock); ret = dmar_table_detect(); - if (ret) - ret = !dmar_walk_dmar_table((struct acpi_table_dmar *)dmar_tbl, - &validate_drhd_cb); - if (ret && !no_iommu && !iommu_detected && !dmar_disabled) { + if (!ret) + ret = dmar_walk_dmar_table((struct acpi_table_dmar *)dmar_tbl, + &validate_drhd_cb); + if (!ret && !no_iommu && !iommu_detected && !dmar_disabled) { iommu_detected = 1; /* Make sure ACS will be enabled */ pci_request_acs(); } #ifdef CONFIG_X86 - if (ret) + if (!ret) x86_init.iommu.iommu_init = intel_iommu_init; #endif @@ -911,10 +911,9 @@ int __init detect_intel_iommu(void) } up_write(&dmar_global_lock); - return ret ? 1 : -ENODEV; + return ret ? ret : 1; } - static void unmap_iommu(struct intel_iommu *iommu) { iounmap(iommu->reg); |