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| author | Joerg Roedel <jroedel@suse.de> | 2014-08-21 23:06:48 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-08-26 11:15:17 +0200 |
| commit | c0df975f9045d6b2b13d88746e628ac308ff49ea (patch) | |
| tree | 48058cedcc8de6cea39c21949daa60059087b3c0 /drivers/iommu | |
| parent | iommu/core: Make iommu_group_get_for_dev() more robust (diff) | |
| download | linux-c0df975f9045d6b2b13d88746e628ac308ff49ea.tar.xz linux-c0df975f9045d6b2b13d88746e628ac308ff49ea.zip | |
iommu/vt-d: Check return value of acpi_bus_get_device()
Checking adev == NULL is not sufficient as
acpi_bus_get_device() might not touch the value of this
parameter in an error case, so check the return value
directly.
Fixes: ed40356b5fcf1ce28e026ab39c5b2b6939068b50
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/dmar.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 60ab474bfff3..06d268abe951 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -678,8 +678,7 @@ static int __init dmar_acpi_dev_scope_init(void) andd->device_name); continue; } - acpi_bus_get_device(h, &adev); - if (!adev) { + if (acpi_bus_get_device(h, &adev)) { pr_err("Failed to get device for ACPI object %s\n", andd->device_name); continue; |