diff options
| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2020-01-02 08:18:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-24 08:36:26 +0100 |
| commit | 9b743915bd0085caaf314c74929f57fad5852cd6 (patch) | |
| tree | 4e0d20b1748e09988dd9c0368c244f7920615f85 /drivers/iommu | |
| parent | 739abce96dd0453724e06f34a71c99877729d747 (diff) | |
iommu/vt-d: Fix off-by-one in PASID allocation
[ Upstream commit 39d630e332144028f56abba83d94291978e72df1 ]
PASID allocator uses IDR which is exclusive for the end of the
allocation range. There is no need to decrement pasid_max.
Fixes: af39507305fb ("iommu/vt-d: Apply global PASID in SVA")
Reported-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-svm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index dca88f9fdf29..ff7a3f9add32 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -317,7 +317,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ /* Do not use PASID 0 in caching mode (virtualised IOMMU) */ ret = intel_pasid_alloc_id(svm, !!cap_caching_mode(iommu->cap), - pasid_max - 1, GFP_KERNEL); + pasid_max, GFP_KERNEL); if (ret < 0) { kfree(svm); kfree(sdev); |