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| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2020-01-02 08:18:07 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-01-07 14:05:57 +0100 |
| commit | 39d630e332144028f56abba83d94291978e72df1 (patch) | |
| tree | 0a9654d6dc5c904b2e4cfd58549838a073d979bd /drivers | |
| parent | d62efd4fa62be50fa1ff4433a83b14c51d320a27 (diff) | |
| download | linux-stable-39d630e332144028f56abba83d94291978e72df1.tar.gz linux-stable-39d630e332144028f56abba83d94291978e72df1.tar.bz2 linux-stable-39d630e332144028f56abba83d94291978e72df1.zip | |
iommu/vt-d: Fix off-by-one in PASID allocation
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>
Diffstat (limited to 'drivers')
| -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 48205ab1fea4..9b32614910a5 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -334,7 +334,7 @@ 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); |