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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-03-12 14:26:05 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-03-16 13:08:40 -0700 |
| commit | 400b9b93441cd4e2fe824a70140f3d5a2a9c802b (patch) | |
| tree | e508eed41dcc3132bddaaca8700217d1a86a86bb /drivers/iommu/iommu-sva.c | |
| parent | f7d304343b9d2456ffba23b99d2345408251ea45 (diff) | |
| download | linux-stable-400b9b93441cd4e2fe824a70140f3d5a2a9c802b.tar.gz linux-stable-400b9b93441cd4e2fe824a70140f3d5a2a9c802b.tar.bz2 linux-stable-400b9b93441cd4e2fe824a70140f3d5a2a9c802b.zip | |
iommu/sva: Replace pasid_valid() helper with mm_valid_pasid()
Kernel has few users of pasid_valid() and all but one checks if the
process has PASID allocated. The helper takes ioasid_t as the input.
Replace the helper with mm_valid_pasid() that takes mm_struct as the
argument. The only call that checks PASID that is not tied to mm_struct
is open-codded now.
This is preparatory patch. It helps avoid ifdeffery: no need to
dereference mm->pasid in generic code to check if the process has PASID.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20230312112612.31869-11-kirill.shutemov%40linux.intel.com
Diffstat (limited to 'drivers/iommu/iommu-sva.c')
| -rw-r--r-- | drivers/iommu/iommu-sva.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iommu/iommu-sva.c b/drivers/iommu/iommu-sva.c index 24bf9b2b58aa..4ee2929f0d7a 100644 --- a/drivers/iommu/iommu-sva.c +++ b/drivers/iommu/iommu-sva.c @@ -34,14 +34,14 @@ int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max) mutex_lock(&iommu_sva_lock); /* Is a PASID already associated with this mm? */ - if (pasid_valid(mm->pasid)) { + if (mm_valid_pasid(mm)) { if (mm->pasid < min || mm->pasid >= max) ret = -EOVERFLOW; goto out; } pasid = ioasid_alloc(&iommu_sva_pasid, min, max, mm); - if (!pasid_valid(pasid)) + if (pasid == INVALID_IOASID) ret = -ENOMEM; else mm_pasid_set(mm, pasid); |