Besides zero check the number of unmapped page, also check
and handle iommu_unmap errors.
Cc: Alex Williamson <alex.william...@redhat.com>
Cc: Joerg Roedel <j...@8bytes.org>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
---
drivers/vfio/vfio_iommu_type1.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index e30e29a..c580518 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -677,7 +677,8 @@ static long vfio_unmap_unpin(struct vfio_iommu *iommu,
struct vfio_dma *dma,
}
while (iova < end) {
- size_t unmapped, len;
+ ssize_t unmapped;
+ size_t len;
phys_addr_t phys, next;
phys = iommu_iova_to_phys(domain->domain, iova);
@@ -699,7 +700,7 @@ static long vfio_unmap_unpin(struct vfio_iommu *iommu,
struct vfio_dma *dma,
}
unmapped = iommu_unmap(domain->domain, iova, len);
- if (WARN_ON(!unmapped))
+ if (WARN_ON(unmapped <= 0))
break;
unlocked += vfio_unpin_pages_remote(dma, iova,
--
1.8.3.1
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