vfio/type1: fix dirty bitmap calculation in vfio_dma_rw

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The count of dirtied pages is not only determined by count of copied
pages, but also by the start offset.

e.g. if offset = PAGE_SIZE - 1, and *copied=2, the dirty pages count
is 2, instead of 1 or 0.

Fixes: d6a4c18566 ("vfio iommu: Implementation of ioctl for dirty pages tracking")
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Yan Zhao 2020-09-16 10:30:05 +08:00 • committed by Alex Williamson

parent 28b1302440

commit 2c5af98592

1 changed files with 2 additions and 1 deletions

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drivers/vfio/vfio_iommu_type1.c

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