diff options
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/iova_bitmap.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/vfio/iova_bitmap.c b/drivers/vfio/iova_bitmap.c index 6631e8befe1b..2dd65f040127 100644 --- a/drivers/vfio/iova_bitmap.c +++ b/drivers/vfio/iova_bitmap.c @@ -295,11 +295,15 @@ void iova_bitmap_free(struct iova_bitmap *bitmap) */ static unsigned long iova_bitmap_mapped_remaining(struct iova_bitmap *bitmap) { - unsigned long remaining; + unsigned long remaining, bytes; + + /* Cap to one page in the first iteration, if PAGE_SIZE unaligned. */ + bytes = !bitmap->mapped.pgoff ? bitmap->mapped.npages << PAGE_SHIFT : + PAGE_SIZE - bitmap->mapped.pgoff; remaining = bitmap->mapped_total_index - bitmap->mapped_base_index; remaining = min_t(unsigned long, remaining, - (bitmap->mapped.npages << PAGE_SHIFT) / sizeof(*bitmap->bitmap)); + bytes / sizeof(*bitmap->bitmap)); return remaining; } |