We actually need one byte less (next_mb_id is exclusive, first_mb_id is
inclusive). Simplify.
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
drivers/virtio/virtio_mem.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index a1f5bf7a571a..670b3faf412d 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -257,8 +257,8 @@ static enum virtio_mem_mb_state virtio_mem_mb_get_state(struct virtio_mem *vm,
*/
static int virtio_mem_mb_state_prepare_next_mb(struct virtio_mem *vm)
{
- unsigned long old_bytes = vm->next_mb_id - vm->first_mb_id + 1;
- unsigned long new_bytes = vm->next_mb_id - vm->first_mb_id + 2;
+ unsigned long old_bytes = vm->next_mb_id - vm->first_mb_id;
+ unsigned long new_bytes = old_bytes + 1;
int old_pages = PFN_UP(old_bytes);
int new_pages = PFN_UP(new_bytes);
uint8_t *new_mb_state;
--
2.26.2
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