[Qemu-devel] [PATCH v5 22/23] block: Relax bdrv_aligned_preadv() assertion

[Eric Blake <eblake@redhat.com>]

Now that bdrv_is_allocated accepts non-aligned inputs, we can
remove the TODO added in commit d6a644bb.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

---
v4-v5: no change
v3: new patch [Kevin]
---
 block/io.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/block/io.c b/block/io.c
index 8619f82eae..cf4217ec29 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1103,18 +1103,14 @@ static int coroutine_fn bdrv_aligned_preadv(BdrvChild *child,
     }

     if (flags & BDRV_REQ_COPY_ON_READ) {
-        /* TODO: Simplify further once bdrv_is_allocated no longer
-         * requires sector alignment */
-        int64_t start = QEMU_ALIGN_DOWN(offset, BDRV_SECTOR_SIZE);
-        int64_t end = QEMU_ALIGN_UP(offset + bytes, BDRV_SECTOR_SIZE);
         int64_t pnum;

-        ret = bdrv_is_allocated(bs, start, end - start, &pnum);
+        ret = bdrv_is_allocated(bs, offset, bytes, &pnum);
         if (ret < 0) {
             goto out;
         }

-        if (!ret || pnum != end - start) {
+        if (!ret || pnum != bytes) {
             ret = bdrv_co_do_copy_on_readv(child, offset, bytes, qiov);
             goto out;
         }
-- 
2.13.6