[Qemu-block] [PULL 21/31] block: assert that bs->request_alignment is a power of 2

[Kevin Wolf]

From: Peter Lieven <address@hidden>

at least bdrv_co_preadv/pwritev expect this.

Signed-off-by: Peter Lieven <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
 block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block.c b/block.c
index 736432f..f54bc25 100644
--- a/block.c
+++ b/block.c
@@ -1018,7 +1018,7 @@ static int bdrv_open_common(BlockDriverState *bs, 
BdrvChild *file,
 
     assert(bdrv_opt_mem_align(bs) != 0);
     assert(bdrv_min_mem_align(bs) != 0);
-    assert((bs->request_alignment != 0) || bdrv_is_sg(bs));
+    assert(is_power_of_2(bs->request_alignment) || bdrv_is_sg(bs));
 
     qemu_opts_del(opts);
     return 0;
-- 
1.8.3.1