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

Message ID 1465377417-5012-22-git-send-email-kwolf@redhat.com
State New
Headers show

Commit Message

Kevin Wolf June 8, 2016, 9:16 a.m. UTC 
From: Peter Lieven <pl@kamp.de>

at least bdrv_co_preadv/pwritev expect this.

Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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;