From 515c2f431ebe561e69c57371b2c2217792b3b820 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Tue, 7 Jun 2016 15:51:28 +0200 Subject: [PATCH] block: Don't emulate natively supported pwritev flags Drivers that implement .bdrv_co_pwritev() get the flags passed as an argument to said function, but we also unconditionally emulate the flags anyway. We shouldn't do that. Fix this by clearing all flags that the driver supports natively after it returns from .bdrv_co_pwritev(). Fixes: 4df863f3 ('block: Make supported_write_flags a per-bds property') Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake --- block/io.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/io.c b/block/io.c index 9dc265b34d..fb99a7151c 100644 --- a/block/io.c +++ b/block/io.c @@ -816,7 +816,9 @@ static int coroutine_fn bdrv_driver_pwritev(BlockDriverState *bs, int ret; if (drv->bdrv_co_pwritev) { - ret = drv->bdrv_co_pwritev(bs, offset, bytes, qiov, flags); + ret = drv->bdrv_co_pwritev(bs, offset, bytes, qiov, + flags & bs->supported_write_flags); + flags &= ~bs->supported_write_flags; goto emulate_flags; } -- GitLab