Stefano Stabellini
2009-Oct-05 13:41 UTC
[Xen-devel] [PATCH 9 of 12] backport 081501daceca74d2091e798d5dcd342c14d66d1a
Backport 081501daceca74d2091e798d5dcd342c14d66d1a from qemu upstream:
check for bs->drv in bdrv_flush (Christoph Hellwig)
---
diff -r 3053262ff0f2 block.c
--- a/block.c Fri Oct 02 13:39:04 2009 +0100
+++ b/block.c Fri Oct 02 14:51:14 2009 +0100
@@ -1071,6 +1071,8 @@
int bdrv_flush(BlockDriverState *bs)
{
int ret = 0;
+ if (!bs->drv)
+ return -EINVAL;
if (bs->drv->bdrv_flush)
ret = bs->drv->bdrv_flush(bs);
if (!ret && bs->backing_hd)
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