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block: Clean up after deleting BHs

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Commit 6a7ad299 ("Call qemu_bh_delete at bdrv_aio_bh_cb") deletes emulated
aio bottom halves to prevent endless accumulation.  However, it leaves a
stale ->bh pointer, which is then waited on when the aio is reused.

Zeroing the pointer fixes the issue, allowing vmdk format images to be used.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Avi Kivity 2009-06-23 16:20:36 +03:00 committed by Anthony Liguori
parent 0884657b2e
commit 36afc45159
1 changed files with 2 additions and 0 deletions
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2
block.c
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@ -1374,6 +1374,7 @@ static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb)
{
BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb;
qemu_bh_delete(acb->bh);
acb->bh = NULL;
qemu_aio_release(acb);
}
@ -1391,6 +1392,7 @@ static void bdrv_aio_bh_cb(void *opaque)
qemu_vfree(acb->bounce);
acb->common.cb(acb->common.opaque, acb->ret);
qemu_bh_delete(acb->bh);
acb->bh = NULL;
qemu_aio_release(acb);
}