tree f03df0cfa7f24a156d289ce556cb76902a0a318a
parent 453f9a1652629e5805995b165be2e634c8487139
author Kevin Wolf <kwolf@redhat.com> 1277993331 +0200
committer Kevin Wolf <kwolf@redhat.com> 1278078252 +0200

block: Handle multiwrite errors only when all requests have completed

Don't try to be clever by freeing all temporary data and calling all callbacks
when the return value (an error) is certain. Doing so has at least two
important problems:

* The temporary data that is freed (qiov, possibly zero buffer) is still used
  by the requests that have not yet completed.
* Calling the callbacks for all requests in the multiwrite means for the caller
  that it may free buffers etc. which are still in use.

Just remember the error value and do the cleanup when all requests have
completed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>