tree 5c12cbd48d40a4f27a7ea04dd4a2b04ef1485e8a
parent 63db0f0eee3c0b2cc3a06b36daf50c4e7801ea1b
author Paolo Bonzini <pbonzini@redhat.com> 1319540013 +0200
committer Kevin Wolf <kwolf@redhat.com> 1319822752 +0200

scsi: do not call transfer_data after canceling a request

Otherwise, if cancellation is "faked" by the AIO layer and goes
through qemu_aio_flush, the whole request is completed synchronously
during scsi_req_cancel.

Using the enqueued flag would work here, but not in the next patches,
so I'm introducing a new io_canceled flag.  That's because scsi_req_data
is a synchronous callback and the enqueued flag might be reset by the
time it returns.  scsi-disk cannot unref the request until after calling
scsi_req_data.

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