Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

Fiona's virtio-scsi TMF deadlock fix.

Paolo: I merged the scsi fix in my block tree, but realize now that it belongs
to the scsi subsystem. Sorry about that, I'll be more careful next time. Please
reply if you want to handle this patch yourself.

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* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
  hw/scsi: avoid deadlock upon TMF request cancelling with VirtIO

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>