xen-blkback: fix shutdown race

Introduce a new variable to keep track of the number of in-flight
requests. We need to make sure that when xen_blkif_put is called the
request has already been freed and we can safely free xen_blkif, which
was not the case before.

Signed-off-by: Roger Pau Monné <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: David Vrabel <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]>
Tested-by: Matt Rushton <[email protected]>
Reviewed-by: Matt Rushton <[email protected]>
Cc: Matt Wilson <[email protected]>
Cc: Ian Campbell <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>

0 files changed, 0 insertions, 0 deletions