s390/vfio-ap: unpin pages on gisc registration failure

In the vfio_ap_irq_enable function, after the page containing the
notification indicator byte (NIB) is pinned, the function attempts
to register the guest ISC. If registration fails, the function sets the
status response code and returns without unpinning the page containing
the NIB. In order to avoid a memory leak, the NIB should be unpinned before
returning from the vfio_ap_irq_enable function.

Co-developed-by: Janosch Frank <[email protected]>
Signed-off-by: Janosch Frank <[email protected]>
Signed-off-by: Anthony Krowiak <[email protected]>
Reviewed-by: Matthew Rosato <[email protected]>
Fixes: 783f0a3ccd79 ("s390/vfio-ap: add s390dbf logging to the vfio_ap_irq_enable function")
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexander Gordeev <[email protected]>

0 files changed, 0 insertions, 0 deletions