s390x/pci: fix reg/dereg irq functions
Indicator refcounting interfaces are introduced. This patch fixes introducing unneeded indicator mappings and failure to release AISB mappings on deregistration. Signed-off-by: NYi Min Zhao <zyimin@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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