s390x/pci: fix stpcifc_service_call
Firstly the function misses dmaas checking. This patch adds it. Secondly the function uses s390_pci_find_dev_by_fh() to look up the zpci device. This may fail if the guest provides a valid and disabled fh but fh of the associated zpci device is enabled. Thus we use s390_pci_find_dev_by_idx() instead. Signed-off-by: NYi Min Zhao <zyimin@linux.vnet.ibm.com> Reviewed-by: NPierre Morel <pmorel@linux.vnet.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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