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authorJulian Wiedmann <jwi@linux.ibm.com>2019-07-01 14:19:29 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2019-07-23 10:44:03 +0200
commit69e96207ebf90ff8d5bac457134b0d4569f6634e (patch)
treec5ea00973f5de96cd5cc5ed15684603b5ce86576 /Documentation
parenta6ec414a4dd529eeac5c3ea51c661daba3397108 (diff)
downloadlinux-69e96207ebf90ff8d5bac457134b0d4569f6634e.tar.bz2
s390/qdio: restrict QAOB usage to IQD unicast queues
The IQD mcast queue doesn't support QAOB mode, so skip the qdio_enable_async_operation() setup call for this queue. This avoids the allocation of an unneeded QAOB pointer array, and sets up q->use_cq properly so that drivers are prohibited from using QAOBs for mcast traffic. Take this opportunity to streamline the q->use_cq and aob != 0 checks. The path to qdio_siga_output() is straight-forward, we don't need to worry about being called with bad operands. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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