tree 85981b663d364fea5fbf7f9cba9cecdf0e6abd35
parent 6c7f3756d072050d612e5c5c04108f90f1985435
author Christoph Hellwig <hch@lst.de> 1502965487 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1503619940 -0700

blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL

commit c005390374957baacbc38eef96ea360559510aa7 upstream.

While pci_irq_get_affinity should never fail for SMP kernel that
implement the affinity mapping, it will always return NULL in the
UP case, so provide a fallback mapping of all queues to CPU 0 in
that case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>