genirq/affinity: Remove the leftovers of the original set support

Now that the NVME driver is converted over to the calc_set() callback, the
workarounds of the original set support can be removed.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-nvme@lists.infradead.org
Cc: linux-pci@vger.kernel.org
Cc: Keith Busch <keith.busch@intel.com>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Shivasharan Srikanteshwara <shivasharan.srikanteshwara@broadcom.com>
Link: https://lkml.kernel.org/r/20190216172228.689834224@linutronix.de

kernel/irq/affinity.c

@@ -264,20 +264,13 @@ irq_create_affinity_masks(unsigned int nvecs, struct irq_affinity *affd)
 
 	/*
 	 * Simple invocations do not provide a calc_sets() callback. Install
-	 * the generic one. The check for affd->nr_sets is a temporary
-	 * workaround and will be removed after the NVME driver is converted
-	 * over.
+	 * the generic one.
 	 */
-	if (!affd->nr_sets && !affd->calc_sets)
+	if (!affd->calc_sets)
 		affd->calc_sets = default_calc_sets;
 
-	/*
-	 * If the device driver provided a calc_sets() callback let it
-	 * recalculate the number of sets and their size. The check will go
-	 * away once the NVME driver is converted over.
-	 */
-	if (affd->calc_sets)
-		affd->calc_sets(affd, affvecs);
+	/* Recalculate the sets */
+	affd->calc_sets(affd, affvecs);
 
 	if (WARN_ON_ONCE(affd->nr_sets > IRQ_AFFINITY_MAX_SETS))
 		return NULL;
@@ -344,11 +337,6 @@ unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
 
 	if (affd->calc_sets) {
 		set_vecs = maxvec - resv;
-	} else if (affd->nr_sets) {
-		unsigned int i;
-
-		for (i = 0, set_vecs = 0;  i < affd->nr_sets; i++)
-			set_vecs += affd->set_size[i];
 	} else {
 		get_online_cpus();
 		set_vecs = cpumask_weight(cpu_possible_mask);