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Commit 41b3cf08 authored by Stephen M. Cameron's avatar Stephen M. Cameron Committed by Christoph Hellwig
Browse files

hpsa: set irq affinity hints to route MSI-X vectors across CPUs 



Signed-off-by: default avatarStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: default avatarMike Miller <michael.miller@canonical.com>
Reviewed-by: default avatarScott Teel <scott.teel@hp.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 072b0518

drivers/scsi/hpsa.c

+16 −1
Original line number Diff line number Diff line
@@ -6615,6 +6615,17 @@ static void hpsa_free_cmd_pool(struct ctlr_info *h) 
			h->ioaccel_cmd_pool, h->ioaccel_cmd_pool_dhandle);

}



static void hpsa_irq_affinity_hints(struct ctlr_info *h)

{

	int i, cpu, rc;



	cpu = cpumask_first(cpu_online_mask);

	for (i = 0; i < h->msix_vector; i++) {

		rc = irq_set_affinity_hint(h->intr[i], get_cpu_mask(cpu));

		cpu = cpumask_next(cpu, cpu_online_mask);

	}

}



static int hpsa_request_irq(struct ctlr_info *h,

	irqreturn_t (*msixhandler)(int, void *),

	irqreturn_t (*intxhandler)(int, void *))
@@ -6634,6 +6645,7 @@ static int hpsa_request_irq(struct ctlr_info *h, 
			rc = request_irq(h->intr[i], msixhandler,

					0, h->devname,

					&h->q[i]);

		hpsa_irq_affinity_hints(h);

	} else {

		/* Use single reply pool */

		if (h->msix_vector > 0 || h->msi_vector) {
@@ -6685,13 +6697,16 @@ static void free_irqs(struct ctlr_info *h) 
	if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {

		/* Single reply queue, only one irq to free */

		i = h->intr_mode;

		irq_set_affinity_hint(h->intr[i], NULL);

		free_irq(h->intr[i], &h->q[i]);

		return;

	}



	for (i = 0; i < h->msix_vector; i++)

	for (i = 0; i < h->msix_vector; i++) {

		irq_set_affinity_hint(h->intr[i], NULL);

		free_irq(h->intr[i], &h->q[i]);

	}

}



static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h)

{