diff options
| -rw-r--r-- | drivers/nvme/host/pci.c | 7 | ||||
| -rw-r--r-- | include/linux/interrupt.h | 9 | ||||
| -rw-r--r-- | kernel/irq/affinity.c | 16 |
3 files changed, 21 insertions, 11 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 9bc585415d9b..21ffd671b6ed 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2081,12 +2081,11 @@ static void nvme_calc_io_queues(struct nvme_dev *dev, unsigned int irq_queues) static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues) { struct pci_dev *pdev = to_pci_dev(dev->dev); - int irq_sets[2]; struct irq_affinity affd = { - .pre_vectors = 1, - .nr_sets = ARRAY_SIZE(irq_sets), - .sets = irq_sets, + .pre_vectors = 1, + .nr_sets = 2, }; + unsigned int *irq_sets = affd.set_size; int result = 0; unsigned int irq_queues, this_p_queues; diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 35e7389c2011..5afdfd5dc39b 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -241,20 +241,23 @@ struct irq_affinity_notify { void (*release)(struct kref *ref); }; +#define IRQ_AFFINITY_MAX_SETS 4 + /** * struct irq_affinity - Description for automatic irq affinity assignements * @pre_vectors: Don't apply affinity to @pre_vectors at beginning of * the MSI(-X) vector space * @post_vectors: Don't apply affinity to @post_vectors at end of * the MSI(-X) vector space - * @nr_sets: Length of passed in *sets array - * @sets: Number of affinitized sets + * @nr_sets: The number of interrupt sets for which affinity + * spreading is required + * @set_size: Array holding the size of each interrupt set */ struct irq_affinity { unsigned int pre_vectors; unsigned int post_vectors; unsigned int nr_sets; - unsigned int *sets; + unsigned int set_size[IRQ_AFFINITY_MAX_SETS]; }; /** diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index 82e8799374e9..278289c091bb 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -238,9 +238,10 @@ static int irq_build_affinity_masks(const struct irq_affinity *affd, * Returns the irq_affinity_desc pointer or NULL if allocation failed. */ struct irq_affinity_desc * -irq_create_affinity_masks(unsigned int nvecs, const struct irq_affinity *affd) +irq_create_affinity_masks(unsigned int nvecs, struct irq_affinity *affd) { unsigned int affvecs, curvec, usedvecs, nr_sets, i; + unsigned int set_size[IRQ_AFFINITY_MAX_SETS]; struct irq_affinity_desc *masks = NULL; /* @@ -250,6 +251,9 @@ irq_create_affinity_masks(unsigned int nvecs, const struct irq_affinity *affd) if (nvecs == affd->pre_vectors + affd->post_vectors) return NULL; + if (WARN_ON_ONCE(affd->nr_sets > IRQ_AFFINITY_MAX_SETS)) + return NULL; + masks = kcalloc(nvecs, sizeof(*masks), GFP_KERNEL); if (!masks) return NULL; @@ -263,11 +267,15 @@ irq_create_affinity_masks(unsigned int nvecs, const struct irq_affinity *affd) */ affvecs = nvecs - affd->pre_vectors - affd->post_vectors; nr_sets = affd->nr_sets; - if (!nr_sets) + if (!nr_sets) { nr_sets = 1; + set_size[0] = affvecs; + } else { + memcpy(set_size, affd->set_size, nr_sets * sizeof(unsigned int)); + } for (i = 0, usedvecs = 0; i < nr_sets; i++) { - unsigned int this_vecs = affd->sets ? affd->sets[i] : affvecs; + unsigned int this_vecs = set_size[i]; int ret; ret = irq_build_affinity_masks(affd, curvec, this_vecs, @@ -314,7 +322,7 @@ unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec, unsigned int i; for (i = 0, set_vecs = 0; i < affd->nr_sets; i++) - set_vecs += affd->sets[i]; + set_vecs += affd->set_size[i]; } else { get_online_cpus(); set_vecs = cpumask_weight(cpu_possible_mask); |