@@ -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,
+ .nr_sets = 2,
};
+ int *irq_sets = affd.set_vectors;
int result = 0;
unsigned int irq_queues, this_p_queues;
@@ -259,6 +259,8 @@ struct irq_affinity_notify {
void (*release)(struct kref *ref);
};
+#define IRQ_MAX_SETS 4
+
/**
* struct irq_affinity - Description for automatic irq affinity assignements
* @pre_vectors: Don't apply affinity to @pre_vectors at beginning of
@@ -266,13 +268,13 @@ struct irq_affinity_notify {
* @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
+ * @set_vectors: Number of affinitized sets
*/
struct irq_affinity {
int pre_vectors;
int post_vectors;
int nr_sets;
- int *sets;
+ int set_vectors[IRQ_MAX_SETS];
};
/**
@@ -332,7 +334,7 @@ extern int
irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
struct irq_affinity_desc *
-irq_create_affinity_masks(int nvec, const struct irq_affinity *affd);
+irq_create_affinity_masks(int nvec, struct irq_affinity *affd);
int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd);
@@ -239,7 +239,7 @@ 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(int nvecs, const struct irq_affinity *affd)
+irq_create_affinity_masks(int nvecs, struct irq_affinity *affd)
{
int affvecs = nvecs - affd->pre_vectors - affd->post_vectors;
int curvec, usedvecs;
@@ -265,11 +265,13 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
* have multiple sets, build each sets affinity mask separately.
*/
nr_sets = affd->nr_sets;
- if (!nr_sets)
+ if (!nr_sets) {
nr_sets = 1;
+ affd->set_vectors[0] = affvecs;
+ }
for (i = 0, usedvecs = 0; i < nr_sets; i++) {
- int this_vecs = affd->sets ? affd->sets[i] : affvecs;
+ int this_vecs = affd->set_vectors[i];
int ret;
ret = irq_build_affinity_masks(affd, curvec, this_vecs,
@@ -316,7 +318,7 @@ int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity
int i;
for (i = 0, set_vecs = 0; i < affd->nr_sets; i++)
- set_vecs += affd->sets[i];
+ set_vecs += affd->set_vectors[i];
} else {
get_online_cpus();
set_vecs = cpumask_weight(cpu_possible_mask);
Currently the array of irq set vectors is provided by driver. irq_create_affinity_masks() can be simplied a bit by treating the non-irq-set case as single irq set. So move this array into 'struct irq_affinity', and pre-define the max set number as 4, which should be enough for normal cases. Signed-off-by: Ming Lei <ming.lei@redhat.com> --- drivers/nvme/host/pci.c | 5 ++--- include/linux/interrupt.h | 8 +++++--- kernel/irq/affinity.c | 10 ++++++---- 3 files changed, 13 insertions(+), 10 deletions(-)