mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

net/mlx5: Removing rmap per IRQ 

In next patches, IRQs will be requested according to demand, instead of
statically on driver boot.
Also, currently, rmap is managed by the IRQ layer. rmap management will
move out from the IRQ layer in future patches.

Therefore, we want to remove the IRQ from the rmap, when IRQ is destroyed,
instead of removing all the IRQs from the rmap when irq_table is destroyed.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Shay Drory 2021-02-23 11:08:26 +02:00 committed by Saeed Mahameed
parent 652e3581f2
commit 2de6153837
1 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
View File

@ -154,8 +154,14 @@ static void irq_release(struct kref *kref)
{
struct mlx5_irq *irq = container_of(kref, struct mlx5_irq, kref);
/* free_irq requires that affinity and rmap will be cleared
* before calling it. This is why there is asymmetry with set_rmap
* which should be called after alloc_irq but before request_irq.
*/
irq_set_affinity_hint(irq->irqn, NULL);
free_cpumask_var(irq->mask);
/* this line is releasing this irq from the rmap */
irq_set_affinity_notifier(irq->irqn, NULL);
free_irq(irq->irqn, &irq->nh);
}
@ -378,6 +384,11 @@ err_free_irq:
return err;
}
static void irq_table_clear_rmap(struct mlx5_irq_table *table)
{
cpu_rmap_put(table->rmap);
}
void mlx5_irq_table_destroy(struct mlx5_core_dev *dev)
{
struct mlx5_irq_table *table = dev->priv.irq_table;
@ -386,11 +397,7 @@ void mlx5_irq_table_destroy(struct mlx5_core_dev *dev)
if (mlx5_core_is_sf(dev))
return;
/* free_irq requires that affinity and rmap will be cleared
* before calling it. This is why there is asymmetry with set_rmap
* which should be called after alloc_irq but before request_irq.
*/
irq_clear_rmap(dev);
irq_table_clear_rmap(table);
for (i = 0; i < table->nvec; i++)
irq_release(&mlx5_irq_get(dev, i)->kref);
pci_free_irq_vectors(dev->pdev);