net/mlx5: Fix indexing of mlx5_irq

After the cited patch, mlx5_irq xarray index can be different then
mlx5_irq MSIX table index.
Fix it by storing both mlx5_irq xarray index and MSIX table index.

Fixes: 3354822 ("net/mlx5: Use dynamic msix vectors allocation")
Signed-off-by: Shay Drory <[email protected]>
Reviewed-by: Eli Cohen <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>

Orabug: 35383105

(cherry picked from commit 1da438c)
cherry-pick-repo=kernel/git/torvalds/linux.git

Conflicts:
	drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c

Small conflict in a context caused by already applied fix.

Signed-off-by: Mikhael Goikhman <[email protected]>
Signed-off-by: Qing Huang <[email protected]>
Reviewed-by: Devesh Sharma <[email protected]>
Signed-off-by: Brian Maly <[email protected]>

Author: shayshyi

drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c

@@ -32,6 +32,7 @@ struct mlx5_irq {
 	struct mlx5_irq_pool *pool;
 	int refcount;
 	struct msi_map map;
+	u32 pool_index;
 };
 
 struct mlx5_irq_table {
@@ -152,7 +153,7 @@ static void irq_release(struct mlx5_irq *irq)
 {
 	struct mlx5_irq_pool *pool = irq->pool;
 
-	xa_erase(&pool->irqs, irq->map.index);
+	xa_erase(&pool->irqs, irq->pool_index);
 	mlx5_system_free_irq(irq);
 	free_cpumask_var(irq->mask);
 	kfree(irq);
@@ -283,11 +284,11 @@ struct mlx5_irq *mlx5_irq_alloc(struct mlx5_irq_pool *pool, int i,
 	}
 	irq->pool = pool;
 	irq->refcount = 1;
-	irq->map.index = i;
-	err = xa_err(xa_store(&pool->irqs, irq->map.index, irq, GFP_KERNEL));
+	irq->pool_index = i;
+	err = xa_err(xa_store(&pool->irqs, irq->pool_index, irq, GFP_KERNEL));
 	if (err) {
 		mlx5_core_err(dev, "Failed to alloc xa entry for irq(%u). err = %d\n",
-			      irq->map.index, err);
+			      irq->pool_index, err);
 		goto err_xa;
 	}
 	return irq;