Merge tag 'mlx5-fixes-2023-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5 fixes 2023-05-31

This series provides bug fixes to mlx5 driver.

* tag 'mlx5-fixes-2023-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5: Read embedded cpu after init bit cleared
  net/mlx5e: Fix error handling in mlx5e_refresh_tirs
  net/mlx5: Ensure af_desc.mask is properly initialized
  net/mlx5: Fix setting of irq->map.index for static IRQ case
  net/mlx5: Remove rmap also in case dynamic MSIX not supported
====================

Link: https://lore.kernel.org/r/20230601031051.131529-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

3 files changed, 12 insertions, 14 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_common.c b/drivers/net/ethernet/mellanox/mlx5/core/en_common.c
index 1f90594499c60..41c396e764579 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_common.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_common.c
@@ -150,10 +150,8 @@ int mlx5e_refresh_tirs(struct mlx5e_priv *priv, bool enable_uc_lb,
 
 	inlen = MLX5_ST_SZ_BYTES(modify_tir_in);
 	in = kvzalloc(inlen, GFP_KERNEL);
-	if (!in) {
-		err = -ENOMEM;
-		goto out;
-	}
+	if (!in)
+		return -ENOMEM;
 
 	if (enable_uc_lb)
 		lb_flags = MLX5_TIRC_SELF_LB_BLOCK_BLOCK_UNICAST;
@@ -171,14 +169,13 @@ int mlx5e_refresh_tirs(struct mlx5e_priv *priv, bool enable_uc_lb,
 		tirn = tir->tirn;
 		err = mlx5_core_modify_tir(mdev, tirn, in);
 		if (err)
-			goto out;
+			break;
 	}
+	mutex_unlock(&mdev->mlx5e_res.hw_objs.td.list_lock);
 
-out:
 	kvfree(in);
 	if (err)
 		netdev_err(priv->netdev, "refresh tir(0x%x) failed, %d\n", tirn, err);
-	mutex_unlock(&mdev->mlx5e_res.hw_objs.td.list_lock);
 
 	return err;
 }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 2132a65106391..d6ee016deae17 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -923,7 +923,6 @@ static int mlx5_pci_init(struct mlx5_core_dev *dev, struct pci_dev *pdev,
 	}
 
 	mlx5_pci_vsc_init(dev);
-	dev->caps.embedded_cpu = mlx5_read_embedded_cpu(dev);
 	return 0;
 
 err_clr_master:
@@ -1155,6 +1154,7 @@ static int mlx5_function_setup(struct mlx5_core_dev *dev, bool boot, u64 timeout
 		goto err_cmd_cleanup;
 	}
 
+	dev->caps.embedded_cpu = mlx5_read_embedded_cpu(dev);
 	mlx5_cmd_set_state(dev, MLX5_CMDIF_STATE_UP);
 
 	mlx5_start_health_poll(dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
index db5687d9fec97..843da89a90350 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
@@ -141,7 +141,7 @@ static void irq_release(struct mlx5_irq *irq)
 	irq_update_affinity_hint(irq->map.virq, NULL);
 #ifdef CONFIG_RFS_ACCEL
 	rmap = mlx5_eq_table_get_rmap(pool->dev);
-	if (rmap && irq->map.index)
+	if (rmap)
 		irq_cpu_rmap_remove(rmap, irq->map.virq);
 #endif
 
@@ -232,12 +232,13 @@ struct mlx5_irq *mlx5_irq_alloc(struct mlx5_irq_pool *pool, int i,
 	if (!irq)
 		return ERR_PTR(-ENOMEM);
 	if (!i || !pci_msix_can_alloc_dyn(dev->pdev)) {
-		/* The vector at index 0 was already allocated.
-		 * Just get the irq number. If dynamic irq is not supported
-		 * vectors have also been allocated.
+		/* The vector at index 0 is always statically allocated. If
+		 * dynamic irq is not supported all vectors are statically
+		 * allocated. In both cases just get the irq number and set
+		 * the index.
 		 */
 		irq->map.virq = pci_irq_vector(dev->pdev, i);
-		irq->map.index = 0;
+		irq->map.index = i;
 	} else {
 		irq->map = pci_msix_alloc_irq_at(dev->pdev, MSI_ANY_INDEX, af_desc);
 		if (!irq->map.virq) {
@@ -570,11 +571,11 @@ int mlx5_irqs_request_vectors(struct mlx5_core_dev *dev, u16 *cpus, int nirqs,
 
 	af_desc.is_managed = false;
 	for (i = 0; i < nirqs; i++) {
+		cpumask_clear(&af_desc.mask);
 		cpumask_set_cpu(cpus[i], &af_desc.mask);
 		irq = mlx5_irq_request(dev, i + 1, &af_desc, rmap);
 		if (IS_ERR(irq))
 			break;
-		cpumask_clear(&af_desc.mask);
 		irqs[i] = irq;
 	}