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net/mlx5_core: Fix race in create EQ

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After the EQ is created, it can possibly generate interrupts and the interrupt
handler is referencing eq->dev. It is therefore required to set eq->dev before
calling request_irq() so if an event is generated before request_irq() returns,
we will have a valid eq->dev field.

Signed-off-by: Eli Cohen <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eli Cohen 2014-11-06 12:51:21 +02:00 • committed by David S. Miller
commit a158906dd7
1 changed files with 3 additions and 4 deletions
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7
drivers/net/ethernet/mellanox/mlx5/core/eq.c
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@ -374,15 +374,14 @@ int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
snprintf(eq->name, MLX5_MAX_EQ_NAME, "%s@pci:%s",
name, pci_name(dev->pdev));
eq->eqn = out.eq_number;
eq->irqn = vecidx;
eq->dev = dev;
eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
err = request_irq(table->msix_arr[vecidx].vector, mlx5_msix_handler, 0,
eq->name, eq);
if (err)
goto err_eq;
eq->irqn = vecidx;
eq->dev = dev;
eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
err = mlx5_debug_eq_add(dev, eq);
if (err)
goto err_irq;