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net/mlx4_en: cq->irq_desc wasn't set in legacy EQ's

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Fix a regression introduced by commit 35f6f45 ("net/mlx4_en: Don't use
irq_affinity_notifier to track changes in IRQ affinity map").
When core is started in legacy EQ's (number of IRQ's < rx rings), cq->irq_desc
was NULL.  This caused a kernel crash under heavy traffic - when having more
than rx NAPI budget completions.
Fixed to have it set for both EQ modes.

Signed-off-by: Amir Vadai <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Amir Vadai 2014-07-16 13:33:50 +03:00 • committed by David S. Miller
commit 858e6c3210
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/mellanox/mlx4/en_cq.c
View file

@ -129,14 +129,15 @@ int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
name);
}
cq->irq_desc =
irq_to_desc(mlx4_eq_get_irq(mdev->dev,
cq->vector));
}
} else {
cq->vector = (cq->ring + 1 + priv->port) %
mdev->dev->caps.num_comp_vectors;
}
cq->irq_desc =
irq_to_desc(mlx4_eq_get_irq(mdev->dev,
cq->vector));
} else {
/* For TX we use the same irq per
ring we assigned for the RX */