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net/mlx4_core: Call synchronize_irq() before freeing EQ buffer

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After moving the EQ ownership to software effectively destroying it, call
synchronize_irq() to ensure that any handler routines running on other CPU
cores finish execution. Only then free the EQ buffer.
The same thing is done when we destroy a CQ which is one of the sources
generating interrupts. In the case of CQ we want to avoid completion handlers
on a CQ that was destroyed. In the case we do the same to avoid receiving
asynchronous events after the EQ has been destroyed and its buffers freed.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eli Cohen 2014-10-23 15:57:27 +03:00 committed by David S. Miller
parent 96e4be06cb
commit bf1bac5b78
1 changed files with 1 additions and 0 deletions
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drivers/net/ethernet/mellanox/mlx4/eq.c
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@ -1026,6 +1026,7 @@ static void mlx4_free_eq(struct mlx4_dev *dev,
pr_cont("\n"); pr_cont("\n");
} }
} }
synchronize_irq(eq->irq);
mlx4_mtt_cleanup(dev, &eq->mtt); mlx4_mtt_cleanup(dev, &eq->mtt);
for (i = 0; i < npages; ++i) for (i = 0; i < npages; ++i)