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mlx4_core: Don't double-free IRQs when falling back from MSI-X to INTx 

When both MSI-X and legacy INTx fail to generate an interrupt, the
driver frees the MSI-X interrupts twice.  Fix this by clearing the
have_irq flag for the MSI-X interrupts when they are freed the first
time.  This is the same bug that was reported in ib_mthca by Yinghai
Lu <yhlu.kernel@gmail.com>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
hifive-unleashed-5.1
Roland Dreier 2009-06-14 13:30:45 -07:00
parent 9aa0a489d9
commit d1fdf24b40
1 changed files with 3 additions and 1 deletions
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4
drivers/net/mlx4/eq.c
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@ -497,8 +497,10 @@ static void mlx4_free_irqs(struct mlx4_dev *dev)
if (eq_table->have_irq)
free_irq(dev->pdev->irq, dev);
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
if (eq_table->eq[i].have_irq)
if (eq_table->eq[i].have_irq) {
free_irq(eq_table->eq[i].irq, eq_table->eq + i);
eq_table->eq[i].have_irq = 0;
}
kfree(eq_table->irq_names);
}