linux-kernel - Re: mthca double free irqs

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Date:	Fri, 12 Jun 2009 21:30:34 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	"Barnes\, Jesse" <jesse.barnes@...el.com>,
	Matthew Wilcox <matthew@....cx>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, general@...ts.openfabrics.org,
	linux-kernel@...r.kernel.org
Subject: Re: mthca double free irqs

Something like this should help -- can you verify this fixes the double
free of irq?

 drivers/infiniband/hw/mthca/mthca_eq.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c
index 28f0e0c..90e4e45 100644
--- a/drivers/infiniband/hw/mthca/mthca_eq.c
+++ b/drivers/infiniband/hw/mthca/mthca_eq.c
@@ -641,9 +641,11 @@ static void mthca_free_irqs(struct mthca_dev *dev)
 	if (dev->eq_table.have_irq)
 		free_irq(dev->pdev->irq, dev);
 	for (i = 0; i < MTHCA_NUM_EQ; ++i)
-		if (dev->eq_table.eq[i].have_irq)
+		if (dev->eq_table.eq[i].have_irq) {
 			free_irq(dev->eq_table.eq[i].msi_x_vector,
 				 dev->eq_table.eq + i);
+			dev->eq_table.eq[i].have_irq = 0;
+		}
 }
 
 static int mthca_map_reg(struct mthca_dev *dev,
--
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