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powerpc/fsl-msi: use a different lockclass for the cascade interrupt

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lockdep thinks that it might deadlock because it grabs a lock of the
same class while calling the generic_irq_handler(). This annotation will
inform lockdep that it will not.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Sebastian Andrzej Siewior 2013-04-02 15:33:36 +02:00 committed by Kumar Gala
parent a3ec3acd29
commit 58631ad120
1 changed files with 3 additions and 1 deletions
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4
arch/powerpc/sysdev/fsl_msi.c
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@ -333,6 +333,8 @@ static int fsl_of_msi_remove(struct platform_device *ofdev)
return 0;
}
static struct lock_class_key fsl_msi_irq_class;
static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
int offset, int irq_index)
{
@ -351,7 +353,7 @@ static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
dev_err(&dev->dev, "No memory for MSI cascade data\n");
return -ENOMEM;
}
irq_set_lockdep_class(virt_msir, &fsl_msi_irq_class);
msi->msi_virqs[irq_index] = virt_msir;
cascade_data->index = offset;
cascade_data->msi_data = msi;