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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2013-04-02 13:33:36 (GMT)
committerKumar Gala <galak@kernel.crashing.org>2013-04-03 16:42:48 (GMT)
commit58631ad1205677c5b33f511fd5aae26eaa0c87c6 (patch)
treeda2855368389e78abed99744ac2c4ca23ea138dc
parenta3ec3acd29e3b372d79b81a534e1f4b10fc140f7 (diff)
downloadlinux-58631ad1205677c5b33f511fd5aae26eaa0c87c6.tar.xz
powerpc/fsl-msi: use a different lockclass for the cascade interrupt
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>
-rw-r--r--arch/powerpc/sysdev/fsl_msi.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index 178c994..ab02db3 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -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;