[PATCH] powerpc/fsl_msi: mark the msi cascade handler IRQF_NO_THREAD

[PATCH] powerpc/fsl_msi: mark the msi cascade handler IRQF_NO_THREAD

[Kevin Hao]

The commit 543c043cbae7 ("powerpc/fsl_msi: change the irq handler from
chained to normal") changes the msi cascade handler from chained to
normal. Since cascade handler must run in hard interrupt context, this
will cause kernel panic if we force threading of all the interrupt
handler via kernel command parameter 'threadirqs'. So mark the irq
handler IRQF_NO_THREAD explicitly.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
 arch/powerpc/sysdev/fsl_msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index a5a6c24577fe..5997c5378c84 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -360,7 +360,7 @@ static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
 	cascade_data->virq = virt_msir;
 	msi->cascade_array[irq_index] = cascade_data;
 
-	ret = request_irq(virt_msir, fsl_msi_cascade, 0,
+	ret = request_irq(virt_msir, fsl_msi_cascade, IRQF_NO_THREAD,
 			  "fsl-msi-cascade", cascade_data);
 	if (ret) {
 		dev_err(&dev->dev, "failed to request_irq(%d), ret = %d\n",
-- 
1.9.3