powerpc/fsl_msi: mark the msi cascade handler IRQF_NO_THREAD

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>
Signed-off-by: Scott Wood <scottwood@freescale.com>

diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index de40b48b460e83a8aaec5168c8a4a1f025d8dd38..da08ed08815751cec116164e8f6d3e828bda9fd4 100644 (file)
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -361,7 +361,7 @@ 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",