[PATCH 3/4] PCI: exynos: Mark the msi cascade handler IRQF_NO_THREAD

[Kevin Hao <haokexin@gmail.com>]

The cascade handler must run in hard interrupt context, otherwise
it will cause dead lock if we force threading of all the interrupt
handlers via kernel command parameter "threadirqs".

Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
 drivers/pci/host/pci-exynos.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
index f9f468d9a819..7b6be7791d33 100644
--- a/drivers/pci/host/pci-exynos.c
+++ b/drivers/pci/host/pci-exynos.c
@@ -523,7 +523,8 @@ static int __init exynos_add_pcie_port(struct pcie_port *pp,
 
 		ret = devm_request_irq(&pdev->dev, pp->msi_irq,
 					exynos_pcie_msi_irq_handler,
-					IRQF_SHARED, "exynos-pcie", pp);
+					IRQF_SHARED | IRQF_NO_THREAD,
+					"exynos-pcie", pp);
 		if (ret) {
 			dev_err(&pdev->dev, "failed to request msi irq\n");
 			return ret;
-- 
2.1.0