[PATCH 4/4] PCI: spear: 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/pcie-spear13xx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c
index c49fbdc0f6e4..338788b28631 100644
--- a/drivers/pci/host/pcie-spear13xx.c
+++ b/drivers/pci/host/pcie-spear13xx.c
@@ -280,7 +280,8 @@ static int spear13xx_add_pcie_port(struct pcie_port *pp,
 		return -ENODEV;
 	}
 	ret = devm_request_irq(dev, pp->irq, spear13xx_pcie_irq_handler,
-			       IRQF_SHARED, "spear1340-pcie", pp);
+			       IRQF_SHARED | IRQF_NO_THREAD,
+			       "spear1340-pcie", pp);
 	if (ret) {
 		dev_err(dev, "failed to request irq %d\n", pp->irq);
 		return ret;
-- 
2.1.0