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[4/4] PCI: spear: Mark the msi cascade handler IRQF_NO_THREAD

Message ID 1437715776-2243-5-git-send-email-haokexin@gmail.com
State Changes Requested
Headers show

Commit Message

Kevin Hao July 24, 2015, 5:29 a.m. UTC 
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(-)
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Patch

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;