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

Message ID 1437715776-2243-4-git-send-email-haokexin@gmail.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
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/pci-exynos.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

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;