diff mbox series

[15/17] PCI: aardvark: Check return value of generic_handle_domain_irq() when processing INTx IRQ

Message ID 20211208061851.31867-16-kabel@kernel.org
State New
Headers show
Series PCI: aardvark controller fixes BATCH 4 | expand

Commit Message

Marek Behún Dec. 8, 2021, 6:18 a.m. UTC 
From: Pali Rohár <pali@kernel.org>

It is possible that we receive spurious INTx interrupt. Check for the
return value of generic_handle_domain_irq() when processing INTx IRQ.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
---
 drivers/pci/controller/pci-aardvark.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index b3e64ae8c438..3cde3f761696 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1575,7 +1575,9 @@  static void advk_pcie_handle_int(struct advk_pcie *pcie)
 		advk_writel(pcie, PCIE_ISR1_INTX_ASSERT(i),
 			    PCIE_ISR1_REG);
 
-		generic_handle_domain_irq(pcie->irq_domain, i);
+		if (generic_handle_domain_irq(pcie->irq_domain, i) == -EINVAL)
+			dev_err_ratelimited(&pcie->pdev->dev, "unexpected INT%c IRQ\n",
+					    (char)i + 'A');
 	}
 }