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Subject[PATCH 2/7] PCI: aardvark: Check for virq mapping when processing INTx IRQ
Date
It is possible that we receive spurious INTx interrupt. So add needed check
before calling generic_handle_irq() function.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Cc: stable@vger.kernel.org
---
drivers/pci/controller/pci-aardvark.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 36fcc077ec72..59f91fad2481 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1226,7 +1226,11 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie)
PCIE_ISR1_REG);

virq = irq_find_mapping(pcie->irq_domain, i);
- generic_handle_irq(virq);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_err_ratelimited(&pcie->pdev->dev, "unexpected INT%c IRQ\n",
+ (char)i+'A');
}
}

--
2.20.1
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