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PCI: aardvark: Check return value of generic_handle_domain_irq() when processing INTx IRQ

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commit 51f96e287c upstream.

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

Link: https://lore.kernel.org/r/20220110015018.26359-6-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pali Rohár
2022-05-04 18:57:39 +02:00
committed by Greg Kroah-Hartman
parent 95bd4e1087
commit 9e475a95c5
1 changed files with 3 additions and 1 deletions
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4
drivers/pci/controller/pci-aardvark.c
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@@ -1429,7 +1429,9 @@ 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');
}
}