From: Pali Rohár Date: Wed, 4 May 2022 16:57:39 +0000 (+0200) Subject: PCI: aardvark: Check return value of generic_handle_domain_irq() when processing... X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9e475a95c59b9d01dc8eaecc386fc3877d35fd85;p=linux.git PCI: aardvark: Check return value of generic_handle_domain_irq() when processing INTx IRQ commit 51f96e287c6f003d3bb29672811c757c5fbf0028 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 Signed-off-by: Marek Behún Signed-off-by: Lorenzo Pieralisi Signed-off-by: Marek Behún Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 5d6ed7a3816ff..00fe1e6682ad0 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -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'); } }