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From: "Pali Rohár" <pali@kernel.org>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh@kernel.org>
Cc: "Marek Behún" <kabel@kernel.org>, "Marc Zyngier" <maz@kernel.org>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/7] PCI: aardvark: Check for virq mapping when processing INTx IRQ
Date: Fri, 25 Jun 2021 11:03:14 +0200	[thread overview]
Message-ID: <20210625090319.10220-3-pali@kernel.org> (raw)
In-Reply-To: <20210625090319.10220-1-pali@kernel.org>

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


  parent reply	other threads:[~2021-06-25  9:05 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-25  9:03 [PATCH 0/7] PCI: aardvark: Interrupt fixes Pali Rohár
2021-06-25  9:03 ` [PATCH 1/7] PCI: aardvark: Do not touch status bits of masked interrupts in interrupt handler Pali Rohár
2021-06-25  9:03 ` Pali Rohár [this message]
2021-08-06  8:29   ` [PATCH 2/7] PCI: aardvark: Check for virq mapping when processing INTx IRQ Marc Zyngier
2021-08-23 16:33     ` Pali Rohár
2021-08-23 16:47       ` Marc Zyngier
2021-06-25  9:03 ` [PATCH 3/7] PCI: aardvark: Remove irq_mask_ack callback for INTx interrupts Pali Rohár
2021-06-25  9:03 ` [PATCH 4/7] PCI: aardvark: Don't mask irq when mapping Pali Rohár
2021-06-25  9:03 ` [PATCH 5/7] PCI: aardvark: Fix support for MSI interrupts Pali Rohár
2021-06-25  9:03 ` [PATCH 6/7] PCI: aardvark: Correctly clear and unmask all " Pali Rohár
2021-08-06  8:32   ` Marc Zyngier
2021-08-06  8:35     ` Pali Rohár
2021-08-23 16:42       ` Pali Rohár
2021-06-25  9:03 ` [PATCH 7/7] PCI: aardvark: Fix setting MSI address Pali Rohár
2021-08-05 17:35 ` [PATCH 0/7] PCI: aardvark: Interrupt fixes Pali Rohár

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