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Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lefzf-0069hi-Hp for linux-arm-kernel@lists.infradead.org; Thu, 06 May 2021 15:32:54 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5090E6140C; Thu, 6 May 2021 15:32:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620315168; bh=MTTPn1JuU+d3/eQ+Q7Ef/sfL+sWMGgOEsQXP78mZRIE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kslpnpwNQOUTAzurn5Gss4CnU3SYYP2rwxKtVz9ioqugqtuiH4OXS6sIpxE+JI/xf LMd1ClbrzJlXfcBZYlNaJT0aZlYZSHqjj2X0d2yP9u7/ZF6IL8snkqS76vrVf1fPR+ A5+D8ByYQDrCxORx+Zh22+kxRZzHVGvUhJJv+69M/fjDBpGJk1eFGEwQribgq00DDc vNcuaf3WCZTK4+OskzWUWLSnQiD6tTuGrz4y0U1NgR80opzxy6/HPeATRo4SYTazDW NoFjAcNtH5oYDkBXP35FvAzMFcGCDDCKCwI3mloPLkd2dUeWnUBnCoqknAxPJgjKZ4 bvuh+Ckpfi5fA== Received: by pali.im (Postfix) id 57DF8129A; Thu, 6 May 2021 17:32:47 +0200 (CEST) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Lorenzo Pieralisi , Thomas Petazzoni , Rob Herring , Bjorn Helgaas Cc: Russell King , =?utf-8?q?Marek_Beh=C3=BAn?= , Remi Pommarel , Xogium , Tomasz Maciej Nowak , Marc Zyngier , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 12/42] PCI: aardvark: Check for virq mapping when processing INTx IRQ Date: Thu, 6 May 2021 17:31:23 +0200 Message-Id: <20210506153153.30454-13-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210506153153.30454-1-pali@kernel.org> References: <20210506153153.30454-1-pali@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210506_083251_660148_E32CCA5B X-CRM114-Status: GOOD ( 10.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 Reviewed-by: Marek Behún Cc: stable@vger.kernel.org --- drivers/pci/controller/pci-aardvark.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 362faddae935..e7089db11f79 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1106,7 +1106,10 @@ 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(&pcie->pdev->dev, "unexpected INT%c IRQ\n", (char)i+'A'); } }