From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4997C26ED5E; Tue, 11 Nov 2025 01:09:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762823378; cv=none; b=AVL6iX7HsXSwfVFhu2t66Ygt79ncD7t2gF6Xzv62YVELf58Dj2CuD5Xao1J5TnY+4kkAYVDewbZMKmS+L8gxTKSDlQ6QB+ntgUxXiQOO3ptYtfw/qgPS4NK+RC6ZFXSFLeSN2/dW+WjPByl9UVoxlJ+yXyN8UbuHpbhcagfurKU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762823378; c=relaxed/simple; bh=He3eKPcpLM8NlRJcMVptUSQGTraR+EAhSuafU6FX9i0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Jh5thxG18etrNZwiSYnZjfUPV33qMyoU7EjwkTMZF1dEb4PH/+nnsIJmWZGMtMFcCGZgRQVqHYCW3wJvN5VzbUxIAzwGr4SZe0GmiwDuO1vzBHV0IExQW0vYrECRhRAmN2iva90sW0Plh8y5AD49Bi2uuW8NXaVqOXcA8RwCkjs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=K6CCtaPx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="K6CCtaPx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0D59C116B1; Tue, 11 Nov 2025 01:09:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762823378; bh=He3eKPcpLM8NlRJcMVptUSQGTraR+EAhSuafU6FX9i0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K6CCtaPxd3/vd5/gFxAl21cfjxZ5Gj64bp8ruJkldWzF65VOpux9FeMDmEL5OHGDq pEZ3Ub4eYn5o9ZxnRe0GxCRQ1gDiZpOtbOjXHC8pl3NDT7lDgFrn8ARyNY8yztTWXz bX+Y4bezm282bTCIRNTftEenApnW0ssiEVXYUpnA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Marcos Del Sol Vives , Bjorn Helgaas , Sasha Levin Subject: [PATCH 6.12 192/565] PCI: Disable MSI on RDC PCI to PCIe bridges Date: Tue, 11 Nov 2025 09:40:48 +0900 Message-ID: <20251111004531.247305531@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251111004526.816196597@linuxfoundation.org> References: <20251111004526.816196597@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marcos Del Sol Vives [ Upstream commit ebc7086b39e5e4f3d3ca82caaea20538c9b62d42 ] RDC PCI to PCIe bridges, present on Vortex86DX3 and Vortex86EX2 SoCs, do not support MSIs. If enabled, interrupts generated by PCIe devices never reach the processor. I have contacted the manufacturer (DM&P) and they confirmed that PCI MSIs need to be disabled for them. Signed-off-by: Marcos Del Sol Vives Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20250705233209.721507-1-marcos@orca.pet Signed-off-by: Sasha Levin --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index db609d26811ba..aa4733787cd7e 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2719,6 +2719,7 @@ static void quirk_disable_msi(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_RDC, 0x1031, quirk_disable_msi); /* * The APC bridge device in AMD 780 family northbridges has some random -- 2.51.0