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 A786529B78F; Fri, 21 Nov 2025 13:40:44 +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=1763732444; cv=none; b=OsSxRQ8SzwcsjdI2yLhKLm0wf0nAldH6kiFQQkONUAXpfhCRZjdr35G167jdG+S0jYEIbGgnvKT1oIyJhA9hYA5LXi6Lg7aJksVspq/UymOxr4efMS9DRpupXEEjpB+AWDkLeDnDi6VKqIY7o1Zgo6C6255eVf/gIugQjHQbj2c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763732444; c=relaxed/simple; bh=OGOL9FWEjUVsZ2eigwHupcEUxCimnu42iTHGMXt+30E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ne1Ukf9LX7mQK2S8aEd11kNavkvm+zsYcxqMaq45eJvI47Ew+XKzuCztruyl98wJ1wfOiaqXlybHja+ZC9V0NpzNjv7fycgRjhZAz7LJ4D0UJVAhdo2P8ckkM45lWz9QOec8jY+e5OpVcNNkn4d0TKmnSF/bkyP9YuV4FWCF36s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=t8zXWUCV; 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="t8zXWUCV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 293F0C4CEF1; Fri, 21 Nov 2025 13:40:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1763732444; bh=OGOL9FWEjUVsZ2eigwHupcEUxCimnu42iTHGMXt+30E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t8zXWUCVNiXZlDiMZd9//92/xlCpMEZiTcvIpylu1UcGlJDZwEVMJAC4D1Q5lauwW +ymiY/nfxE9E7ScVvq92HjAPKsBKUfwzPXszmuphMn4K1mXApoaNE5n4GCqzHTqPse SEAFaDxACufnYDHOzHFui7LpCM9OANNGN7xhO0HU= 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 6.6 123/529] PCI: Disable MSI on RDC PCI to PCIe bridges Date: Fri, 21 Nov 2025 14:07:02 +0100 Message-ID: <20251121130235.399520254@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121130230.985163914@linuxfoundation.org> References: <20251121130230.985163914@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 6.6-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 d67ea16e69e6a..aae702063ba3d 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2712,6 +2712,7 @@ 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