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 0E14C302CD6; Mon, 1 Dec 2025 11:28:55 +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=1764588535; cv=none; b=HkfgheiBuGwXU86FYOvtgOffjeUJb8FambyVIjpM2gIIJuHv2QAwW4dD5G3Skb1mxL8IkHL1Gz9LC4W6MzUEYw+tuxopQ+ERF4f2iqkcibp0RaC1bmZB2KKyIwR7Q4HlfzinwjCSD0dYXxaE5CqfkI/HT13wOIxw7WlBs3p0TbI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764588535; c=relaxed/simple; bh=KOLNc2iihKjoW2H2wnAAxC9BgmzLLL8YM6okXLB+7E4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Xf0sEl3iH+Ab1FYRi2Y6Jchf0tz5x6ZzBhOAFSd53f3nM1+Dlbd6fXX1oKpOX42Hf+G2gp0/ovUmlNZl51adB+SMAyqchEVWRVzcBRATd5yMp/BhBcLKiwrhi9GF71Cmh+NEev0rUtoEmc3FLUdjw1ycJFh2M3lI26JCPIG3cmI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FKnnV/6z; 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="FKnnV/6z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B1C6C4CEF1; Mon, 1 Dec 2025 11:28:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764588534; bh=KOLNc2iihKjoW2H2wnAAxC9BgmzLLL8YM6okXLB+7E4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FKnnV/6zXuZ4SduMR1ZgiRJKO5ykyLG7wqzdteEXz56otsmmxa9uAeF1+nlPl4uHw BmtFnOYm11CfB0LQNqqgp2SqneiW9dZ2ZXHeN/FDIoJTeeMqgYDGFqP/AwjF8UBBPD 8kffDDuXLHMmYFIlFLxpz5d/3RHwVVMLy4dOYRdU= 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 5.4 049/187] PCI: Disable MSI on RDC PCI to PCIe bridges Date: Mon, 1 Dec 2025 12:22:37 +0100 Message-ID: <20251201112243.018195279@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251201112241.242614045@linuxfoundation.org> References: <20251201112241.242614045@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-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 2733ca94434dc..e9aed73cfd5f6 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2541,6 +2541,7 @@ 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