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 50ADF347BDB; Wed, 3 Dec 2025 16:00:25 +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=1764777625; cv=none; b=NYEgBgu0wNFTXtpJ7Fhrw8lAuMzzcMDO+T2S4T6hJvZ40WenVkYOmOw2dIQ2ImhsAA1mzrJ89h4dYT/uKqZ3sMrTKWd+a2oTeWfBaYDAsl0n+aTHQIlQowoVJRZ5OhAIwaC7LetomUOUXkQKj0C5Nmxm/s7CaUejA9fH3W35gzE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777625; c=relaxed/simple; bh=M2tkboxQMFaEl/jNfLVLW7hZn/7M7R2JIM1rgXl3Hhk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ltRu6AgIivIjcS2d2FVEJHdzu3GRtT0jc41EjQscXK9H0tBt2Qe+0vSujiQgN4jjrxo34VwsdiUiJoWZNc/AC8ETA4e8+d0xZfiL94NM4dGGDuIZQKQJ1Ce/VecLCfFxiSR3tVClLBaxpHwc3as4GH5ObfxYij82qGpUItp0SR8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=qfRbmHbS; 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="qfRbmHbS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B61E1C4CEF5; Wed, 3 Dec 2025 16:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764777625; bh=M2tkboxQMFaEl/jNfLVLW7hZn/7M7R2JIM1rgXl3Hhk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qfRbmHbSktYEV8yHPfI1igxvuJ7W6whmdQ0YFibllxcbRhRYBltBU4N3giH57pfP7 ab1FxEmv76lEAjuvEAdFoArVZi67Qvi5a4XGP8XVzuvLtGlSt9b6utSGpCvPqI/eBg 3ww+OmxFE6nXOmlOMyhNd4uEhD4qevGpF/LsKS6c= 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 5.15 094/392] PCI: Disable MSI on RDC PCI to PCIe bridges Date: Wed, 3 Dec 2025 16:24:04 +0100 Message-ID: <20251203152417.561531884@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152414.082328008@linuxfoundation.org> References: <20251203152414.082328008@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 5.15-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 ad0060759b18f..7cc346fff87e3 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2589,6 +2589,7 @@ 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