From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE775C2B9F4 for ; Mon, 28 Jun 2021 15:04:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B1E5C61455 for ; Mon, 28 Jun 2021 15:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235535AbhF1PGx (ORCPT ); Mon, 28 Jun 2021 11:06:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:39798 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237169AbhF1PFV (ORCPT ); Mon, 28 Jun 2021 11:05:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B6D3A61CFB; Mon, 28 Jun 2021 14:43:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624891406; bh=t5jNJkaysKyIxKdaij9r6OjECbdg/3DgdVbquUKZwIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u5jj/QSM2lMtVvwf37cV9Ti2rch9qHB1H/rwM8XkLYwI+UBOkIIfYY5vCxS5ClO/r nzGYc7dEBY/TMNRUnW4ubH9+aLecutPTGeZVbKWZOtJYoJOru4fvg45L+avzhcufa3 hV7odDij+9ubtLswANKU8g/YpDXCsGT3PX6H/pFcWUCyZ97QqC9kUZOMIZdKkrsymT G6++XUmSkZHPfrckOUGU6gg5lLG0TqzexU5Rts3vjT3joe0J+ymjKvmDqsGilwBOjN rBr0MthmwtuH3kkbB1ShU0XLVvhhiOBE93hwaMQ9PWgpxMNUUwSPGY/IXSjWTEMMbh ylHKKG9FSMnsw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Antti=20J=C3=A4rvinen?= , Bjorn Helgaas , Kishon Vijay Abraham I , Greg Kroah-Hartman Subject: [PATCH 4.4 33/57] PCI: Mark TI C667X to avoid bus reset Date: Mon, 28 Jun 2021 10:42:32 -0400 Message-Id: <20210628144256.34524-34-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210628144256.34524-1-sashal@kernel.org> References: <20210628144256.34524-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.274-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-4.4.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 4.4.274-rc1 X-KernelTest-Deadline: 2021-06-30T14:42+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Antti Järvinen commit b5cf198e74a91073d12839a3e2db99994a39995d upstream. Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS automatically disables LTSSM when Secondary Bus Reset is received and device stops working. Prevent bus reset for these devices. With this change, the device can be assigned to VMs with VFIO, but it will leak state between VMs. Reference: https://e2e.ti.com/support/processors/f/791/t/954382 Link: https://lore.kernel.org/r/20210315102606.17153-1-antti.jarvinen@gmail.com Signed-off-by: Antti Järvinen Signed-off-by: Bjorn Helgaas Reviewed-by: Kishon Vijay Abraham I Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/quirks.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index bc0aa0849e72..d6199776c0f6 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3157,6 +3157,16 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset); +/* + * Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS + * automatically disables LTSSM when Secondary Bus Reset is received and + * the device stops working. Prevent bus reset for these devices. With + * this change, the device can be assigned to VMs with VFIO, but it will + * leak state between VMs. Reference + * https://e2e.ti.com/support/processors/f/791/t/954382 + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0xb005, quirk_no_bus_reset); + static void quirk_no_pm_reset(struct pci_dev *dev) { /* -- 2.30.2