From patchwork Tue Sep 1 15:10:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 11748687 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D101D138A for ; Tue, 1 Sep 2020 15:16:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B9BFA2137B for ; Tue, 1 Sep 2020 15:16:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973405; bh=rcAnEbv7j0JSH/T+QJdGBSad0kuDwnM2WtUjOF/zEb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=u+YQ1c0pMX63kl0+rLGg1lLIn3/iHfb2nmMjeQUHSU5bs9G3Fmrc0H1oAbM/ahnSF AZIpCvxeqdYDodj/JJUtL1S4IlRgD9M5woGWIiQ16hRohmaI1YwiqlzHVf1XnqS/0g OlK7KkQW2QDN+3SyJ0Hv7Fh6lUEFPkWdx6Z2xKts= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729341AbgIAPQl (ORCPT ); Tue, 1 Sep 2020 11:16:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:33552 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729338AbgIAPQk (ORCPT ); Tue, 1 Sep 2020 11:16:40 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 817D8207D3; Tue, 1 Sep 2020 15:16:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973400; bh=rcAnEbv7j0JSH/T+QJdGBSad0kuDwnM2WtUjOF/zEb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yvy1L8O/Y0Hn4+LvU+k5ZY+Wqos96uHyZhiSABuckbL88zBuYrfL5EtdcJtOsW+95 Yp2T5m0bKyVtlTvJGDyqMUFKpY/YlF++b53rKEn7YYCjQ6s2wRO/v9kNpTb38Sw2Y3 ZBBN2afz7wfZGqaE9L9QCU7pFwJZQUTm91pQ7aX8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jason Baron , Borislav Petkov , Mauro Carvalho Chehab , linux-edac , Tony Luck , Sasha Levin Subject: [PATCH 4.9 32/78] EDAC/ie31200: Fallback if host bridge device is already initialized Date: Tue, 1 Sep 2020 17:10:08 +0200 Message-Id: <20200901150926.352567987@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150924.680106554@linuxfoundation.org> References: <20200901150924.680106554@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org From: Jason Baron [ Upstream commit 709ed1bcef12398ac1a35c149f3e582db04456c2 ] The Intel uncore driver may claim some of the pci ids from ie31200 which means that the ie31200 edac driver will not initialize them as part of pci_register_driver(). Let's add a fallback for this case to 'pci_get_device()' to get a reference on the device such that it can still be configured. This is similar in approach to other edac drivers. Signed-off-by: Jason Baron Cc: Borislav Petkov Cc: Mauro Carvalho Chehab Cc: linux-edac Signed-off-by: Tony Luck Link: https://lore.kernel.org/r/1594923911-10885-1-git-send-email-jbaron@akamai.com Signed-off-by: Sasha Levin --- drivers/edac/ie31200_edac.c | 50 ++++++++++++++++++++++++++++++++++--- 1 file changed, 47 insertions(+), 3 deletions(-) diff --git a/drivers/edac/ie31200_edac.c b/drivers/edac/ie31200_edac.c index 1c88d97074951..3438b98e60948 100644 --- a/drivers/edac/ie31200_edac.c +++ b/drivers/edac/ie31200_edac.c @@ -145,6 +145,8 @@ (n << (28 + (2 * skl) - PAGE_SHIFT)) static int nr_channels; +static struct pci_dev *mci_pdev; +static int ie31200_registered = 1; struct ie31200_priv { void __iomem *window; @@ -512,12 +514,16 @@ fail_free: static int ie31200_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { - edac_dbg(0, "MC:\n"); + int rc; + edac_dbg(0, "MC:\n"); if (pci_enable_device(pdev) < 0) return -EIO; + rc = ie31200_probe1(pdev, ent->driver_data); + if (rc == 0 && !mci_pdev) + mci_pdev = pci_dev_get(pdev); - return ie31200_probe1(pdev, ent->driver_data); + return rc; } static void ie31200_remove_one(struct pci_dev *pdev) @@ -526,6 +532,8 @@ static void ie31200_remove_one(struct pci_dev *pdev) struct ie31200_priv *priv; edac_dbg(0, "\n"); + pci_dev_put(mci_pdev); + mci_pdev = NULL; mci = edac_mc_del_mc(&pdev->dev); if (!mci) return; @@ -574,17 +582,53 @@ static struct pci_driver ie31200_driver = { static int __init ie31200_init(void) { + int pci_rc, i; + edac_dbg(3, "MC:\n"); /* Ensure that the OPSTATE is set correctly for POLL or NMI */ opstate_init(); - return pci_register_driver(&ie31200_driver); + pci_rc = pci_register_driver(&ie31200_driver); + if (pci_rc < 0) + goto fail0; + + if (!mci_pdev) { + ie31200_registered = 0; + for (i = 0; ie31200_pci_tbl[i].vendor != 0; i++) { + mci_pdev = pci_get_device(ie31200_pci_tbl[i].vendor, + ie31200_pci_tbl[i].device, + NULL); + if (mci_pdev) + break; + } + if (!mci_pdev) { + edac_dbg(0, "ie31200 pci_get_device fail\n"); + pci_rc = -ENODEV; + goto fail1; + } + pci_rc = ie31200_init_one(mci_pdev, &ie31200_pci_tbl[i]); + if (pci_rc < 0) { + edac_dbg(0, "ie31200 init fail\n"); + pci_rc = -ENODEV; + goto fail1; + } + } + return 0; + +fail1: + pci_unregister_driver(&ie31200_driver); +fail0: + pci_dev_put(mci_pdev); + + return pci_rc; } static void __exit ie31200_exit(void) { edac_dbg(3, "MC:\n"); pci_unregister_driver(&ie31200_driver); + if (!ie31200_registered) + ie31200_remove_one(mci_pdev); } module_init(ie31200_init);