From patchwork Mon Mar 11 13:31:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 1054436 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="oM4pJG36"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44HzXd1cqsz9sN8 for ; Tue, 12 Mar 2019 00:31:45 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727626AbfCKNbi (ORCPT ); Mon, 11 Mar 2019 09:31:38 -0400 Received: from mta-01.yadro.com ([89.207.88.251]:50964 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727320AbfCKNbi (ORCPT ); Mon, 11 Mar 2019 09:31:38 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 83F5F419F2; Mon, 11 Mar 2019 13:31:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1552311094; x=1554125495; bh=gIXHQd009lpgxVuce3TuU6iKAvHLcp7oViQ HqJBpuOY=; b=oM4pJG36orAJjiug6BYUzXbId0D5PFADFlr/4h8ZfTx38dKbx8l EMvV+bQtqy/ucfBuD0pSq2BC9JUJ7HFTfJ++k373X8nyTvOjEDRBSZaiita/zvu+ 1uvac+IgDPNRR/OiYOFLb0zySjWKjRQ2VKIkYOqkzdqnPEHQCnMrFIh0= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5w5el8JkOmmg; Mon, 11 Mar 2019 16:31:34 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id BAC9D41992; Mon, 11 Mar 2019 16:31:31 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 11 Mar 2019 16:31:31 +0300 From: Sergey Miroshnichenko To: , CC: Bjorn Helgaas , , Sergey Miroshnichenko Subject: [PATCH RFC v4 07/21] PCI: Wake up bridges during rescan when movable BARs enabled Date: Mon, 11 Mar 2019 16:31:08 +0300 Message-ID: <20190311133122.11417-8-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190311133122.11417-1-s.miroshnichenko@yadro.com> References: <20190311133122.11417-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.15.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use the PM runtime methods to wake up the bridges before accessing their config space. Signed-off-by: Sergey Miroshnichenko --- drivers/pci/probe.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 88350dd56344..dc935f82a595 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -3252,6 +3252,8 @@ static void pci_bus_rescan_prepare(struct pci_bus *bus) { struct pci_dev *dev; + pm_runtime_get_sync(&bus->dev); + list_for_each_entry(dev, &bus->devices, bus_list) { struct pci_bus *child = dev->subordinate; @@ -3278,6 +3280,8 @@ static void pci_bus_rescan_done(struct pci_bus *bus) dev->driver->rescan_done(dev); } } + + pm_runtime_put(&bus->dev); } /**