From patchwork Thu May 7 17:20:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 1285512 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.de Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49J0bl2W6xz9sPF for ; Fri, 8 May 2020 03:20:51 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726308AbgEGRUp (ORCPT ); Thu, 7 May 2020 13:20:45 -0400 Received: from mx2.suse.de ([195.135.220.15]:49292 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726222AbgEGRUp (ORCPT ); Thu, 7 May 2020 13:20:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 1EA45AD93; Thu, 7 May 2020 17:20:45 +0000 (UTC) From: Nicolas Saenz Julienne To: Nicolas Saenz Julienne , Lorenzo Pieralisi , Rob Herring , Florian Fainelli , bcm-kernel-feedback-list@broadcom.com, Jeremy Linton , Andrew Murray , Jim Quinlan Cc: s.nawrocki@samsung.com, tim.gover@raspberrypi.com, Bjorn Helgaas , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] PCI: brcmstb: Assert fundamental reset on initialization Date: Thu, 7 May 2020 19:20:20 +0200 Message-Id: <20200507172020.18000-1-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org While preparing the driver for upstream this detail was missed. If not asserted during the initialization process, devices connected on the bus will not be made aware of the internal reset happening. This, potentially resulting in unexpected behavior. Fixes: c0452137034b ("PCI: brcmstb: Add Broadcom STB PCIe host controller driver") Signed-off-by: Nicolas Saenz Julienne Acked-by: Florian Fainelli --- drivers/pci/controller/pcie-brcmstb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 0b97b94c4a9a..795a03be4150 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -699,6 +699,7 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) /* Reset the bridge */ brcm_pcie_bridge_sw_init_set(pcie, 1); + brcm_pcie_perst_set(pcie, 1); usleep_range(100, 200);