Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 391D4C41535 for ; Mon, 15 Nov 2021 18:22:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24AC263326 for ; Mon, 15 Nov 2021 18:22:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241145AbhKOSYf (ORCPT ); Mon, 15 Nov 2021 13:24:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:46320 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237517AbhKORcf (ORCPT ); Mon, 15 Nov 2021 12:32:35 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2A098632AE; Mon, 15 Nov 2021 17:20:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636996859; bh=B8xlh5f37BRK0juDXELLjso8XTlpeEs1RRGGLw6bQ9w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zaYirD6j4OnKjoDTo01lE2s/tBbPcQXS2ePy6qLYMxh3jDqxWZNrN7vN/5Y/AjT2W WdrX3hLn9Xy6njgdZBgtWZGEKtgPESf5flzf98Cyfgl5BBxrS98lpC7+4mJm8XEXr7 9Ys5LoLbkG3g6U9ydppjn+QEIIaKgn9+B8yFxX/Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Pali=20Roh=C3=A1r?= , =?UTF-8?q?Marek=20Beh=C3=BAn?= , Lorenzo Pieralisi , Sasha Levin Subject: [PATCH 5.4 294/355] PCI: aardvark: Fix preserving PCI_EXP_RTCTL_CRSSVE flag on emulated bridge Date: Mon, 15 Nov 2021 18:03:38 +0100 Message-Id: <20211115165323.233902768@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165313.549179499@linuxfoundation.org> References: <20211115165313.549179499@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pali Rohár [ Upstream commit d419052bc6c60fa4ab2b5a51d5f1e55a66e2b4ff ] Commit 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value") started using CRSSVE flag for handling CRS responses. PCI_EXP_RTCTL_CRSSVE flag is stored only in emulated config space buffer and there is handler for PCI_EXP_RTCTL register. So every read operation from config space automatically clears CRSSVE flag as it is not defined in PCI_EXP_RTCTL read handler. Fix this by reading current CRSSVE bit flag from emulated space buffer and appending it to PCI_EXP_RTCTL read response. Link: https://lore.kernel.org/r/20211005180952.6812-5-kabel@kernel.org Fixes: 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value") Signed-off-by: Pali Rohár Signed-off-by: Marek Behún Signed-off-by: Lorenzo Pieralisi Reviewed-by: Marek Behún Signed-off-by: Sasha Levin --- drivers/pci/controller/pci-aardvark.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 785f7ad4ac9c0..45794ba643d40 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -580,6 +580,7 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, case PCI_EXP_RTCTL: { u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG); *value = (val & PCIE_MSG_PM_PME_MASK) ? 0 : PCI_EXP_RTCTL_PMEIE; + *value |= le16_to_cpu(bridge->pcie_conf.rootctl) & PCI_EXP_RTCTL_CRSSVE; *value |= PCI_EXP_RTCAP_CRSVIS << 16; return PCI_BRIDGE_EMUL_HANDLED; } -- 2.33.0