From patchwork Thu May 20 09:19:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 444317 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 A5B6BC43470 for ; Thu, 20 May 2021 10:21:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AECD6100C for ; Thu, 20 May 2021 10:21:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235680AbhETKXF (ORCPT ); Thu, 20 May 2021 06:23:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:51950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235060AbhETKVK (ORCPT ); Thu, 20 May 2021 06:21:10 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8D0B7619C6; Thu, 20 May 2021 09:47:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504072; bh=2d1CnJ5rJbw1/cXoVBw1vIIysyl6VGjNysbHa3yMiKI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E8FFFIkLuq5BPuRm2Z7PdG2e+t4GQpb/l3LpEtd0yKV/shldzAf9U1Omg3j+5uihr mTzDFjKwt6x5skKbfNVTWwUAl0zWEE5bnJVv1nNPNsayFPVGrcVW3uoIIuD06OMA+1 /bI+PclIQGrjslSygDLIbysVVcci3fhsQ8Y/FK7U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, dann frazier , Marc Zyngier , Fu Wei , Sudeep Holla , Hanjun Guo , Lorenzo Pieralisi , Catalin Marinas Subject: [PATCH 4.14 079/323] ACPI: GTDT: Dont corrupt interrupt mappings on watchdow probe failure Date: Thu, 20 May 2021 11:19:31 +0200 Message-Id: <20210520092122.796479096@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092120.115153432@linuxfoundation.org> References: <20210520092120.115153432@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marc Zyngier commit 1ecd5b129252249b9bc03d7645a7bda512747277 upstream. When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things. Reported-by: dann frazier Fixes: ca9ae5ec4ef0 ("acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver") Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/YH87dtTfwYgavusz@xps13.dannf Cc: Cc: Fu Wei Reviewed-by: Sudeep Holla Tested-by: dann frazier Tested-by: Hanjun Guo Reviewed-by: Hanjun Guo Reviewed-by: Lorenzo Pieralisi Link: https://lore.kernel.org/r/20210421164317.1718831-2-maz@kernel.org Signed-off-by: Catalin Marinas Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/arm64/gtdt.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/drivers/acpi/arm64/gtdt.c +++ b/drivers/acpi/arm64/gtdt.c @@ -332,7 +332,7 @@ static int __init gtdt_import_sbsa_gwdt( int index) { struct platform_device *pdev; - int irq = map_gt_gsi(wd->timer_interrupt, wd->timer_flags); + int irq; /* * According to SBSA specification the size of refresh and control @@ -341,7 +341,7 @@ static int __init gtdt_import_sbsa_gwdt( struct resource res[] = { DEFINE_RES_MEM(wd->control_frame_address, SZ_4K), DEFINE_RES_MEM(wd->refresh_frame_address, SZ_4K), - DEFINE_RES_IRQ(irq), + {}, }; int nr_res = ARRAY_SIZE(res); @@ -351,10 +351,11 @@ static int __init gtdt_import_sbsa_gwdt( if (!(wd->refresh_frame_address && wd->control_frame_address)) { pr_err(FW_BUG "failed to get the Watchdog base address.\n"); - acpi_unregister_gsi(wd->timer_interrupt); return -EINVAL; } + irq = map_gt_gsi(wd->timer_interrupt, wd->timer_flags); + res[2] = (struct resource)DEFINE_RES_IRQ(irq); if (irq <= 0) { pr_warn("failed to map the Watchdog interrupt.\n"); nr_res--; @@ -367,7 +368,8 @@ static int __init gtdt_import_sbsa_gwdt( */ pdev = platform_device_register_simple("sbsa-gwdt", index, res, nr_res); if (IS_ERR(pdev)) { - acpi_unregister_gsi(wd->timer_interrupt); + if (irq > 0) + acpi_unregister_gsi(wd->timer_interrupt); return PTR_ERR(pdev); }