From patchwork Wed Feb 12 14:59:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 215155 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 0040AC3B188 for ; Wed, 12 Feb 2020 14:59:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CBA5220873 for ; Wed, 12 Feb 2020 14:59:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728401AbgBLO7q (ORCPT ); Wed, 12 Feb 2020 09:59:46 -0500 Received: from mga18.intel.com ([134.134.136.126]:52883 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728245AbgBLO7q (ORCPT ); Wed, 12 Feb 2020 09:59:46 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2020 06:59:45 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,433,1574150400"; d="scan'208";a="256838084" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga004.fm.intel.com with ESMTP; 12 Feb 2020 06:59:42 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id B164C193; Wed, 12 Feb 2020 16:59:41 +0200 (EET) From: Mika Westerberg To: Jean Delvare , "Rafael J. Wysocki" Cc: Len Brown , linux-acpi@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck , linux-watchdog@vger.kernel.org, Robert Moore , Erik Kaneda , Tom Abraham , Mika Westerberg Subject: [PATCH v2 1/3] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro Date: Wed, 12 Feb 2020 17:59:39 +0300 Message-Id: <20200212145941.32914-2-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200212145941.32914-1-mika.westerberg@linux.intel.com> References: <20200212145941.32914-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Sometimes it is useful to find the access_width field value in bytes and not in bits so add a helper that can be used for this purpose. Suggested-by: Jean Delvare Signed-off-by: Mika Westerberg Reviewed-by: Jean Delvare --- include/acpi/actypes.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index a2583c2bc054..4defed58ea33 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -532,11 +532,12 @@ typedef u64 acpi_integer; strnlen (a, ACPI_NAMESEG_SIZE) == ACPI_NAMESEG_SIZE) /* - * Algorithm to obtain access bit width. + * Algorithm to obtain access bit or byte width. * Can be used with access_width of struct acpi_generic_address and access_size of * struct acpi_resource_generic_register. */ #define ACPI_ACCESS_BIT_WIDTH(size) (1 << ((size) + 2)) +#define ACPI_ACCESS_BYTE_WIDTH(size) (1 << ((size) - 1)) /******************************************************************************* * From patchwork Wed Feb 12 14:59:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 215154 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 87226C4741C for ; Wed, 12 Feb 2020 14:59:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68CEF2082F for ; Wed, 12 Feb 2020 14:59:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728430AbgBLO7r (ORCPT ); Wed, 12 Feb 2020 09:59:47 -0500 Received: from mga06.intel.com ([134.134.136.31]:20815 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728245AbgBLO7q (ORCPT ); Wed, 12 Feb 2020 09:59:46 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2020 06:59:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,433,1574150400"; d="scan'208";a="233810576" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga003.jf.intel.com with ESMTP; 12 Feb 2020 06:59:42 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id C6CF928E; Wed, 12 Feb 2020 16:59:41 +0200 (EET) From: Mika Westerberg To: Jean Delvare , "Rafael J. Wysocki" Cc: Len Brown , linux-acpi@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck , linux-watchdog@vger.kernel.org, Robert Moore , Erik Kaneda , Tom Abraham , Mika Westerberg Subject: [PATCH v2 3/3] ACPI / watchdog: Set default timeout in probe Date: Wed, 12 Feb 2020 17:59:41 +0300 Message-Id: <20200212145941.32914-4-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200212145941.32914-1-mika.westerberg@linux.intel.com> References: <20200212145941.32914-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org If the BIOS default timeout for the watchdog is too small userspace may not have enough time to configure new timeout after opening the device before the system is already reset. For this reason program default timeout of 30 seconds in the driver probe and allow userspace to change this from command line or through module parameter (wdat_wdt.timeout). Reported-by: Jean Delvare Signed-off-by: Mika Westerberg --- drivers/watchdog/wdat_wdt.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index e1b1fcfc02af..3065dd670a18 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -54,6 +54,13 @@ module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +#define WDAT_DEFAULT_TIMEOUT 30 + +static int timeout = WDAT_DEFAULT_TIMEOUT; +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default=" + __MODULE_STRING(WDAT_DEFAULT_TIMEOUT) ")"); + static int wdat_wdt_read(struct wdat_wdt *wdat, const struct wdat_instruction *instr, u32 *value) { @@ -438,6 +445,22 @@ static int wdat_wdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, wdat); + /* + * Set initial timeout so that userspace has time to configure the + * watchdog properly after it has opened the device. In some cases + * the BIOS default is too short and causes immediate reboot. + */ + if (timeout * 1000 < wdat->wdd.min_hw_heartbeat_ms || + timeout * 1000 > wdat->wdd.max_hw_heartbeat_ms) { + dev_warn(dev, "Invalid timeout %d given, using %d\n", + timeout, WDAT_DEFAULT_TIMEOUT); + timeout = WDAT_DEFAULT_TIMEOUT; + } + + ret = wdat_wdt_set_timeout(&wdat->wdd, timeout); + if (ret) + return ret; + watchdog_set_nowayout(&wdat->wdd, nowayout); return devm_watchdog_register_device(dev, &wdat->wdd); }