From patchwork Thu Nov 9 10:10:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 13450870 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CFC2E15EB6 for ; Thu, 9 Nov 2023 10:10:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="J5wRoCmS" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 639072D65 for ; Thu, 9 Nov 2023 02:10:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699524619; x=1731060619; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=NA/sJdCrLqbFypsfbxjkXbC8FskGu2awhv9fbmjjLzo=; b=J5wRoCmSadeiAeaYWU9u4K53BkCBypevKeZnVYRsVS6HRbpwucaDCAHi xe6YjKT9nLBQMQIDeVzoPjNBCP/oLuVgzi6diVUy+7lKJcmkIFI+1YlRY w0PpJ728x7RPCDO13HJXuvZpo2Jt1T4je5UB36iSeBBq0HMd/U0cYYqEI lSYaHl4Q7OcQ+1jqcCw/QSfILOZv4O8aSKG1J4pf7vmYtUQJOnd6npKOO o+Ji0U+tVJ4zIqDnDtiqayQsx88Azyz5firHikZ5EAwXUjUCjfVWSMyTg TOqvQYp2rLdqJyeLoROqcgyB4+U/h4XdP3rD8KCt0JOTKQSf1tK2gRXsv A==; X-IronPort-AV: E=McAfee;i="6600,9927,10888"; a="369289673" X-IronPort-AV: E=Sophos;i="6.03,289,1694761200"; d="scan'208";a="369289673" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2023 02:10:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10888"; a="756841700" X-IronPort-AV: E=Sophos;i="6.03,289,1694761200"; d="scan'208";a="756841700" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2023 02:10:17 -0800 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 2B62B11FC11; Thu, 9 Nov 2023 12:10:14 +0200 (EET) From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: andriy.shevchenko@linux.intel.com, Daniel Scally , Heikki Krogerus , "Rafael J. Wysocki" , Greg Kroah-Hartman Subject: [RESEND PATCH v4 1/3] acpi: property: Let args be NULL in __acpi_node_get_property_reference Date: Thu, 9 Nov 2023 12:10:08 +0200 Message-Id: <20231109101010.1329587-2-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231109101010.1329587-1-sakari.ailus@linux.intel.com> References: <20231109101010.1329587-1-sakari.ailus@linux.intel.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 fwnode_get_property_reference_args() may not be called with args argument NULL on ACPI, OF already supports this. Add the missing NULL checks and document this. The purpose is to be able to count the references. Fixes: 977d5ad39f3e ("ACPI: Convert ACPI reference args to generic fwnode reference args") Signed-off-by: Sakari Ailus Reviewed-by: Andy Shevchenko Reviewed-by: Heikki Krogerus --- drivers/acpi/property.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 413e4fcadcaf..93608714b652 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -851,6 +851,7 @@ static int acpi_get_ref_args(struct fwnode_reference_args *args, * @index: Index of the reference to return * @num_args: Maximum number of arguments after each reference * @args: Location to store the returned reference with optional arguments + * (may be NULL) * * Find property with @name, verifify that it is a package containing at least * one object reference and if so, store the ACPI device object pointer to the @@ -907,6 +908,9 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, if (!device) return -EINVAL; + if (!args) + return 0; + args->fwnode = acpi_fwnode_handle(device); args->nargs = 0; return 0;