From patchwork Wed Jan 4 18:30:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Gondois X-Patchwork-Id: 639342 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4603EC4332F for ; Wed, 4 Jan 2023 18:31:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239807AbjADSbl (ORCPT ); Wed, 4 Jan 2023 13:31:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239845AbjADSbh (ORCPT ); Wed, 4 Jan 2023 13:31:37 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A34071573E; Wed, 4 Jan 2023 10:31:29 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 215671682; Wed, 4 Jan 2023 10:32:11 -0800 (PST) Received: from pierre123.arm.com (unknown [10.57.44.105]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B7A963F663; Wed, 4 Jan 2023 10:31:25 -0800 (PST) From: Pierre Gondois To: linux-kernel@vger.kernel.org Cc: Pierre Gondois , Sudeep Holla , Palmer Dabbelt , Catalin Marinas , Will Deacon , Paul Walmsley , Palmer Dabbelt , Albert Ou , "Rafael J. Wysocki" , Len Brown , Greg Kroah-Hartman , Jeremy Linton , Conor Dooley , Gavin Shan , linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, linux-acpi@vger.kernel.org Subject: [PATCH v4 2/6] cacheinfo: Return error code in init_of_cache_level() Date: Wed, 4 Jan 2023 19:30:25 +0100 Message-Id: <20230104183033.755668-3-pierre.gondois@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230104183033.755668-1-pierre.gondois@arm.com> References: <20230104183033.755668-1-pierre.gondois@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Make init_of_cache_level() return an error code when the cache information parsing fails to help detecting missing information. init_of_cache_level() is only called for riscv. Returning an error code instead of 0 will prevent detect_cache_attributes() to allocate memory if an incomplete DT is parsed. Signed-off-by: Pierre Gondois Reviewed-by: Sudeep Holla Acked-by: Palmer Dabbelt --- drivers/base/cacheinfo.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index 5ae58e32a77f..3e965ef6ee42 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -246,11 +246,11 @@ int init_of_cache_level(unsigned int cpu) of_node_put(prev); prev = np; if (!of_device_is_compatible(np, "cache")) - break; + goto err_out; if (of_property_read_u32(np, "cache-level", &level)) - break; + goto err_out; if (level <= levels) - break; + goto err_out; if (of_property_read_bool(np, "cache-size")) ++leaves; if (of_property_read_bool(np, "i-cache-size")) @@ -265,6 +265,10 @@ int init_of_cache_level(unsigned int cpu) this_cpu_ci->num_leaves = leaves; return 0; + +err_out: + of_node_put(np); + return -EINVAL; } #else