From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 BC233C43613 for ; Sat, 22 Jun 2019 13:06:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9281F2070B for ; Sat, 22 Jun 2019 13:06:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726331AbfFVNGL (ORCPT ); Sat, 22 Jun 2019 09:06:11 -0400 Received: from mail3-relais-sop.national.inria.fr ([192.134.164.104]:6796 "EHLO mail3-relais-sop.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726287AbfFVNGL (ORCPT ); Sat, 22 Jun 2019 09:06:11 -0400 X-IronPort-AV: E=Sophos;i="5.63,404,1557180000"; d="scan'208";a="311071975" Received: from abo-12-105-68.mrs.modulonet.fr (HELO hadrien) ([85.68.105.12]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Jun 2019 15:06:08 +0200 Date: Sat, 22 Jun 2019 15:06:07 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Mao Wenan cc: airlied@linux.ie, daniel@ffwll.ch, alexander.deucher@amd.com, christian.koenig@amd.com, David1.Zhou@amd.com, dan.carpenter@oracle.com, kernel-janitors@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH -next v2] drm/amdgpu: return 'ret' in amdgpu_pmu_init In-Reply-To: <20190622130527.182022-1-maowenan@huawei.com> Message-ID: References: <20190622104318.GT28859@kadam> <20190622130527.182022-1-maowenan@huawei.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="8323329-205373768-1561208768=:3253" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323329-205373768-1561208768=:3253 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT On Sat, 22 Jun 2019, Mao Wenan wrote: > There is one warning: > drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c: In function ‘amdgpu_pmu_init’: > drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c:249:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable] > int ret = 0; > ^ > amdgpu_pmu_init() is called by amdgpu_device_init() in drivers/gpu/drm/amd/amdgpu/amdgpu_device.c, > which will use the return value. So it returns 'ret' for caller. > amdgpu_device_init() > r = amdgpu_pmu_init(adev); > > Fixes: 9c7c85f7ea1f ("drm/amdgpu: add pmu counters") > > Signed-off-by: Mao Wenan > --- > v1->v2: change the subject for this patch; change the indenting when it calls init_pmu_by_type; use the value 'ret' in > amdgpu_pmu_init(). > drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c > index 0e6dba9..145e720 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c > @@ -252,8 +252,8 @@ int amdgpu_pmu_init(struct amdgpu_device *adev) > case CHIP_VEGA20: > /* init df */ > ret = init_pmu_by_type(adev, df_v3_6_attr_groups, > - "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF, > - DF_V3_6_MAX_COUNTERS); > + "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF, > + DF_V3_6_MAX_COUNTERS); > > /* other pmu types go here*/ I don't know what is the impact of the other pmu types that are planned for the future. Perhaps it would be better to abort the function immediately in the case of a failure. julia > break; > @@ -261,7 +261,7 @@ int amdgpu_pmu_init(struct amdgpu_device *adev) > return 0; > } > > - return 0; > + return ret; > } > > > -- > 2.7.4 > > --8323329-205373768-1561208768=:3253--