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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A358C3DA78 for ; Sun, 15 Jan 2023 20:52:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230137AbjAOUwV convert rfc822-to-8bit (ORCPT ); Sun, 15 Jan 2023 15:52:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231356AbjAOUwS (ORCPT ); Sun, 15 Jan 2023 15:52:18 -0500 Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 499E1CC09 for ; Sun, 15 Jan 2023 12:52:17 -0800 (PST) Received: from omf10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 55F981A0A53; Sun, 15 Jan 2023 20:52:15 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: joe@perches.com) by omf10.hostedemail.com (Postfix) with ESMTPA id A6A8832; Sun, 15 Jan 2023 20:52:11 +0000 (UTC) Message-ID: <33ecbe8971bb9c90d72c67d43ca740abac160908.camel@perches.com> Subject: Re: [PATCH] drm/amd/display: Simplify same effect if/else blocks From: Joe Perches To: Deepak R Varma , Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , Christian =?ISO-8859-1?Q?K=F6nig?= , "Pan, Xinhui" , David Airlie , Daniel Vetter , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Saurabh Singh Sengar , Praveen Kumar Date: Sun, 15 Jan 2023 12:52:10 -0800 In-Reply-To: References: Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8BIT User-Agent: Evolution 3.44.4 (3.44.4-2.fc36) MIME-Version: 1.0 X-Rspamd-Queue-Id: A6A8832 X-Rspamd-Server: rspamout03 X-Stat-Signature: nmp5jzgs6mbr4ybrsoi3t7kdy77pzftq X-Session-Marker: 6A6F6540706572636865732E636F6D X-Session-ID: U2FsdGVkX1+vcIh7h853zIRDiyU/iVp2UCz25hch+jM= X-HE-Tag: 1673815931-499090 X-HE-Meta: U2FsdGVkX1/EeyVIfaSREYkP20+/ZisoRlOpWZ33AFH9Y7nb5ddC0nDiZ8wdYjIk0gbCITI5svD3Yr3xHWrKTg== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2023-01-15 at 15:30 +0530, Deepak R Varma wrote: > The if / else block code has same effect irrespective of the logical > evaluation. Hence, simply the implementation by removing the unnecessary > conditional evaluation. While at it, also fix the long line checkpatch > complaint. Issue identified using cond_no_effect.cocci Coccinelle > semantic patch script. > > Signed-off-by: Deepak R Varma > --- > Please note: The proposed change is compile tested only. If there are any > inbuilt test cases that I should run for further verification, I will appreciate > guidance about it. Thank you. Preface: I do not know the code. Perhaps Rodrigo Siqueira made a copy/paste error submitting the code for commit 9114b55fabae ("drm/amd/display: Fix SubVP control flow in the MPO context") as the code prior to this change is identical. Perhaps one of the false uses should be true or dependent on the interdependent_update_lock state. > diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c [] > @@ -3470,14 +3470,9 @@ static void commit_planes_for_stream(struct dc *dc, > /* Since phantom pipe programming is moved to post_unlock_program_front_end, > * move the SubVP lock to after the phantom pipes have been setup > */ > - if (should_lock_all_pipes && dc->hwss.interdependent_update_lock) { > - if (dc->hwss.subvp_pipe_control_lock) > - dc->hwss.subvp_pipe_control_lock(dc, context, false, should_lock_all_pipes, NULL, subvp_prev_use); > - } else { > - if (dc->hwss.subvp_pipe_control_lock) > - dc->hwss.subvp_pipe_control_lock(dc, context, false, should_lock_all_pipes, NULL, subvp_prev_use); > - } > - Perhaps something like: if (dc->hwss.subvp_pipe_control_lock) dc->hwss.subvp_pipe_control_lock(dc, context, should_lock_all_pipes && dc->hwss.interdependent_update_lock, should_lock_all_pipes, NULL, subvp_prev_use); > + if (dc->hwss.subvp_pipe_control_lock) > + dc->hwss.subvp_pipe_control_lock(dc, context, false, should_lock_all_pipes, > + NULL, subvp_prev_use); > return; > } >