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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4AF82CFB43C for ; Mon, 7 Oct 2024 17:50:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BA30B10E3E7; Mon, 7 Oct 2024 17:50:58 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="cXND0hxT"; dkim-atps=neutral Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5D7F610E3E7 for ; Mon, 7 Oct 2024 17:50:57 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 144F0A41DAF; Mon, 7 Oct 2024 17:50:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E802CC4CEC6; Mon, 7 Oct 2024 17:50:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728323456; bh=pJgVgr+fWamtnfNxgjG0XPOXojlYnHGSWRX4Nv1TMXw=; h=Subject:To:Cc:From:Date:From; b=cXND0hxTVZb5lSI+7NMdiZGynEjfF/N+xlFixEXcTbpCjKv+weo8+3kxTXmVP9+Xt D6OYoX5wrH9B3QOxdUp8dfl4LhRWALWpCJ/VbpGY5qdr3qmXWkCz2V3AceqI4yPhd8 7XoqHVdRU2953OJX176hwv3ze5A1O228omuqV7U0= Subject: Patch "drm/sched: Add locking to drm_sched_entity_modify_sched" has been added to the 6.6-stable tree To: airlied@gmail.com, alexander.deucher@amd.com, christian.koenig@amd.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org, ltuikov89@gmail.com, matthew.brost@intel.com, pstanner@redhat.com, tvrtko.ursulin@igalia.com Cc: From: Date: Mon, 07 Oct 2024 19:50:39 +0200 Message-ID: <2024100739-affluent-credit-5b96@gregkh> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-stable: commit X-Patchwork-Hint: ignore X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This is a note to let you know that I've just added the patch titled drm/sched: Add locking to drm_sched_entity_modify_sched to the 6.6-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-sched-add-locking-to-drm_sched_entity_modify_sched.patch and it can be found in the queue-6.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >From 4286cc2c953983d44d248c9de1c81d3a9643345c Mon Sep 17 00:00:00 2001 From: Tvrtko Ursulin Date: Fri, 13 Sep 2024 17:05:52 +0100 Subject: drm/sched: Add locking to drm_sched_entity_modify_sched MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Tvrtko Ursulin commit 4286cc2c953983d44d248c9de1c81d3a9643345c upstream. Without the locking amdgpu currently can race between amdgpu_ctx_set_entity_priority() (via drm_sched_entity_modify_sched()) and drm_sched_job_arm(), leading to the latter accesing potentially inconsitent entity->sched_list and entity->num_sched_list pair. v2: * Improve commit message. (Philipp) Signed-off-by: Tvrtko Ursulin Fixes: b37aced31eb0 ("drm/scheduler: implement a function to modify sched list") Cc: Christian König Cc: Alex Deucher Cc: Luben Tuikov Cc: Matthew Brost Cc: David Airlie Cc: Daniel Vetter Cc: dri-devel@lists.freedesktop.org Cc: Philipp Stanner Cc: # v5.7+ Reviewed-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20240913160559.49054-2-tursulin@igalia.com Signed-off-by: Christian König Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/scheduler/sched_entity.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -111,8 +111,10 @@ void drm_sched_entity_modify_sched(struc { WARN_ON(!num_sched_list || !sched_list); + spin_lock(&entity->rq_lock); entity->sched_list = sched_list; entity->num_sched_list = num_sched_list; + spin_unlock(&entity->rq_lock); } EXPORT_SYMBOL(drm_sched_entity_modify_sched); Patches currently in stable-queue which might be from tvrtko.ursulin@igalia.com are queue-6.6/drm-sched-add-locking-to-drm_sched_entity_modify_sched.patch