From patchwork Thu Sep 9 16:47:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Brost X-Patchwork-Id: 12483479 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 DBEC1C433FE for ; Thu, 9 Sep 2021 16:53:26 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A55F96023D for ; Thu, 9 Sep 2021 16:53:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A55F96023D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 12E996E8C7; Thu, 9 Sep 2021 16:52:54 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id D9BFB6E8C6; Thu, 9 Sep 2021 16:52:51 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10102"; a="218988846" X-IronPort-AV: E=Sophos;i="5.85,280,1624345200"; d="scan'208";a="218988846" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Sep 2021 09:52:51 -0700 X-IronPort-AV: E=Sophos;i="5.85,280,1624345200"; d="scan'208";a="649003798" Received: from jons-linux-dev-box.fm.intel.com ([10.1.27.20]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Sep 2021 09:52:50 -0700 From: Matthew Brost To: , Cc: , Date: Thu, 9 Sep 2021 09:47:25 -0700 Message-Id: <20210909164744.31249-5-matthew.brost@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210909164744.31249-1-matthew.brost@intel.com> References: <20210909164744.31249-1-matthew.brost@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 04/23] drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Don't drop ce->guc_active.lock when unwinding a context after reset. At one point we had to drop this because of a lock inversion but that is no longer the case. It is much safer to hold the lock so let's do that. Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface") Reviewed-by: Daniele Ceraolo Spurio Signed-off-by: Matthew Brost Cc: --- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 0c1e6b465fba..31bbfe5479ae 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -813,8 +813,6 @@ __unwind_incomplete_requests(struct intel_context *ce) continue; list_del_init(&rq->sched.link); - spin_unlock(&ce->guc_active.lock); - __i915_request_unsubmit(rq); /* Push the request back into the queue for later resubmission. */ @@ -827,8 +825,6 @@ __unwind_incomplete_requests(struct intel_context *ce) list_add(&rq->sched.link, pl); set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); - - spin_lock(&ce->guc_active.lock); } spin_unlock(&ce->guc_active.lock); spin_unlock_irqrestore(&sched_engine->lock, flags);