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=-16.8 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 0D949C636C8 for ; Tue, 20 Jul 2021 20:40:53 +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 C847360FEA for ; Tue, 20 Jul 2021 20:40:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C847360FEA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A3BA56E55E; Tue, 20 Jul 2021 20:40:25 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id F021B6E4DE; Tue, 20 Jul 2021 20:40:16 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10051"; a="209421880" X-IronPort-AV: E=Sophos;i="5.84,256,1620716400"; d="scan'208";a="209421880" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jul 2021 13:40:16 -0700 X-IronPort-AV: E=Sophos;i="5.84,256,1620716400"; d="scan'208";a="414906064" Received: from dhiatt-server.jf.intel.com ([10.54.81.3]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jul 2021 13:40:15 -0700 From: Matthew Brost To: , Date: Tue, 20 Jul 2021 13:57:27 -0700 Message-Id: <20210720205802.39610-8-matthew.brost@intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210720205802.39610-1-matthew.brost@intel.com> References: <20210720205802.39610-1-matthew.brost@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [RFC PATCH 07/42] drm/i915/guc: Check return of __xa_store when registering a 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Check return of __xa_store when registering a context as this can fail in a rare case if not memory can not be allocated. If this occurs fall back on the tasklet flow control and try again in the future. Signed-off-by: Matthew Brost --- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 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 fce5c1d8cfda..2873018eb36e 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -502,18 +502,24 @@ static inline bool lrc_desc_registered(struct intel_guc *guc, u32 id) return __get_context(guc, id); } -static inline void set_lrc_desc_registered(struct intel_guc *guc, u32 id, +static inline int set_lrc_desc_registered(struct intel_guc *guc, u32 id, struct intel_context *ce) { unsigned long flags; + void *ret; /* * xarray API doesn't have xa_save_irqsave wrapper, so calling the * lower level functions directly. */ xa_lock_irqsave(&guc->context_lookup, flags); - __xa_store(&guc->context_lookup, id, ce, GFP_ATOMIC); + ret = __xa_store(&guc->context_lookup, id, ce, GFP_ATOMIC); xa_unlock_irqrestore(&guc->context_lookup, flags); + + if (unlikely(xa_is_err(ret))) + return -EBUSY; /* Try again in future */ + + return 0; } static int guc_submission_send_busy_loop(struct intel_guc* guc, @@ -1840,7 +1846,9 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop) rcu_read_unlock(); reset_lrc_desc(guc, desc_idx); - set_lrc_desc_registered(guc, desc_idx, ce); + ret = set_lrc_desc_registered(guc, desc_idx, ce); + if (unlikely(ret)) + return ret; desc = __get_lrc_desc(guc, desc_idx); desc->engine_class = engine_class_to_guc_class(engine->class); -- 2.28.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx