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 CAAF0C4708D for ; Mon, 5 Dec 2022 19:36:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234370AbiLETgg (ORCPT ); Mon, 5 Dec 2022 14:36:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234285AbiLETgQ (ORCPT ); Mon, 5 Dec 2022 14:36:16 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46A4017437 for ; Mon, 5 Dec 2022 11:32:58 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2EDE0B81201 for ; Mon, 5 Dec 2022 19:32:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77D05C433D6; Mon, 5 Dec 2022 19:32:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670268775; bh=wS2rbojpk/er2WTDgbuek2AGdd7sLrfue0DR5un57bI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BL6yD3YRPlAcEgEgmVX1IDaPqkD7cDFdfdvsYhQE4msUwLyfxmj4xsrDinVIo8KRT RI0zmA2X9FvQRShbiKYXFGEk84pvg+yvA3FxBsuYlgkIAxnVbre+Al022RQMovyXrc 6cXUTIQVCXds2KfDnBLEL6qI6fktYnrm/XdmXbyA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Janusz Krzysztofik , Andrzej Hajda , Tvrtko Ursulin Subject: [PATCH 5.10 67/92] drm/i915: Never return 0 if not all requests retired Date: Mon, 5 Dec 2022 20:10:20 +0100 Message-Id: <20221205190805.724492186@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221205190803.464934752@linuxfoundation.org> References: <20221205190803.464934752@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Janusz Krzysztofik commit 12b8b046e4c9de40fa59b6f067d6826f4e688f68 upstream. Users of intel_gt_retire_requests_timeout() expect 0 return value on success. However, we have no protection from passing back 0 potentially returned by a call to dma_fence_wait_timeout() when it succedes right after its timeout has expired. Replace 0 with -ETIME before potentially using the timeout value as return code, so -ETIME is returned if there are still some requests not retired after timeout, 0 otherwise. v3: Use conditional expression, more compact but also better reflecting intention standing behind the change. v2: Move the added lines down so flush_submission() is not affected. Fixes: f33a8a51602c ("drm/i915: Merge wait_for_timelines with retire_request") Signed-off-by: Janusz Krzysztofik Reviewed-by: Andrzej Hajda Cc: stable@vger.kernel.org # v5.5+ Signed-off-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20221121145655.75141-3-janusz.krzysztofik@linux.intel.com (cherry picked from commit f301a29f143760ce8d3d6b6a8436d45d3448cde6) Signed-off-by: Tvrtko Ursulin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/gt/intel_gt_requests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/gt/intel_gt_requests.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_requests.c @@ -200,7 +200,7 @@ out_active: spin_lock(&timelines->lock); if (flush_submission(gt, timeout)) /* Wait, there's more! */ active_count++; - return active_count ? timeout : 0; + return active_count ? timeout ?: -ETIME : 0; } int intel_gt_wait_for_idle(struct intel_gt *gt, long timeout)