From patchwork Mon Nov 21 14:56:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janusz Krzysztofik X-Patchwork-Id: 13051238 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 13262C4332F for ; Mon, 21 Nov 2022 14:58:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 26F0410E2E9; Mon, 21 Nov 2022 14:58:14 +0000 (UTC) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id BD41210E2F1; Mon, 21 Nov 2022 14:57:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1669042676; x=1700578676; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+sEp8/ZtTB5D2wuDjJYNgKtN8CNBIgF6cAGgVXjPYVY=; b=EOPT2gIsse7VgjzCv8UQ7KYqynekg+BvOsCrj+QMT0VcrG2vf9OTPLfy A32oqjZUEVattjr3tvv3kaPLzfPyhjkIpuUsVRaL1CDpuLy3kR+wDSeFo m1Vh/6MbQbkrco3DLJQFFVXA3hoFKZqMqg1yQRuxHe1/yUd3L31GYVuya UKpunkb75e7d6zhHAzk2IrS+uSsbp/k+nhu5cdoAmk6iukhfJzshzNz3G 1r9X29GYKVJEurcSEbhFj5vW7rdAFpPDJk5f+QrgVwOyk2zo4wy4MWDZW osukCxBQ9mMtumbfQpI1EcNl9AoxMBu/Hxes3ZFFj15kDEHNfOyOXu5ay w==; X-IronPort-AV: E=McAfee;i="6500,9779,10538"; a="315395325" X-IronPort-AV: E=Sophos;i="5.96,181,1665471600"; d="scan'208";a="315395325" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Nov 2022 06:57:56 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10538"; a="765985132" X-IronPort-AV: E=Sophos;i="5.96,181,1665471600"; d="scan'208";a="765985132" Received: from jkrzyszt-mobl1.ger.corp.intel.com (HELO jkrzyszt-mobl1.intranet) ([10.213.16.21]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Nov 2022 06:57:48 -0800 From: Janusz Krzysztofik To: Tvrtko Ursulin , Joonas Lahtinen Date: Mon, 21 Nov 2022 15:56:55 +0100 Message-Id: <20221121145655.75141-3-janusz.krzysztofik@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221121145655.75141-1-janusz.krzysztofik@linux.intel.com> References: <20221121145655.75141-1-janusz.krzysztofik@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 2/2] drm/i915: Never return 0 if not all requests retired 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: , Cc: Daniel Vetter , intel-gfx@lists.freedesktop.org, Chris Wilson , dri-devel@lists.freedesktop.org, Andrzej Hajda , Nirmoy Das Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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+ --- drivers/gpu/drm/i915/gt/intel_gt_requests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_requests.c b/drivers/gpu/drm/i915/gt/intel_gt_requests.c index edb881d756309..1dfd01668c79c 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_requests.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_requests.c @@ -199,7 +199,7 @@ out_active: spin_lock(&timelines->lock); if (remaining_timeout) *remaining_timeout = timeout; - return active_count ? timeout : 0; + return active_count ? timeout ?: -ETIME : 0; } static void retire_work_handler(struct work_struct *work)