From nobody Sun Feb 8 13:27:30 2026 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 3EF8AC001DF for ; Tue, 25 Jul 2023 08:33:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232804AbjGYIcx (ORCPT ); Tue, 25 Jul 2023 04:32:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232624AbjGYIcr (ORCPT ); Tue, 25 Jul 2023 04:32:47 -0400 X-Greylist: delayed 1836 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 25 Jul 2023 01:32:46 PDT Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80C4F10CC for ; Tue, 25 Jul 2023 01:32:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject: Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=ByrEm1GEP6Pto5Qfd0Av8mnGlhq3HLawewGUcZoBqWg=; b=qnKtBzndkWiwr08ddY1CvlgIan hkLK0Am/nbg/K1pN0RJnbMtuNnIIpB6mIT8S8W8Jub5RDMwcPaGf/6qOQQmCmL7uiKnuzJLd/VyoY BY6mKEeTU6GH5VlEuxAX9S46ZomtnPcQM5/LnS89iKCu+p7l+xSHqy1CihlK1EOwFhleNE3ERq/8P GeDjXbekrVj90JkJdLwXT5JhviD/93BNmAM0ZXkdNnDmRgKC/iQaaKu4oNvbxJw+T7m4PfbHAlRmZ WWkL76pEPPTubJIwyL7sSdsjouuSmvO3Q6xxX5Vughr/pqthDSwiThfSn9Pcd74F/oCU2CQQSh+RI Ctn74S+A==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1qOCl1-008eKy-1S; Tue, 25 Jul 2023 10:46:59 +0300 From: Mikko Perttunen To: Sumit Semwal , Gustavo Padovan Cc: Mikko Perttunen , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] dma_buf/sync_file: Enable signaling for fences when querying status Date: Tue, 25 Jul 2023 10:46:11 +0300 Message-Id: <20230725074611.3309115-1-cyndis@kapsi.fi> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Mikko Perttunen dma_fence_get_status is not guaranteed to return valid information on if the fence has been signaled or not if SW signaling has not been enabled for the fence. To ensure valid information is reported, enable SW signaling for fences before getting their status. Signed-off-by: Mikko Perttunen --- drivers/dma-buf/sync_file.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c index af57799c86ce..57f194b8477f 100644 --- a/drivers/dma-buf/sync_file.c +++ b/drivers/dma-buf/sync_file.c @@ -267,6 +267,7 @@ static int sync_fill_fence_info(struct dma_fence *fence, strscpy(info->driver_name, fence->ops->get_driver_name(fence), sizeof(info->driver_name)); =20 + dma_fence_enable_sw_signaling(fence); info->status =3D dma_fence_get_status(fence); while (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) && !test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags)) @@ -307,6 +308,7 @@ static long sync_file_ioctl_fence_info(struct sync_file= *sync_file, * info->num_fences. */ if (!info.num_fences) { + dma_fence_enable_sw_signaling(sync_file->fence); info.status =3D dma_fence_get_status(sync_file->fence); goto no_fences; } else { --=20 2.40.1