From patchwork Tue Oct 25 12:25:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 9394443 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 149336077F for ; Tue, 25 Oct 2016 12:25:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0617929587 for ; Tue, 25 Oct 2016 12:25:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EC46329586; Tue, 25 Oct 2016 12:25:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A5DA329586 for ; Tue, 25 Oct 2016 12:25:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0D7976E6EF; Tue, 25 Oct 2016 12:25:20 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from pegasos-out.vodafone.de (pegasos-out.vodafone.de [80.84.1.38]) by gabe.freedesktop.org (Postfix) with ESMTP id DC6AD6E6EC for ; Tue, 25 Oct 2016 12:25:18 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by pegasos-out.vodafone.de (Rohrpostix2 Daemon) with ESMTP id 524CA4C52FC; Tue, 25 Oct 2016 14:25:18 +0200 (CEST) X-Virus-Scanned: amavisd-new at vodafone.de Authentication-Results: rohrpostix2.prod.vfnet.de (amavisd-new); dkim=pass header.i=@vodafone.de Received: from pegasos-out.vodafone.de ([127.0.0.1]) by localhost (rohrpostix2.prod.vfnet.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lrDzjBPGnGcP; Tue, 25 Oct 2016 14:25:14 +0200 (CEST) Received: from smtp-04.vodafone.de (smtp-04.vodafone.de [10.215.254.39]) by pegasos-out.vodafone.de (Rohrpostix2 Daemon) with ESMTP id 170494C52FB; Tue, 25 Oct 2016 14:25:14 +0200 (CEST) X-DKIM: OpenDKIM Filter v2.6.8 pegasos-out.vodafone.de 170494C52FB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vodafone.de; s=mail; t=1477398314; bh=5DyDj5pOi+VsEW4QvTk2xmW60UkwOL8EDkMTmVSMzxw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=EYsgENmNcA7UuUBafK+M+jjwz0ejI/+vycRjCGu1g6lR9i/LcITejgB1Chlsdb3iw kVl215JHRK7+qQeINe9sxu3QqXJkYQSgPxpNQ1/pajk0h89jNkVy3NiNMo37GmG1nb uV7F86RmCfdrAcCKsfjl1+PSZYCg/nMEYnUbEl78= X-Virus-Scanned: amavisd-new at vodafone.de Received: from smtp-04.vodafone.de ([127.0.0.1]) by localhost (xsmail-dmz8.prod.vfnet.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1FA+mlWmHz1a; Tue, 25 Oct 2016 14:25:11 +0200 (CEST) From: =?UTF-8?q?Christian=20K=C3=B6nig?= To: sumit.semwal@linaro.org Subject: [PATCH 1/4] dma-buf/fence: make timeout handling in fence_default_wait consistent Date: Tue, 25 Oct 2016 14:25:08 +0200 Message-Id: <1477398311-5218-2-git-send-email-deathsimple@vodafone.de> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1477398311-5218-1-git-send-email-deathsimple@vodafone.de> References: <1477398311-5218-1-git-send-email-deathsimple@vodafone.de> MIME-Version: 1.0 Cc: dri-devel@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Christian König Kernel functions taking a timeout usually return 1 on success even when they get a zero timeout. Signen-off-by: Christian König Reviewed-by: Chunming Zhou Reviewed-by: Alex Deucher --- drivers/dma-buf/fence.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c index 4d51f9e..fb915ab 100644 --- a/drivers/dma-buf/fence.c +++ b/drivers/dma-buf/fence.c @@ -335,18 +335,20 @@ fence_default_wait_cb(struct fence *fence, struct fence_cb *cb) * @timeout: [in] timeout value in jiffies, or MAX_SCHEDULE_TIMEOUT * * Returns -ERESTARTSYS if interrupted, 0 if the wait timed out, or the - * remaining timeout in jiffies on success. + * remaining timeout in jiffies on success. If timeout is zero the value one is + * returned if the fence is already signaled for consistency with other + * functions taking a jiffies timeout. */ signed long fence_default_wait(struct fence *fence, bool intr, signed long timeout) { struct default_wait_cb cb; unsigned long flags; - signed long ret = timeout; + signed long ret = timeout ? timeout : 1; bool was_set; if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags)) - return timeout; + return ret; spin_lock_irqsave(fence->lock, flags);