From patchwork Fri Jan 20 16:54:32 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tobias Jakobi X-Patchwork-Id: 9528995 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 B56C36045F for ; Fri, 20 Jan 2017 16:54:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BB22428665 for ; Fri, 20 Jan 2017 16:54:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AF2AF28676; Fri, 20 Jan 2017 16:54:44 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED 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 5722028665 for ; Fri, 20 Jan 2017 16:54:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3D7D36E1C5; Fri, 20 Jan 2017 16:54:43 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.math.uni-bielefeld.de (smtp.math.uni-bielefeld.de [129.70.45.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id B28CE6E1C5 for ; Fri, 20 Jan 2017 16:54:42 +0000 (UTC) Received: from chidori.dhcp.uni-bielefeld.de (dhcp-10-68-171-17.dhcp.uni-bielefeld.de [10.68.171.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (Client did not present a certificate) by smtp.math.uni-bielefeld.de (Postfix) with ESMTPSA id 16A135F64D; Fri, 20 Jan 2017 17:54:41 +0100 (CET) From: Tobias Jakobi To: linux-samsung-soc@vger.kernel.org Subject: [PATCH] drm/exynos: fix a timeout loop Date: Fri, 20 Jan 2017 17:54:32 +0100 Message-Id: <1484931272-20113-1-git-send-email-tjakobi@math.uni-bielefeld.de> X-Mailer: git-send-email 2.7.3 Cc: Dan Carpenter , 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: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Dan Carpenter We were trying to print an error message if we timed out here, but the loop actually ends with "tries" set to UINT_MAX and not zero. Fix this by changing from tries-- to --tries. A for loop would actually be the most natural way to do this. My fix means we only loop 99 times instead of 100 but that's probably ok. Fixes: a696394c5224 ('drm/exynos: mixer: simplify loop in vp_win_reset()') Signed-off-by: Dan Carpenter Reviewed-by: Tobias Jakobi --- drivers/gpu/drm/exynos/exynos_mixer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index edb20a3..fcc7e4f 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -701,7 +701,7 @@ static void vp_win_reset(struct mixer_context *ctx) unsigned int tries = 100; vp_reg_write(res, VP_SRESET, VP_SRESET_PROCESSING); - while (tries--) { + while (--tries) { /* waiting until VP_SRESET_PROCESSING is 0 */ if (~vp_reg_read(res, VP_SRESET) & VP_SRESET_PROCESSING) break;