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 CBB81C54FB9 for ; Wed, 15 Nov 2023 19:43:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235089AbjKOTnC (ORCPT ); Wed, 15 Nov 2023 14:43:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41216 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235103AbjKOTnA (ORCPT ); Wed, 15 Nov 2023 14:43:00 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6AF6E1A8 for ; Wed, 15 Nov 2023 11:42:57 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC1D6C433C8; Wed, 15 Nov 2023 19:42:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700077377; bh=uAu9TkhZDFYlKSsKTNw54iMinCS2NinbrphEGDhuDOk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H98kLoJYGKFEVYqG/1Q9jlYaiV+9TXTX9RLOOch1uZ0KB1Y6eDdnI8BBJIqBKIJ4j AMgXLelxAGEoMJI07loFS25qelJ/NRsOMbfNVAKr00K33W7eu1pzCthKV2eqq0TJTm Vr33hdxjXw3jX9tCkRB9h6B8IDEykkKsMQ5CRFn0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Peter Ujfalusi , Marcel Ziswiler , Tomi Valkeinen , Robert Foss , Sasha Levin , Maxim Schwalm Subject: [PATCH 6.6 239/603] drm/bridge: tc358768: Fix tc358768_ns_to_cnt() Date: Wed, 15 Nov 2023 14:13:04 -0500 Message-ID: <20231115191629.743563800@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191613.097702445@linuxfoundation.org> References: <20231115191613.097702445@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomi Valkeinen [ Upstream commit f1dabbe645065d20ca863c8d446c74c59ca1ca9d ] The tc358768_ns_to_cnt() is, most likely, supposed to do a div-round-up operation, but it misses subtracting one from the dividend. Fix this by just using DIV_ROUND_UP(). Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver") Reviewed-by: Peter Ujfalusi Tested-by: Maxim Schwalm # Asus TF700T Tested-by: Marcel Ziswiler Signed-off-by: Tomi Valkeinen Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20230906-tc358768-v4-11-31725f008a50@ideasonboard.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/tc358768.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index d1000d1f69f4e..6eed5c4232956 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -630,7 +630,7 @@ static int tc358768_setup_pll(struct tc358768_priv *priv, static u32 tc358768_ns_to_cnt(u32 ns, u32 period_ps) { - return (ns * 1000 + period_ps) / period_ps; + return DIV_ROUND_UP(ns * 1000, period_ps); } static u32 tc358768_ps_to_ns(u32 ps) -- 2.42.0