From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9ABE73BB48 for ; Wed, 15 Nov 2023 19:55:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UYu09U5t" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C385C433C8; Wed, 15 Nov 2023 19:55:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700078140; bh=qq+pQWndxCbzLlHkOtEBqm1nwkr5IyBnqrzwIF2OXVI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UYu09U5tcwbYKWSVwq72MW0ZLRgDiGm7NnckoIkqI0mODPjEhg4NH820EEZ245nrM jtbaxDAvTENp/mqONZ5EstVyFgZ627UKS02RGt7eI2jBdKjWa6891JBakoVy0FfXoF rAP42TTmYF3aTGnmHcIXFGiYz0M1mjoxG9By4xPo= 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 6.1 134/379] drm/bridge: tc358768: Fix tc358768_ns_to_cnt() Date: Wed, 15 Nov 2023 14:23:29 -0500 Message-ID: <20231115192653.057214581@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115192645.143643130@linuxfoundation.org> References: <20231115192645.143643130@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-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 5fd89596c9a20..8429b6518b502 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -631,7 +631,7 @@ 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