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[209.132.180.67]) by mx.google.com with ESMTP id h49si6267209edh.2.2019.10.27.14.25.08; Sun, 27 Oct 2019 14:25:32 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=toZ10yMH; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730471AbfJ0VXh (ORCPT + 99 others); Sun, 27 Oct 2019 17:23:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:44722 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731704AbfJ0VXb (ORCPT ); Sun, 27 Oct 2019 17:23:31 -0400 Received: from localhost (100.50.158.77.rev.sfr.net [77.158.50.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F1ED0205C9; Sun, 27 Oct 2019 21:23:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572211411; bh=txFVa3o1tO0XS4afHK4M0KfRj3uMT4moVpCZDTRCnuQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=toZ10yMHw7FOdT58aXlKPLd4MpdK+BSI+A1ACI8JlWqFzlZI3XSFtY4QlOqBkiqjO SAMFN911EWUz+5uODWqo5Bs0au8VHblTTnv/u6nx/gAS8ETnwZaGLOq5Tj4L+wFXeh eLFp64ddHgq/Cc1qxb+XMmGBD66bYc+PdQ40MX8k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Faiz Abbas , Ulf Hansson Subject: [PATCH 5.3 143/197] mmc: sdhci-omap: Fix Tuning procedure for temperatures < -20C Date: Sun, 27 Oct 2019 22:01:01 +0100 Message-Id: <20191027203359.418304808@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191027203351.684916567@linuxfoundation.org> References: <20191027203351.684916567@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Faiz Abbas commit feb40824d78eac5e48f56498dca941754dff33d7 upstream. According to the App note[1] detailing the tuning algorithm, for temperatures < -20C, the initial tuning value should be min(largest value in LPW - 24, ceil(13/16 ratio of LPW)). The largest value in LPW is (max_window + 4 * (max_len - 1)) and not (max_window + 4 * max_len) itself. Fix this implementation. [1] http://www.ti.com/lit/an/spraca9b/spraca9b.pdf Fixes: 961de0a856e3 ("mmc: sdhci-omap: Workaround errata regarding SDR104/HS200 tuning failures (i929)") Cc: stable@vger.kernel.org Signed-off-by: Faiz Abbas Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdhci-omap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mmc/host/sdhci-omap.c +++ b/drivers/mmc/host/sdhci-omap.c @@ -372,7 +372,7 @@ static int sdhci_omap_execute_tuning(str * on temperature */ if (temperature < -20000) - phase_delay = min(max_window + 4 * max_len - 24, + phase_delay = min(max_window + 4 * (max_len - 1) - 24, max_window + DIV_ROUND_UP(13 * max_len, 16) * 4); else if (temperature < 20000)