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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E232DC433F5 for ; Mon, 1 Nov 2021 09:20:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEA76610F7 for ; Mon, 1 Nov 2021 09:20:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231969AbhKAJXW (ORCPT ); Mon, 1 Nov 2021 05:23:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:58554 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231756AbhKAJWO (ORCPT ); Mon, 1 Nov 2021 05:22:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C6924610FD; Mon, 1 Nov 2021 09:19:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635758362; bh=Tgw7X/q2Ci6h1OcLm823jr813XWgLFPZSrlK9STE+vU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ldyoU5nbGpM9BUHv/rc5rRGh+O6uF6y1aVEuC9w0yxzJxV57bdCrpRaTWg1yLQUVR em3FL1Z75r05ACTXZzb6JwIcCfJW0z0stlTB7RX3KTNQmKY4FiHHUxIMW7biafDrAD Ynif6mMHRqWKFVz8WUK+suvB5mnIKgYFQAY1gQAY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jaehoon Chung , Marek Szyprowski , Christian Hewitt , Ulf Hansson Subject: [PATCH 4.9 12/20] mmc: dw_mmc: exynos: fix the finding clock sample value Date: Mon, 1 Nov 2021 10:17:21 +0100 Message-Id: <20211101082446.805656357@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211101082444.133899096@linuxfoundation.org> References: <20211101082444.133899096@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jaehoon Chung commit 697542bceae51f7620af333b065dd09d213629fb upstream. Even though there are candiates value if can't find best value, it's returned -EIO. It's not proper behavior. If there is not best value, use a first candiate value to work eMMC. Signed-off-by: Jaehoon Chung Tested-by: Marek Szyprowski Tested-by: Christian Hewitt Cc: stable@vger.kernel.org Fixes: c537a1c5ff63 ("mmc: dw_mmc: exynos: add variable delay tuning sequence") Link: https://lore.kernel.org/r/20211022082106.1557-1-jh80.chung@samsung.com Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/dw_mmc-exynos.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) --- a/drivers/mmc/host/dw_mmc-exynos.c +++ b/drivers/mmc/host/dw_mmc-exynos.c @@ -440,6 +440,18 @@ static s8 dw_mci_exynos_get_best_clksmpl } } + /* + * If there is no cadiates value, then it needs to return -EIO. + * If there are candiates values and don't find bset clk sample value, + * then use a first candiates clock sample value. + */ + for (i = 0; i < iter; i++) { + __c = ror8(candiates, i); + if ((__c & 0x1) == 0x1) { + loc = i; + goto out; + } + } out: return loc; } @@ -470,6 +482,8 @@ static int dw_mci_exynos_execute_tuning( priv->tuned_sample = found; } else { ret = -EIO; + dev_warn(&mmc->class_dev, + "There is no candiates value about clksmpl!\n"); } return ret;