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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0EE69C3A5A8 for ; Wed, 4 Sep 2019 18:02:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D570222CF5 for ; Wed, 4 Sep 2019 18:02:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620134; bh=8XGpZNUio1W7mgwl+llBK/s9QyI+imtyhJPb9C6TdJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=l+O25rmQCQNOSdUBkiDxJi1gsVaGq1QuLs52+IfgFTZ53g79C2gFzT4N+z4aXRwAl TChkcoiN696vpCdEZ5e4Ym+VrvxNEOzsRTcbwFsJYCfXB++heuLHbWhazxwfHfbJlv 7Ow/AyhE8gtGNI2tRV+W4LPxMSuHsCdggepsHjw4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388717AbfIDSCN (ORCPT ); Wed, 4 Sep 2019 14:02:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:41956 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388701AbfIDSCK (ORCPT ); Wed, 4 Sep 2019 14:02:10 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 036EB22CF5; Wed, 4 Sep 2019 18:02:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620129; bh=8XGpZNUio1W7mgwl+llBK/s9QyI+imtyhJPb9C6TdJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gh7Sv+3xsf/+uvYYw6mnvTPJQeUai6iK8IpM0i1If+9bmPjG7F09F+FsTU9TSJdr3 +PodMzFCmazL3nPNm8pA4ImAF4dLBf8oqXCWdTFnuQqZ7ZzDb3Apcjs7JnKVjGApHA 9v9QE/qXEJIzttBhsQ2wkkqfsMvWt/Qw94oVVMUI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Philip Langdale , Ulf Hansson , Manuel Presnitz Subject: [PATCH 4.9 75/83] mmc: core: Fix init of SD cards reporting an invalid VDD range Date: Wed, 4 Sep 2019 19:54:07 +0200 Message-Id: <20190904175310.199461467@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190904175303.488266791@linuxfoundation.org> References: <20190904175303.488266791@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: Ulf Hansson commit 72741084d903e65e121c27bd29494d941729d4a1 upstream. The OCR register defines the supported range of VDD voltages for SD cards. However, it has turned out that some SD cards reports an invalid voltage range, for example having bit7 set. When a host supports MMC_CAP2_FULL_PWR_CYCLE and some of the voltages from the invalid VDD range, this triggers the core to run a power cycle of the card to try to initialize it at the lowest common supported voltage. Obviously this fails, since the card can't support it. Let's fix this problem, by clearing invalid bits from the read OCR register for SD cards, before proceeding with the VDD voltage negotiation. Cc: stable@vger.kernel.org Reported-by: Philip Langdale Signed-off-by: Ulf Hansson Reviewed-by: Philip Langdale Tested-by: Philip Langdale Tested-by: Manuel Presnitz Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/core/sd.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -1259,6 +1259,12 @@ int mmc_attach_sd(struct mmc_host *host) goto err; } + /* + * Some SD cards claims an out of spec VDD voltage range. Let's treat + * these bits as being in-valid and especially also bit7. + */ + ocr &= ~0x7FFF; + rocr = mmc_select_voltage(host, ocr); /*