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 63F62C433EF for ; Fri, 24 Jun 2022 13:58:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232199AbiFXN6u convert rfc822-to-8bit (ORCPT ); Fri, 24 Jun 2022 09:58:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232073AbiFXN6r (ORCPT ); Fri, 24 Jun 2022 09:58:47 -0400 Received: from mail3.swissbit.com (mail3.swissbit.com [176.95.1.57]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D92CE4DF4C; Fri, 24 Jun 2022 06:58:46 -0700 (PDT) Received: from mail3.swissbit.com (localhost [127.0.0.1]) by DDEI (Postfix) with ESMTP id EE26B462FA7; Fri, 24 Jun 2022 15:58:44 +0200 (CEST) Received: from mail3.swissbit.com (localhost [127.0.0.1]) by DDEI (Postfix) with ESMTP id DCEF9462F67; Fri, 24 Jun 2022 15:58:44 +0200 (CEST) X-TM-AS-ERS: 10.149.2.84-127.5.254.253 X-TM-AS-SMTP: 1.0 ZXguc3dpc3NiaXQuY29t Y2xvZWhsZUBoeXBlcnN0b25lLmNvbQ== X-DDEI-TLS-USAGE: Used Received: from ex.swissbit.com (SBDEEX02.sbitdom.lan [10.149.2.84]) by mail3.swissbit.com (Postfix) with ESMTPS; Fri, 24 Jun 2022 15:58:44 +0200 (CEST) Received: from sbdeex04.sbitdom.lan (10.149.2.42) by sbdeex02.sbitdom.lan (10.149.2.84) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.9; Fri, 24 Jun 2022 15:58:44 +0200 Received: from sbdeex02.sbitdom.lan (10.149.2.84) by sbdeex04.sbitdom.lan (10.149.2.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.9; Fri, 24 Jun 2022 15:58:44 +0200 Received: from sbdeex02.sbitdom.lan ([fe80::e0eb:ade8:2d90:1f74]) by sbdeex02.sbitdom.lan ([fe80::e0eb:ade8:2d90:1f74%8]) with mapi id 15.02.1118.009; Fri, 24 Jun 2022 15:58:44 +0200 From: =?iso-8859-1?Q?Christian_L=F6hle?= To: "ulf.hansson@linaro.org" , "linux-mmc@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Avri Altman , "adrian.hunter@intel.com" Subject: Re: [PATCH] mmc: block: Add single read for 4k sector cards Thread-Topic: [PATCH] mmc: block: Add single read for 4k sector cards Thread-Index: AdiH0i+lOTiMmBAQQCyuCs385lDFyw== Date: Fri, 24 Jun 2022 13:58:44 +0000 Message-ID: <9e171c7ba27b4377872379f7e211715c@hyperstone.com> Accept-Language: en-US, de-DE Content-Language: de-DE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.153.3.44] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-TMASE-Version: DDEI-5.1-9.0.1002-26974.007 X-TMASE-Result: 10-1.440300-10.000000 X-TMASE-MatchedRID: xSJL/ht5SGDUL3YCMmnG4pTQgFTHgkhZ6FML6creK7lM+b8yxBqvAyTn lmLOiwp22XHJ0L4jOITmn3xyPJAJoh2P280ZiGmR9k5nZzZVBSBHyz3bB5kG58bl1d1BOPY4A1/ 8jb+tZ/Tiu4lpe6VcbrQeFj3sWOU1XHEPHmpuRH0TNCcUsR4xSWrz/G/ZSbVq+gtHj7OwNO2I9t 8DSRevIQUgC/isct8xoUq2kgYY6i9QN35Inoone6nVU1udGaNpw8g2HBNcF5k= X-TMASE-SNAP-Result: 1.821001.0001-0-1-22:0,33:0,34:0-0 X-TMASE-INERTIA: 0-0;;;; X-TMASE-XGENCLOUD: 7e22f89b-23e0-432a-8b9d-b6306215b4f0-0-0-200-0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Anyone wanting to test this and does not have a way to disturb eMMC signals, use mmc-utils to disable 512B emulation and something along the lines of: diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 4b70cbfc6d5d..bc0b9241a00f 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -32,6 +32,8 @@ #include #include +#include + #define CREATE_TRACE_POINTS #include @@ -141,6 +143,12 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) struct mmc_command *cmd = mrq->cmd; int err = cmd->error; + if (mrq->data && !mrq->data->error && mrq->data->flags & MMC_DATA_READ) + if ((sched_clock() % 1000) == 0) { + mrq->data->bytes_xfered = 0; + mrq->data->error = -EILSEQ; + } + /* Flag re-tuning needed on CRC errors */ if (cmd->opcode != MMC_SEND_TUNING_BLOCK && cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 && Hyperstone GmbH | Reichenaustr. 39a | 78467 Konstanz Managing Director: Dr. Jan Peter Berns. Commercial register of local courts: Freiburg HRB381782