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 8BAAEC433F5 for ; Wed, 5 Jan 2022 16:43:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241990AbiAEQnm convert rfc822-to-8bit (ORCPT ); Wed, 5 Jan 2022 11:43:42 -0500 Received: from mail4.swissbit.com ([176.95.1.100]:40850 "EHLO mail4.swissbit.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235747AbiAEQni (ORCPT ); Wed, 5 Jan 2022 11:43:38 -0500 Received: from mail4.swissbit.com (localhost [127.0.0.1]) by DDEI (Postfix) with ESMTP id 40B6F1231A8; Wed, 5 Jan 2022 17:43:36 +0100 (CET) Received: from mail4.swissbit.com (localhost [127.0.0.1]) by DDEI (Postfix) with ESMTP id 3032D122E00; Wed, 5 Jan 2022 17:43:36 +0100 (CET) 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 mail4.swissbit.com (Postfix) with ESMTPS; Wed, 5 Jan 2022 17:43:36 +0100 (CET) Received: from sbdeex02.sbitdom.lan (10.149.2.84) 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 15.2.986.14; Wed, 5 Jan 2022 17:43:35 +0100 Received: from sbdeex02.sbitdom.lan ([fe80::e0eb:ade8:2d90:1f74]) by sbdeex02.sbitdom.lan ([fe80::e0eb:ade8:2d90:1f74%8]) with mapi id 15.02.0986.014; Wed, 5 Jan 2022 17:43:35 +0100 From: =?iso-8859-1?Q?Christian_L=F6hle?= To: "ulf.hansson@linaro.org" , =?iso-8859-1?Q?Christian_L=F6hle?= , "linux-mmc@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Avri Altman Subject: [PATCH] mmc: block: fix read single on recovery logic Thread-Topic: [PATCH] mmc: block: fix read single on recovery logic Thread-Index: AQHYAlL02lgrcWpb+EOcEaPCcQdJlw== Date: Wed, 5 Jan 2022 16:43:35 +0000 Message-ID: <5e5f2e45d0a14a55a8b7a9357846114b@hyperstone.com> Accept-Language: en-US, de-DE Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.154.1.4] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-TMASE-Version: DDEI-5.1-8.6.1018-26636.001 X-TMASE-Result: 10--2.408700-10.000000 X-TMASE-MatchedRID: GBgFBUqwD4F0/jNwxBmuZiyKzJY7d2nbunSyiaV8TbOUCwv1X+STMl2d sxCRbuoB8FHDcHdF1rYVKH14MhLRlzdhl84+mwvCqg0gbtLVIa9uchTq5J5u9LytS1u1Z7z6a3A 6hcNu8nD0YXQzpNvE/P5nI8KIHQ65o1cymYpfRxUzL6MySEJ0VvmoZ6x4ZgCU+frbXg+Uc4XbJM bTT9K/Ta3aC25avUua2v4PzRk1tzI5s4xK97Sm/8cAZFxtq8nGfrTt+hmA5bKTsyhw1KPqkJyoU xokiBvh4vM1YF6AJbZ0uL0K7fOJNyAHAopEd76vRiK5VgwNkzoXKKE/gxfQuw/o6vK5qgcSrdc8 vz7URqK3qhmDdxKBFQ== X-TMASE-SNAP-Result: 1.821001.0001-0-1-22:0,33:0,34:0-0 X-TMASE-INERTIA: 0-0;;;; X-TMASE-XGENCLOUD: 29473343-c73e-473e-a9cf-b5bcb904cece-0-0-200-0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On reads with MMC_READ_MULTIPLE_BLOCK that fail, the recovery handler will use MMC_READ_SINGLE_BLOCK for each of the blocks, up to MMC_READ_SINGLE_RETRIES times each. The logic for this is fixed to never report unsuccessful reads as success to the block layer. On command error with retries remaining, blk_update_request was called with whatever value error was set last to. In case it was last set to BLK_STS_OK (default), the read will be reported as success, even though there was no data read from the device. This could happen on a CRC mismatch for the response, a card rejecting the command (e.g. again due to a CRC mismatch). In case it was last set to BLK_STS_IOERR, the error is reported correctly, but no retries will be attempted. The patch now will count both command and data errors as retries and send BLK_STS_IOERR if there are no retries remaining, or BLK_STS_OK if the single read was successful in the meantime. Signed-off-by: Christian Loehle --- drivers/mmc/core/block.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 90e1bcd03b46..d7d880ce0f8a 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -1682,31 +1682,31 @@ static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) struct mmc_card *card = mq->card; struct mmc_host *host = card->host; blk_status_t error = BLK_STS_OK; - int retries = 0; do { u32 status; int err; + int retries = 0; - mmc_blk_rw_rq_prep(mqrq, card, 1, mq); + while (retries++ < MMC_READ_SINGLE_RETRIES) { + mmc_blk_rw_rq_prep(mqrq, card, 1, mq); - mmc_wait_for_req(host, mrq); + mmc_wait_for_req(host, mrq); - err = mmc_send_status(card, &status); - if (err) - goto error_exit; - - if (!mmc_host_is_spi(host) && - !mmc_ready_for_data(status)) { - err = mmc_blk_fix_state(card, req); + err = mmc_send_status(card, &status); if (err) goto error_exit; - } - if (mrq->cmd->error && retries++ < MMC_READ_SINGLE_RETRIES) - continue; + if (!mmc_host_is_spi(host) && + !mmc_ready_for_data(status)) { + err = mmc_blk_fix_state(card, req); + if (err) + goto error_exit; + } - retries = 0; + if (!mrq->cmd->error && !mrq->data->error) + break; + } if (mrq->cmd->error || mrq->data->error || -- 2.34.1 Hyperstone GmbH | Reichenaustr. 39a | 78467 Konstanz Managing Director: Dr. Jan Peter Berns. 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