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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 DE0A4C43613 for ; Thu, 20 Jun 2019 07:13:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C09EA2084A for ; Thu, 20 Jun 2019 07:13:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730020AbfFTHNT (ORCPT ); Thu, 20 Jun 2019 03:13:19 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:47012 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725889AbfFTHNS (ORCPT ); Thu, 20 Jun 2019 03:13:18 -0400 Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:5cf4:84a1:2763:fe0d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: bbrezillon) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 5F3D82639EC; Thu, 20 Jun 2019 08:13:17 +0100 (BST) Date: Thu, 20 Jun 2019 09:13:14 +0200 From: Boris Brezillon To: liaoweixiong Cc: Miquel Raynal , Richard Weinberger , David Woodhouse , Brian Norris , Marek Vasut , Vignesh Raghavendra , Boris Brezillon , Frieder Schrempf , Peter Pan , Jeff Kletsky , Schrempf Frieder , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] mtd: spinand: read return badly if the last page has bitflips Message-ID: <20190620091314.70bc99a2@collabora.com> In-Reply-To: <1560992416-5753-1-git-send-email-liaoweixiong@allwinnertech.com> References: <1560992416-5753-1-git-send-email-liaoweixiong@allwinnertech.com> Organization: Collabora X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 20 Jun 2019 09:00:16 +0800 liaoweixiong wrote: > In case of the last page containing bitflips (ret > 0), > spinand_mtd_read() will return that number of bitflips for the last > page. But to me it looks like it should instead return max_bitflips like > it does when the last page read returns with 0. > > Signed-off-by: liaoweixiong Reviewed-by: Boris Brezillon > --- > drivers/mtd/nand/spi/core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c > index 556bfdb..6b9388d 100644 > --- a/drivers/mtd/nand/spi/core.c > +++ b/drivers/mtd/nand/spi/core.c > @@ -511,12 +511,12 @@ static int spinand_mtd_read(struct mtd_info *mtd, loff_t from, > if (ret == -EBADMSG) { > ecc_failed = true; > mtd->ecc_stats.failed++; > - ret = 0; > } else { > mtd->ecc_stats.corrected += ret; > max_bitflips = max_t(unsigned int, max_bitflips, ret); > } > > + ret = 0; > ops->retlen += iter.req.datalen; > ops->oobretlen += iter.req.ooblen; > }