From patchwork Mon May 9 10:48:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 12843318 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 70A46C433FE for ; Mon, 9 May 2022 10:50:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231460AbiEIKxu (ORCPT ); Mon, 9 May 2022 06:53:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231448AbiEIKxb (ORCPT ); Mon, 9 May 2022 06:53:31 -0400 Received: from fudo.makrotopia.org (fudo.makrotopia.org [IPv6:2a07:2ec0:3002::71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B73928716; Mon, 9 May 2022 03:49:00 -0700 (PDT) Received: from local by fudo.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.94.2) (envelope-from ) id 1no0wk-0000IX-Ef; Mon, 09 May 2022 12:48:58 +0200 Date: Mon, 9 May 2022 11:48:52 +0100 From: Daniel Golle To: linux-block@vger.kernel.org, linux-efi@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Tom Rini , Jens Axboe , Davidlohr Bueso , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Masahiro Yamada Subject: [PATCH v2 4/5] mtd_blkdevs: add option to enable scanning for partitions Message-ID: MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Add Kconfig boolean CONFIG_MTD_BLOCK_PARTITIONS and enable block partition parsers on non-NAND mtdblock devices in case it is selected. Signed-off-by: Daniel Golle --- drivers/mtd/Kconfig | 11 +++++++++++ drivers/mtd/mtd_blkdevs.c | 4 +++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index 796a2eccbef0b8..12874dec15692a 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -69,6 +69,17 @@ config MTD_BLOCK_RO You do not need this option for use with the DiskOnChip devices. For those, enable NFTL support (CONFIG_NFTL) instead. +config MTD_BLOCK_PARTITIONS + bool "Scan for partitions on MTD block devices" + depends on MTD_BLOCK || MTD_BLOCK_RO + default y if FIT_PARTITION + help + Scan MTD block devices for partitions (ie. MBR, GPT, uImage.FIT, ...). + (NAND devices are omitted, ubiblock should be used instead when) + + Unless your MTD partitions contain sub-partitions mapped using a + partition table, say no. + comment "Note that in some cases UBI block is preferred. See MTD_UBI_BLOCK." depends on MTD_BLOCK || MTD_BLOCK_RO diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index f7317211146550..c67ce2e6fbeb0a 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -359,7 +359,9 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) } else { snprintf(gd->disk_name, sizeof(gd->disk_name), "%s%d", tr->name, new->devnum); - gd->flags |= GENHD_FL_NO_PART; + + if (!IS_ENABLED(CONFIG_MTD_BLOCK_PARTITIONS) || mtd_type_is_nand(new->mtd)) + gd->flags |= GENHD_FL_NO_PART; } set_capacity(gd, ((u64)new->size * tr->blksize) >> 9);