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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 1B5E5C2BA17 for ; Mon, 6 Apr 2020 16:10:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE57120768 for ; Mon, 6 Apr 2020 16:10:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cd1Bchu2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729279AbgDFQKC (ORCPT ); Mon, 6 Apr 2020 12:10:02 -0400 Received: from mail-pj1-f67.google.com ([209.85.216.67]:35457 "EHLO mail-pj1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728863AbgDFQKC (ORCPT ); Mon, 6 Apr 2020 12:10:02 -0400 Received: by mail-pj1-f67.google.com with SMTP id g9so49953pjp.0 for ; Mon, 06 Apr 2020 09:10:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=1WkoK9eOo3jxX/ZMr07VW5CQfweVLKsOKrOBu3dllxs=; b=cd1Bchu2c9ROFaCpeTSYw8aDQj9D/amAIE3E5AJ2sk4uajkqPr0368tcgzvZNw/gd5 A5KYbrIqj/6UHQdd420rCelaobfdCCx4exj75OWcKjgo9FWDqLL86GXRqLr/REYm7agu yQaexJqpfpP4jwbfEng5PlTVd8EWJ4g7mmxmotOdgL71Nn4cd68f2DIL6NYQNH0/Xw1S QLGYGGRfSDmUPLI1yI9Ga1IVA4OTZS/2QltXrHv4zRhsAzILKPbfzYUpOgfgRrBiZupF hKK8GHidAfqbbaYqeEqJtbwkxSJbFiWGvptuwMeIAxHUNHkw6W+aOozPmVkYo6V/h8yG +Hjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=1WkoK9eOo3jxX/ZMr07VW5CQfweVLKsOKrOBu3dllxs=; b=BDci9y5TbJp58OCJBDwIx7aT+xQZrQdDW+E+ulDBLffSMS/iuEVyww4ND2zBfsWlkM z7nO5Pkoi/CqTBdqDWlVIszQtRgo7gfhsL+eQzCu9Of/CiSUlt83OHjWl5Fv2KD+HoIQ xXeQ1fj/RcUD21Rt/DhMbp6oA1Ml+t4xwTYqFVmakmkoRYyu7VHCHS7jTi3wRbh1Rali 5cosCGcgZ0gjf8mqNzlz0XUx3l8EMwdGwyrZrIjRo09RnzX49R7fkIzbgsTkhLwBDomJ QcFqx5fpCKTZw9yr6m4tDkx3gRySR07teEcfYVgoh15WlrrnY9Sc64Q6DBAbIEL+LrnI CrJA== X-Gm-Message-State: AGi0PuakDIsd9PS2asCuqU1ZoFHQdJC3LLQBNFwnYQDxEaZ3qiAiocgH J+LugvcYHrW+eDOqVQcRKAI= X-Google-Smtp-Source: APiQypLW2+hk2HRhI7Td9Jl9Sdkz5Z5glDoXOKZEYa0pW703MJ9vJ5kxV4E+ghEwKkJw4Cv7ZtixkA== X-Received: by 2002:a17:90a:8909:: with SMTP id u9mr3007pjn.149.1586189401046; Mon, 06 Apr 2020 09:10:01 -0700 (PDT) Received: from minnich.svl.corp.google.com ([2620:15c:2c5:3:65f9:fd8e:a0b8:2917]) by smtp.googlemail.com with ESMTPSA id y3sm5242416pfy.6.2020.04.06.09.10.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2020 09:10:00 -0700 (PDT) From: "Ronald G. Minnich" X-Google-Original-From: "Ronald G. Minnich" To: miquel.raynal@bootlin.com, rminnich@google.com, richard@nod.at, vigneshr@ti.com, linus.walleij@linaro.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] mtd: parsers: Support '[]' for id in mtdparts Date: Mon, 6 Apr 2020 09:09:14 -0700 Message-Id: <20200406160914.14698-1-rminnich@google.com> X-Mailer: git-send-email 2.26.0.292.g33ef6b2f38-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The MTD subsystem can support command-line defined partitions for one or more MTD devices. The format is: * mtdparts=[; := :[,] The ':' separates the id from the partdef. On PCI MTD devices, the name can be the PCI slot name, e.g. 0000:00:1f.5. There are two ':' in the name alone. Change the definition of so it can be bracketed with '[]' and hence contain any number of ':'. An opening '[' must be matched with a closing ']'. The ':' continues to separate the mtd-id from the . Signed-off-by: Ronald G. Minnich Change-Id: I17a757e65f532b11606c7bb104f08837bcd444b9 --- drivers/mtd/parsers/cmdlinepart.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/parsers/cmdlinepart.c b/drivers/mtd/parsers/cmdlinepart.c index c86f2db8c882..ef9dc0bd7724 100644 --- a/drivers/mtd/parsers/cmdlinepart.c +++ b/drivers/mtd/parsers/cmdlinepart.c @@ -10,7 +10,8 @@ * mtdparts=[; := :[,] * := [@][][ro][lk] - * := unique name used in mapping driver/device (mtd->name) + * := unique name used in mapping driver/device (mtd->name) | + * '[' unique name as above, not including a "]" ']' * := standard linux memsize OR "-" to denote all remaining space * size is automatically truncated at end of device * if specified or truncated size is 0 the part is skipped @@ -221,14 +222,38 @@ static int mtdpart_setup_real(char *s) char *p, *mtd_id; mtd_id = s; + mtd_id_len = 0; + p = s; - /* fetch */ + /* + * fetch + * If the first char is '[', + * the form is [mtd-id]: + * otherwise it is mtd-id: + */ + if (*s == '[') { + mtd_id++; + p = strchr(s, ']'); + if (!p) { + pr_err("mtd (%s) has '[' but no ']'", s); + return -EINVAL; + } + mtd_id_len = p - mtd_id; + } + + /* There is always a : following mtd-id. */ p = strchr(s, ':'); if (!p) { pr_err("no mtd-id\n"); return -EINVAL; } - mtd_id_len = p - mtd_id; + + /* + * If the mtd-id was bracketed, mtd_id_len will be valid. + * If it is still 0, we must set it here. + */ + if (mtd_id_len == 0) + mtd_id_len = p - mtd_id; dbg(("parsing <%s>\n", p+1)); -- 2.26.0.292.g33ef6b2f38-goog