From patchwork Tue Feb 7 01:42:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 651482 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 61FC9C05027 for ; Tue, 7 Feb 2023 01:44:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229711AbjBGBoT (ORCPT ); Mon, 6 Feb 2023 20:44:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229726AbjBGBn2 (ORCPT ); Mon, 6 Feb 2023 20:43:28 -0500 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C340E3668C for ; Mon, 6 Feb 2023 17:42:51 -0800 (PST) Received: by mail-pj1-x1049.google.com with SMTP id dt6-20020a17090afa4600b00230183006c3so5292208pjb.7 for ; Mon, 06 Feb 2023 17:42:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=YX1zBRfC33D3rDRElKAdT20jJS5RQeSlv0JzqWYnjho=; b=UGmq1xHhmv8QgalRGnvex5vaBwzzKCS6zloJhLFOA04JYhf7s2xljRYpy9kTAoNsHa iBC98QSDMciwj7mZAoPpI2usajIcl1gF62f5Z4nG2GjxXwW1tEOTSt3uCwYi8iyDdG37 BQfwQH+F5b5B8hHp73/BToUo9eBPbPtsoJG7VHsq9ww2xJmU91i6mybd4OadC8hcmn4L z/JS/fusQ1z+bJZfl9x8ljB4BFuvxFXBUNKd3sGG9GJYtq6qpJhSHd3ZvicyZg0osOk+ QxgZAlVpjyrodYVEXosDI3FM0qnhjaVmzWT6ld85NejZtUeLAUKpBMz5nIKrGLcp4W86 p/oQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=YX1zBRfC33D3rDRElKAdT20jJS5RQeSlv0JzqWYnjho=; b=lpJJIbbQrnhAbJW6Rs+IMO3lHq9m+jNTGjlWfRi7OPLOnCEGgqZLS9X9HANd5fNbu0 yy9A33Iu4YF5C8DAGAmr9MdwZfefAtWHHis0X8bJvRVJyUBUmfVjzonZfulrudbKk1uf +kwXS2LUZ4wl7Y64hqV5Ac30G2kttTTNbQPcCaj0VLZFXyckjnzMO8GNMvDYu6vZ2ziR GZ3Gx6PpsEv0+llBU+Q0+NRp2H0BI+h5RyBkZtoWDLawYEcwO1OFTFVifSv+em/yVZik iSyrocrKIpaqmKfXJplFYBta7KwKs7J6K9obu2GCxeYfrU8lFwTZFRszEYrVbpLeUgsH tHxg== X-Gm-Message-State: AO0yUKUhp0ey+YtYrYGWALdb8lFeKgqAKLn/x6T9jwGZ9msoP65BiSFU t1EP0aUvjmkWI/wl2Rca+mUecGNTJudk0Qs= X-Google-Smtp-Source: AK7set8Gcli9J3BzSmSCx9wcmgEyp38uzEhI1HIWAsHDVULR2jB9pwdeXZpjU2A6RPq1Ak9f9gnun0I1Kq/a1mU= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:ae1:aba6:f21c:4a94]) (user=saravanak job=sendgmr) by 2002:a17:90a:1d4e:b0:230:ae97:c349 with SMTP id u14-20020a17090a1d4e00b00230ae97c349mr441075pju.8.1675734163194; Mon, 06 Feb 2023 17:42:43 -0800 (PST) Date: Mon, 6 Feb 2023 17:42:04 -0800 In-Reply-To: <20230207014207.1678715-1-saravanak@google.com> Message-Id: <20230207014207.1678715-13-saravanak@google.com> Mime-Version: 1.0 References: <20230207014207.1678715-1-saravanak@google.com> X-Mailer: git-send-email 2.39.1.519.gcb327c4b5f-goog Subject: [PATCH v3 12/12] mtd: mtdpart: Don't create platform device that'll never probe From: Saravana Kannan To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Sudeep Holla , Cristian Marussi , Linus Walleij , Bartosz Golaszewski , Thomas Gleixner , Marc Zyngier , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Frank Rowand , Geert Uytterhoeven , Magnus Damm , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Len Brown , Saravana Kannan , " =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= " Cc: Abel Vesa , Alexander Stein , Tony Lindgren , Geert Uytterhoeven , John Stultz , Doug Anderson , Guenter Roeck , Dmitry Baryshkov , Maxim Kiselev , Maxim Kochetkov , Luca Weiss , Colin Foster , Martin Kepplinger , Jean-Philippe Brucker , Vladimir Oltean , kernel-team@android.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-acpi@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org These "nvmem-cells" platform devices never get probed because there's no platform driver for it and it's never used anywhere else. So it's a waste of memory. These devices also cause fw_devlink to block nvmem consumers of "nvmem-cells" partition from probing because the supplier device never probes. So stop creating platform devices for nvmem-cells partitions to avoid wasting memory and to avoid blocking probing of consumers. Reported-by: Maxim Kiselev Fixes: bcdf0315a61a ("mtd: call of_platform_populate() for MTD partitions") Signed-off-by: Saravana Kannan --- drivers/mtd/mtdpart.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index d442fa94c872..85f5ee6f06fc 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -577,6 +577,7 @@ static int mtd_part_of_parse(struct mtd_info *master, { struct mtd_part_parser *parser; struct device_node *np; + struct device_node *child; struct property *prop; struct device *dev; const char *compat; @@ -594,6 +595,15 @@ static int mtd_part_of_parse(struct mtd_info *master, else np = of_get_child_by_name(np, "partitions"); + /* + * Don't create devices that are added to a bus but will never get + * probed. That'll cause fw_devlink to block probing of consumers of + * this partition until the partition device is probed. + */ + for_each_child_of_node(np, child) + if (of_device_is_compatible(child, "nvmem-cells")) + of_node_set_flag(child, OF_POPULATED); + of_property_for_each_string(np, "compatible", prop, compat) { parser = mtd_part_get_compatible_parser(compat); if (!parser)