From patchwork Tue Aug 1 21:54:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Herring X-Patchwork-Id: 129502 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f41:0:b0:3e4:2afc:c1 with SMTP id v1csp45096vqx; Tue, 1 Aug 2023 15:14:45 -0700 (PDT) X-Google-Smtp-Source: APBJJlGNwHEXChGkVyNvJVGvaKf0m0ys+GUgiVs9jPhgDCdim65dUxz+1/UJkQQX344q3fnIkh5q X-Received: by 2002:a17:902:f691:b0:1b4:5699:aac1 with SMTP id l17-20020a170902f69100b001b45699aac1mr16861041plg.12.1690928085343; Tue, 01 Aug 2023 15:14:45 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690928085; cv=none; d=google.com; s=arc-20160816; b=zrZE676DoZ8oofOiKVVAUv+hJIdpAiQUKarlIJXoVobncS9G2drvPYaLe2/0uUGFam 5cnKyZHOC40Qv8SGvI8rE67sIf6678V0k+I8uuevmpgpC2S15Txf5TI5/h8YdxzrZHZY qcxRQ7PxSjE+6pa3srUdo+1qoZPxCjRZkG/eNIwkzH1M8Eg3M/sJIXqHrKllWQcSImlJ AJFcwDYN8eb3Qcz3vcPUemo8iudMSVCKtVj69QhemnAp75EMLqx7GwF/KhbGa9cXKhaA Xm6Ds4s//NqOiHmt4hJaHp8UtjytivPfE11DAe05uvIy5+vaZ9EZHyDdqNhCLdwuheT2 BIkQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=iwOKhldd//5NSr5g4mvls+vNNI8MfV3Glhg5hiBOe38=; fh=9muYjwzOjeujIiOiqgEm7G2SJDFzcm638Q1NXjJ2Sec=; b=sfjqZ126uj2Y3ysDeihMoKFGtqtJWj+XmI7qArp8SJkkseh4GgdU/GonLqIBlIkg4P /vRCNRflJBZ4z1ngwVCDYaVL26qd4GutXcFNrwA9/COoxUYD4MGzBKFVS6tIaYY82gZb n0089dKKahRitWw7pF4MwBtKMQG1gqmE7+hnTCAIXCbM0bYP31tqZDrPWPnjYl126OVa lPh2b0j0gKoRk6nh4w8AUoBbGZdTEntwHlvBlS/g8D7KT1kzi9FKJpYwnZ4LGbMXYaLM StAYAMQKSDJJAccExUy55u69y3TUGvSN6G0OOmbWxqmyRGANAK2jxP89oaPTFvwY4y0q zRZw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=i3lVzoPk; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id q7-20020a170902a3c700b001bb162e944dsi66479plb.51.2023.08.01.15.14.23; Tue, 01 Aug 2023 15:14:45 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=i3lVzoPk; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232795AbjHAVzc (ORCPT + 99 others); Tue, 1 Aug 2023 17:55:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232764AbjHAVzX (ORCPT ); Tue, 1 Aug 2023 17:55:23 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1A121BE3; Tue, 1 Aug 2023 14:55:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6C60161717; Tue, 1 Aug 2023 21:55:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C9F1C433C7; Tue, 1 Aug 2023 21:55:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690926921; bh=B054y3pqR16hOaTgxhtMZYYzfM1FPP+fTzP45gff++8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=i3lVzoPkWKvatlAmGtmtZECfXTJmytvIw9nVWdr1PT0cPMUlXdaC4BrjgQUKrc/r1 HI8JWAgR+bsku8IV6iID66RJ6I4BEEQW0uvKLmlQBNTJnjr0WdA4Aj/3Mc6b+ebeHX bLul4tGlWmh8OP9DpwZ0xeRvTiK+0fV+6wSvGiP7pD16WgyKWyvo+A0ak/Iq4cppJw mWgtZsU5uBmSNS7/OoaDhUjRIpGoqWPAinj+/lh4hHuxssa+7HY5iofVwVEzcY0LJz mns8ArNf+IUHmlGwbWCt9HozXfTCtVPH/oNSDSVahcdLT6y0MJNcoGuqrwdkISq2Kh gmykdmkURTe3w== Received: (nullmailer pid 2469337 invoked by uid 1000); Tue, 01 Aug 2023 21:55:14 -0000 From: Rob Herring Date: Tue, 01 Aug 2023 15:54:44 -0600 Subject: [PATCH 1/5] of: unittest: Fix EXPECT for parse_phandle_with_args_map() test MIME-Version: 1.0 Message-Id: <20230801-dt-changeset-fixes-v1-1-b5203e3fc22f@kernel.org> References: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> In-Reply-To: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> To: Frank Rowand , "Enrico Weigelt, metux IT consult" , "Rafael J. Wysocki" , Sakari Ailus , Petr Mladek , Andy Shevchenko , Geert Uytterhoeven Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773066607706368913 X-GMAIL-MSGID: 1773066607706368913 Commit 12e17243d8a1 ("of: base: improve error msg in of_phandle_iterator_next()") added printing of the phandle value on error, but failed to update the unittest. Fixes: 12e17243d8a1 ("of: base: improve error msg in of_phandle_iterator_next()") Signed-off-by: Rob Herring --- drivers/of/unittest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index e5b0eea8011c..d943bf87c94d 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -664,12 +664,12 @@ static void __init of_unittest_parse_phandle_with_args_map(void) memset(&args, 0, sizeof(args)); EXPECT_BEGIN(KERN_INFO, - "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle"); + "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678"); rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle", "phandle", 0, &args); EXPECT_END(KERN_INFO, - "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle"); + "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678"); unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); From patchwork Tue Aug 1 21:54:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Herring X-Patchwork-Id: 129520 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f41:0:b0:3e4:2afc:c1 with SMTP id v1csp75520vqx; Tue, 1 Aug 2023 16:22:12 -0700 (PDT) X-Google-Smtp-Source: APBJJlEEbQoaz/ty2uRRK38o74rkwMTGmtxGJJ0Q8WXKjd7binaCU3giWPTwFkDKBhlx1IpuBvkt X-Received: by 2002:a05:6808:4088:b0:3a7:249d:8733 with SMTP id db8-20020a056808408800b003a7249d8733mr7597058oib.40.1690932132476; Tue, 01 Aug 2023 16:22:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690932132; cv=none; d=google.com; s=arc-20160816; b=c295SjceAJ0WbaEUj88Tw5pycCyzp+TrgOl6oQ2YR+Uo5R+Rx5d17hozWtMSXCv4rR xLetRAlFc7VOpUt62VMWYNQubsLqd6XOuoS5hl+tsUcHFOA7ZP7pIdTAMRkTojfAoCLv G99k6U7vXtxTvPW4BZrQODcZ1H4ots16FUpNpIlPCeB1ZBUg+Vz7D1XqVPIVJUFWQF1q 5rKrpdQxM1hc8/2gQdy9FoGTi+WBShVxD0RfqJBGLf4NKR3m561tWcUjRC8wscRgm2L6 AuyhhSJ2PXn7n42TZ9RjCqhj8/jL7nKQIx38Z81yQeQqpfVHhC0BXuXvm8aVQEFG42cN 9ZwA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=g6JZc1WfvP5U4B9TrnVjKmeVaJ7IpZgV5TmCzX3OYlU=; fh=9muYjwzOjeujIiOiqgEm7G2SJDFzcm638Q1NXjJ2Sec=; b=h8WMzYskkb1De0X0r1bPqcI2yaaLh336zbTSMyEiZvrFAp4+M50rVPPhDDkAs0VBHE mqBbsiCeHdI78LDYM15En4DBNJHZdFlDUrgSWzx0IqcIlhvNVYQ272DLjDrzEZrMDz4q CEpw3miE+hJHJtEnx2+dQEXqtuFyTF4u0Nc1/EddtypL9jO42QLkiyg5ACpqE9Z4DFb7 JUDZece1UaSPZ6PLHEAD+ivqO/tMWWgxuvDyW7bq1QTfQSJXYjO+wL2RNL595Ph2Ot02 eMBK1baWGioZUeSyFLlC79bNLofEwQXJrS+GU8cvDbo6U05Kai1oPUtePrmLuCw4B0Q6 PNdw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=S4716JGH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id 17-20020a630211000000b0056334ba88easi5835434pgc.263.2023.08.01.16.21.58; Tue, 01 Aug 2023 16:22:12 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=S4716JGH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232768AbjHAVz0 (ORCPT + 99 others); Tue, 1 Aug 2023 17:55:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232749AbjHAVzW (ORCPT ); Tue, 1 Aug 2023 17:55:22 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66F6C212A; Tue, 1 Aug 2023 14:55:19 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DB8F361716; Tue, 1 Aug 2023 21:55:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88391C433C9; Tue, 1 Aug 2023 21:55:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690926918; bh=5XERczcs3rSSs3MOT5bfWrqodT+KqtbFCljGkj26Qso=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=S4716JGHvOW8JlVDLOk1uy46CUyveQNNd67rR7s0GcQ8PSL6Yyj7t6STWJUlIlu8J L+2GwmsI1jS1/wz0J4D6vtB67PpU2ARyd/cnVNf9B7mOvcNDPYNeMCRCkqd1OOAnw1 +rQ8rxsPCsGfKSy3bJeYKpajwu28+mshWysoT8lQgdCdurB13ziolzzT7ynKPqgNt3 5yNi0fxVJyBlf4gOqwnTzL0qs70rSx5ttXqr46+aV2b8eX8VUr+F6SIpCeqwDiFDPr 1KOtCkpQx85yENTQJlyxiPzqtVpMUqrKsGruAn9EejfmY2dmyNQDE3BrTj0NsjckoP dY4DuNcDjbo1g== Received: (nullmailer pid 2469339 invoked by uid 1000); Tue, 01 Aug 2023 21:55:14 -0000 From: Rob Herring Date: Tue, 01 Aug 2023 15:54:45 -0600 Subject: [PATCH 2/5] of: dynamic: Refactor action prints to not use "%pOF" inside devtree_lock MIME-Version: 1.0 Message-Id: <20230801-dt-changeset-fixes-v1-2-b5203e3fc22f@kernel.org> References: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> In-Reply-To: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> To: Frank Rowand , "Enrico Weigelt, metux IT consult" , "Rafael J. Wysocki" , Sakari Ailus , Petr Mladek , Andy Shevchenko , Geert Uytterhoeven Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773070851687465007 X-GMAIL-MSGID: 1773070851687465007 While originally it was fine to format strings using "%pOF" while holding devtree_lock, this now causes a deadlock. Lockdep reports: of_get_parent from of_fwnode_get_parent+0x18/0x24 ^^^^^^^^^^^^^ of_fwnode_get_parent from fwnode_count_parents+0xc/0x28 fwnode_count_parents from fwnode_full_name_string+0x18/0xac fwnode_full_name_string from device_node_string+0x1a0/0x404 device_node_string from pointer+0x3c0/0x534 pointer from vsnprintf+0x248/0x36c vsnprintf from vprintk_store+0x130/0x3b4 To fix this, move the printing in __of_changeset_entry_apply() outside the lock. As there's already similar printing of the same changeset actions, refactor all of them to use a common action print function. This has the side benefit of getting rid of some ifdefs. Fixes: a92eb7621b9fb2c2 ("lib/vsprintf: Make use of fwnode API to obtain node names and separators") Reported-by: Geert Uytterhoeven Signed-off-by: Rob Herring --- v3: - Add missing 'static' reported by 0-day v1 and v2 from Geert simply moved the devtree_lock into each case statement: https://lore.kernel.org/all/c593d8389352c574b5be69d4ca4810da13326a50.1690533838.git.geert+renesas@glider.be/ --- drivers/of/dynamic.c | 80 ++++++++++++---------------------------------------- 1 file changed, 18 insertions(+), 62 deletions(-) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index e311d406b170..aa3821836937 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -63,37 +63,31 @@ int of_reconfig_notifier_unregister(struct notifier_block *nb) } EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister); -#ifdef DEBUG -const char *action_names[] = { +static const char *action_names[] = { [OF_RECONFIG_ATTACH_NODE] = "ATTACH_NODE", [OF_RECONFIG_DETACH_NODE] = "DETACH_NODE", [OF_RECONFIG_ADD_PROPERTY] = "ADD_PROPERTY", [OF_RECONFIG_REMOVE_PROPERTY] = "REMOVE_PROPERTY", [OF_RECONFIG_UPDATE_PROPERTY] = "UPDATE_PROPERTY", }; -#endif + +static void of_changeset_action_print(unsigned long action, struct device_node *np, + const char *prop_name) +{ + if (prop_name) + pr_cont("%-15s %pOF:%s\n", action_names[action], np, prop_name); + else + pr_cont("%-15s %pOF\n", action_names[action], np); +} int of_reconfig_notify(unsigned long action, struct of_reconfig_data *p) { int rc; -#ifdef DEBUG struct of_reconfig_data *pr = p; - switch (action) { - case OF_RECONFIG_ATTACH_NODE: - case OF_RECONFIG_DETACH_NODE: - pr_debug("notify %-15s %pOF\n", action_names[action], - pr->dn); - break; - case OF_RECONFIG_ADD_PROPERTY: - case OF_RECONFIG_REMOVE_PROPERTY: - case OF_RECONFIG_UPDATE_PROPERTY: - pr_debug("notify %-15s %pOF:%s\n", action_names[action], - pr->dn, pr->prop->name); - break; + if (pr_debug("notify ")) + of_changeset_action_print(action, pr->dn, pr->prop ? pr->prop->name : NULL); - } -#endif rc = blocking_notifier_call_chain(&of_reconfig_chain, action, p); return notifier_to_errno(rc); } @@ -504,30 +498,6 @@ static void __of_changeset_entry_destroy(struct of_changeset_entry *ce) kfree(ce); } -#ifdef DEBUG -static void __of_changeset_entry_dump(struct of_changeset_entry *ce) -{ - switch (ce->action) { - case OF_RECONFIG_ADD_PROPERTY: - case OF_RECONFIG_REMOVE_PROPERTY: - case OF_RECONFIG_UPDATE_PROPERTY: - pr_debug("cset<%p> %-15s %pOF/%s\n", ce, action_names[ce->action], - ce->np, ce->prop->name); - break; - case OF_RECONFIG_ATTACH_NODE: - case OF_RECONFIG_DETACH_NODE: - pr_debug("cset<%p> %-15s %pOF\n", ce, action_names[ce->action], - ce->np); - break; - } -} -#else -static inline void __of_changeset_entry_dump(struct of_changeset_entry *ce) -{ - /* empty */ -} -#endif - static void __of_changeset_entry_invert(struct of_changeset_entry *ce, struct of_changeset_entry *rce) { @@ -599,7 +569,8 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) unsigned long flags; int ret = 0; - __of_changeset_entry_dump(ce); + if (pr_debug("changeset: applying: cset<%p> ", ce)) + of_changeset_action_print(ce->action, ce->np, ce->prop ? ce->prop->name : NULL); raw_spin_lock_irqsave(&devtree_lock, flags); switch (ce->action) { @@ -620,21 +591,9 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) } ret = __of_add_property(ce->np, ce->prop); - if (ret) { - pr_err("changeset: add_property failed @%pOF/%s\n", - ce->np, - ce->prop->name); - break; - } break; case OF_RECONFIG_REMOVE_PROPERTY: ret = __of_remove_property(ce->np, ce->prop); - if (ret) { - pr_err("changeset: remove_property failed @%pOF/%s\n", - ce->np, - ce->prop->name); - break; - } break; case OF_RECONFIG_UPDATE_PROPERTY: @@ -648,20 +607,17 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) } ret = __of_update_property(ce->np, ce->prop, &old_prop); - if (ret) { - pr_err("changeset: update_property failed @%pOF/%s\n", - ce->np, - ce->prop->name); - break; - } break; default: ret = -EINVAL; } raw_spin_unlock_irqrestore(&devtree_lock, flags); - if (ret) + if (ret) { + pr_err("changeset: apply failed: cset<%p> ", ce); + of_changeset_action_print(ce->action, ce->np, ce->prop ? ce->prop->name : NULL); return ret; + } switch (ce->action) { case OF_RECONFIG_ATTACH_NODE: From patchwork Tue Aug 1 21:54:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Herring X-Patchwork-Id: 129511 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f41:0:b0:3e4:2afc:c1 with SMTP id v1csp51295vqx; Tue, 1 Aug 2023 15:27:10 -0700 (PDT) X-Google-Smtp-Source: APBJJlFFHxsugc4wSSRQKsdxrz5Hknn/JA3B8dsTatrScroP1meEWj4hmHXn3UjpMpwOuaj553Fi X-Received: by 2002:a17:906:32c3:b0:992:b3a3:81f9 with SMTP id k3-20020a17090632c300b00992b3a381f9mr3315563ejk.71.1690928830217; Tue, 01 Aug 2023 15:27:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690928830; cv=none; d=google.com; s=arc-20160816; b=zrFrGgN5+1nUaFqodnDdZtxsrQNOr21iXNIzq8g1fHSki8Lo/Jwup33pteabQcaQpv gMgmnr6PM8OWava7e+//lpfZAZLce4SrbhU0OT0ouRyCOs5xOe/VKLrVqJ3RGnC/MyYA v9mu/Rh3Z3UlTcoYAQnHUvo2Jrk1f4U0Bh7iwz6rjiZhlnKWTnE9oFgSL0a6bBlHmJ29 fYZPiamTz3t3QBL4ME8IR3TCbJriHZmCyxbX0rpKxSUoGAJ1LIgrkeMYpm9L8UZQ12H+ t8r6ucnVViLpLffwIWru5H6v6pQKuhlHnKqt18+B8xdHQ4gz1JMs5aQKGeeycSaGfRU0 Qg+A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=/zT9NJtP+J7pPgHqOoouS8K6xGrtJRtOdBih1qtcTxM=; fh=9muYjwzOjeujIiOiqgEm7G2SJDFzcm638Q1NXjJ2Sec=; b=wjIuBmVDNhuD3/BsaAtRc8RmdRl8euWU8c9G1Gj7V1NyDWPJQfZ1u8UQkJ4suBYXIm VjxBfng5lAr2Zp7Z5LHLeW5L5lJO/8NkG1UW+d+eCaG1SDOJkPAOWlRJM8ZqYm+qv9w5 SdLo/qkJCrkcHJfffMvWCjOz88JbGKqie5ti/BEQma02+XhBk5WLWg9IzhH39eUQORmO vxJRX7+gXkWYCSU0OFY0ApCMXJ8KnsyA9Llyjejz8dgoafcLswiqkth5ocUEwHAAN0z+ m8lXt9ge1ttpB4or7EiHOef2xN5Qatzcdke6gOPe3ECXcgyYLqNXUKqu0MPRH0gwNu4w 72XQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=WRQx49Oe; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. 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Wysocki" , Sakari Ailus , Petr Mladek , Andy Shevchenko , Geert Uytterhoeven Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773067388837134751 X-GMAIL-MSGID: 1773067388837134751 __of_update_property() returns the existing property if there is one, but that value is never added to the changeset. Updates work because the existing property is also retrieved in of_changeset_action(), but that is racy as of_changeset_action() doesn't hold any locks. The property could be changed before the changeset is applied. Signed-off-by: Rob Herring --- drivers/of/dynamic.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index aa3821836937..31603b5a4ffc 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -565,7 +565,7 @@ static int __of_changeset_entry_notify(struct of_changeset_entry *ce, static int __of_changeset_entry_apply(struct of_changeset_entry *ce) { - struct property *old_prop, **propp; + struct property **propp; unsigned long flags; int ret = 0; @@ -606,7 +606,7 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) } } - ret = __of_update_property(ce->np, ce->prop, &old_prop); + ret = __of_update_property(ce->np, ce->prop, &ce->old_prop); break; default: ret = -EINVAL; @@ -908,9 +908,6 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action, ce->np = of_node_get(np); ce->prop = prop; - if (action == OF_RECONFIG_UPDATE_PROPERTY && prop) - ce->old_prop = of_find_property(np, prop->name, NULL); - /* add it to the list */ list_add_tail(&ce->node, &ocs->entries); return 0; From patchwork Tue Aug 1 21:54:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Herring X-Patchwork-Id: 129517 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f41:0:b0:3e4:2afc:c1 with SMTP id v1csp56304vqx; Tue, 1 Aug 2023 15:38:05 -0700 (PDT) X-Google-Smtp-Source: APBJJlGN4guP6bpn0gpyKk8ZtRz2GyvvJDGE7kkooy3XqSJ6xl5N8V1k7ct6TcpG8ae2RsnGdkl6 X-Received: by 2002:a17:907:2cc1:b0:99b:ead0:2733 with SMTP id hg1-20020a1709072cc100b0099bead02733mr3254145ejc.72.1690929485008; Tue, 01 Aug 2023 15:38:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690929484; cv=none; d=google.com; s=arc-20160816; b=sSBRptUTojYkj8veTDhcFlnNKYNUpbxFr4YSwEJC5Aoz6tfK1JvZrhgjpd6mhD2yWS 6hZan0sq8Vkr2uyAS/Fl5z3I7cB9OXuZhDohsNLDy3nBGYqA8ogH/AKmqcjDfH82NQIZ /z46DnjEX/RoASfXhZzhkaPUAWMteLlq6B/iWoEP4DvZL37VLC2/9BIss5Au9uwclxuB zUAasfMxiYeyicZP9xQGeHKY/voyj9mYNvdj1Tdo04N3WQKxXk131SWntLRCH13SCWRX 6bCYzbpenFOKca7Le/YQpoEISqaXuw27yNvZtemAYBAxWmMbv7aesnE8J1paG8p5CWYX XksA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=wIzW6kt+Fnq1RKPjcOX+W8gThJdrKIQ/bO0JbL7uGCw=; fh=9muYjwzOjeujIiOiqgEm7G2SJDFzcm638Q1NXjJ2Sec=; b=AhCoszCXzzMbWuLUUuPfpKdkSpHs4GXV1qj8/YBcIPbq4lbo6ogFjs66JZ58lNv0O5 Lxw9VxUlyTSd1fukAYkdW06kYRSUE2+litxromvCe4hCf30g2Q45MSF4GYAJ/Pny+haK hdzoy+zJlOUeWZgF8ffc3J0Dh4SCBqIbsN3a52Zh4N4rrE2arfqn8BEll4ktc5iIfRzl rg4ZRATdAS8TXYOXzFKcpZ2An+IREs5zw1n8mrJQytqsqFbuvO/KOgpRT4VFyDiztYKo 3nZ6Sh0jPL8/xeLVJEqLadnocUk0eb+v5ukK7vjL95AZN16FgLxowswbeNun9IpKhYlZ yP0Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=AkuLzquP; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t19-20020a1709067c1300b00977e0bdac8asi5309545ejo.583.2023.08.01.15.37.40; Tue, 01 Aug 2023 15:38:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=AkuLzquP; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232779AbjHAVzg (ORCPT + 99 others); Tue, 1 Aug 2023 17:55:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232762AbjHAVz0 (ORCPT ); Tue, 1 Aug 2023 17:55:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A7A31268C; Tue, 1 Aug 2023 14:55:24 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1FF1A61717; Tue, 1 Aug 2023 21:55:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB8C2C433C8; Tue, 1 Aug 2023 21:55:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690926923; bh=j035GzdMWI78hJ6xt3QYyUQ7BSA2USCCzXpQCLzuaQQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=AkuLzquPcKwKmyHz45oa81zSrNbECRKfvP510Ls5d6u95yQthyCw0+nJy4U+HnG0Q fx4TMGZSuMERk+kjrqYF3AxEmrFYD+znh+S6J0TkhfV8VE94pMCL7Lj0XQ5CHQckiB h4s0pjmx9Z/45Ui3QnKUrMG5l+BQSWLlO3AoPaXrjEmOEfavHiDxcOSdNAQ8vmL+3C WtLkbtWnJkErhCS6x/Z6PijlJQxJ58892rEB7EbA3RA8DocX022M31CUTHSjea5xhm /7h6N3w2M+EBg8Y/idCmfZ6wHQPyH+bqq4RVfyVhnUGvYi6MM41RfbURq5SoQxNg4v RrM+bIpWqdQig== Received: (nullmailer pid 2469343 invoked by uid 1000); Tue, 01 Aug 2023 21:55:14 -0000 From: Rob Herring Date: Tue, 01 Aug 2023 15:54:47 -0600 Subject: [PATCH 4/5] of: dynamic: Move dead property list check into property add/update functions MIME-Version: 1.0 Message-Id: <20230801-dt-changeset-fixes-v1-4-b5203e3fc22f@kernel.org> References: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> In-Reply-To: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> To: Frank Rowand , "Enrico Weigelt, metux IT consult" , "Rafael J. Wysocki" , Sakari Ailus , Petr Mladek , Andy Shevchenko , Geert Uytterhoeven Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773068075743539221 X-GMAIL-MSGID: 1773068075743539221 The changeset code checks for a property in the deadprops list when adding/updating a property, but of_add_property() and of_update_property() do not. As the users of these functions are pretty simple, they have not hit this scenario or else the property lists would get corrupted. Signed-off-by: Rob Herring --- drivers/of/base.c | 17 +++++++++++++++++ drivers/of/dynamic.c | 19 ------------------- 2 files changed, 17 insertions(+), 19 deletions(-) diff --git a/drivers/of/base.c b/drivers/of/base.c index 166fb7d75337..99c07f3cbf10 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -1538,6 +1538,14 @@ int __of_add_property(struct device_node *np, struct property *prop) { struct property **next; + /* If the property is in deadprops then it must be removed */ + for (next = &np->deadprops; *next; next = &(*next)->next) { + if (*next == prop) { + *next = prop->next; + break; + } + } + prop->next = NULL; next = &np->properties; while (*next) { @@ -1640,6 +1648,15 @@ int __of_update_property(struct device_node *np, struct property *newprop, { struct property **next, *oldprop; + /* If the property is in deadprops then it must be removed */ + for (next = &np->deadprops; *next; next = &(*next)->next) { + if (*next == newprop) { + *next = newprop->next; + newprop->next = NULL; + break; + } + } + for (next = &np->properties; *next; next = &(*next)->next) { if (of_prop_cmp((*next)->name, newprop->name) == 0) break; diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 31603b5a4ffc..4fd3699691b6 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -565,7 +565,6 @@ static int __of_changeset_entry_notify(struct of_changeset_entry *ce, static int __of_changeset_entry_apply(struct of_changeset_entry *ce) { - struct property **propp; unsigned long flags; int ret = 0; @@ -581,15 +580,6 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) __of_detach_node(ce->np); break; case OF_RECONFIG_ADD_PROPERTY: - /* If the property is in deadprops then it must be removed */ - for (propp = &ce->np->deadprops; *propp; propp = &(*propp)->next) { - if (*propp == ce->prop) { - *propp = ce->prop->next; - ce->prop->next = NULL; - break; - } - } - ret = __of_add_property(ce->np, ce->prop); break; case OF_RECONFIG_REMOVE_PROPERTY: @@ -597,15 +587,6 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) break; case OF_RECONFIG_UPDATE_PROPERTY: - /* If the property is in deadprops then it must be removed */ - for (propp = &ce->np->deadprops; *propp; propp = &(*propp)->next) { - if (*propp == ce->prop) { - *propp = ce->prop->next; - ce->prop->next = NULL; - break; - } - } - ret = __of_update_property(ce->np, ce->prop, &ce->old_prop); break; default: From patchwork Tue Aug 1 21:54:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Herring X-Patchwork-Id: 129503 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f41:0:b0:3e4:2afc:c1 with SMTP id v1csp45850vqx; Tue, 1 Aug 2023 15:16:00 -0700 (PDT) X-Google-Smtp-Source: APBJJlGocDA0P2Fi7jhKYOKO7jVeiwc9wItSMJ1ePb2WmJnR4A0+Ua6+js0LuAzREibn1Nfn4RZz X-Received: by 2002:a17:902:cec6:b0:1bb:c224:908b with SMTP id d6-20020a170902cec600b001bbc224908bmr14225278plg.61.1690928159653; Tue, 01 Aug 2023 15:15:59 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690928159; cv=none; d=google.com; s=arc-20160816; b=eF8q8hOLyfLQRkotly05jN+b/S1lZylmzghoKqe6PkPXlAJz6ZRBlG98UoZMhTNd5C +tMu+33KM9bArXhr/A0YDYBEriI2S5XapS/J1ZDriXAzdk8uAtYfWkjN+0GEzRsUchD9 VFsfyvR4st9H5HiD7/q1FCIK/aTUCmo5gCcaxNSZkDYCvpHAab+AJRA6rYHYVpqE7aza jwGCQBr4CkM0GAs9QHBcUzQrfFvo7EZHTaG7lttAmi4XT2IFzOtbWKC0oov8JGR3I/Kw ICmD+PUs7tBM5JkuP127mcBmN/6dInvz0vqX4EBaCXWrNiVY6r/s3A+NWBgPtIMFSvTZ AdqQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=2cfkcfxnEBWy60efQ4CVQ9rwk+mTUFxbAcSaEZRqaws=; fh=9muYjwzOjeujIiOiqgEm7G2SJDFzcm638Q1NXjJ2Sec=; b=Jv181Yqbh1PZZ+FbmVvTBUbRRuKyaxfxXdG5J3irzqHsDOesaWT/S5KDrMIV9uU66g bspT+XVbYt2CxX/x3w9Ys0yxy7zExySc7vvDYIK5WHU7ArNbSx2mDs+n4WLldLX/DI3a DJaSywbonExULAotxUd0XlqQCo3HHe6ZxoUz2R+otKOw0cA8GletGiNv9no+1h3qTdzi gf1/z195JiNa+OWbOvpFKCpVNIZHTaya6r5is2/MfRrVs2rjb3SdfsTE6WRYuJWCRecP WyUdfwTUvRd+ab469Vhc3DLyMoSgmeLFFntv+nMIWRrpcv2uLJI1C+1PPi93CHSJM07q lElw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b="X7bRXlm/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id q7-20020a170902a3c700b001bb162e944dsi66479plb.51.2023.08.01.15.15.46; Tue, 01 Aug 2023 15:15:59 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b="X7bRXlm/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232847AbjHAVzp (ORCPT + 99 others); Tue, 1 Aug 2023 17:55:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231269AbjHAVza (ORCPT ); Tue, 1 Aug 2023 17:55:30 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 008B326A3; Tue, 1 Aug 2023 14:55:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 03A5C61735; Tue, 1 Aug 2023 21:55:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF998C433C9; Tue, 1 Aug 2023 21:55:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690926925; bh=UWkbtTwArpfxA+PVVNq82HZpmdGnmNashPrlejXB09k=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=X7bRXlm/M/np1MHpLVS4xJ8NWtnSZ1zJMJUGU6InEuIVydMCltMRWhqg40qL2vZ8x tIxthPtUvRMG5TcGyrcJIKIurni4ZTrTX1I4XftP/uDxf5P83kRQ4dKyTAtIcwiCX8 TSpPi9V3rNAE7cjy9THYUUts0CAN+igAC8Vi5LasuaXVcEpbQAgSoMHPQQ/LwyYtJn HUJUVa7CbMjpRatKFh8vsV9pcuP0ZwqbnYCvHt2tpof25Hh2samO9RiEPLVfU74GA1 9ixnza/pJAaJ5wk0tK1YG4qU008sUroHYkjoffXYCk+spnxnatcDHaGv9Su4gsUX9P k5gieFs26hIOA== Received: (nullmailer pid 2469345 invoked by uid 1000); Tue, 01 Aug 2023 21:55:14 -0000 From: Rob Herring Date: Tue, 01 Aug 2023 15:54:48 -0600 Subject: [PATCH 5/5] of: Refactor node and property manipulation function locking MIME-Version: 1.0 Message-Id: <20230801-dt-changeset-fixes-v1-5-b5203e3fc22f@kernel.org> References: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> In-Reply-To: <20230801-dt-changeset-fixes-v1-0-b5203e3fc22f@kernel.org> To: Frank Rowand , "Enrico Weigelt, metux IT consult" , "Rafael J. Wysocki" , Sakari Ailus , Petr Mladek , Andy Shevchenko , Geert Uytterhoeven Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773066685615981817 X-GMAIL-MSGID: 1773066685615981817 All callers of __of_{add,remove,update}_property() and __of_{attach,detach}_node() wrap the call with the devtree_lock spinlock. Let's move the spinlock into the functions. This allows moving the sysfs update functions into those functions as well. Signed-off-by: Rob Herring --- drivers/of/base.c | 69 ++++++++++++++++++++++++++-------------------------- drivers/of/dynamic.c | 51 ++++++++++++-------------------------- 2 files changed, 50 insertions(+), 70 deletions(-) diff --git a/drivers/of/base.c b/drivers/of/base.c index 99c07f3cbf10..4ee050ace11e 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -1536,8 +1536,12 @@ EXPORT_SYMBOL(of_count_phandle_with_args); */ int __of_add_property(struct device_node *np, struct property *prop) { + int rc = 0; + unsigned long flags; struct property **next; + raw_spin_lock_irqsave(&devtree_lock, flags); + /* If the property is in deadprops then it must be removed */ for (next = &np->deadprops; *next; next = &(*next)->next) { if (*next == prop) { @@ -1549,15 +1553,21 @@ int __of_add_property(struct device_node *np, struct property *prop) prop->next = NULL; next = &np->properties; while (*next) { - if (strcmp(prop->name, (*next)->name) == 0) + if (strcmp(prop->name, (*next)->name) == 0) { /* duplicate ! don't insert it */ - return -EEXIST; - + rc = -EEXIST; + goto out; + } next = &(*next)->next; } *next = prop; - return 0; +out: + raw_spin_unlock_irqrestore(&devtree_lock, flags); + if (!rc) + __of_add_property_sysfs(np, prop); + + return rc; } /** @@ -1567,23 +1577,12 @@ int __of_add_property(struct device_node *np, struct property *prop) */ int of_add_property(struct device_node *np, struct property *prop) { - unsigned long flags; int rc; mutex_lock(&of_mutex); - - raw_spin_lock_irqsave(&devtree_lock, flags); rc = __of_add_property(np, prop); - raw_spin_unlock_irqrestore(&devtree_lock, flags); - - if (!rc) - __of_add_property_sysfs(np, prop); - mutex_unlock(&of_mutex); - if (!rc) - of_property_notify(OF_RECONFIG_ADD_PROPERTY, np, prop, NULL); - return rc; } EXPORT_SYMBOL_GPL(of_add_property); @@ -1591,20 +1590,29 @@ EXPORT_SYMBOL_GPL(of_add_property); int __of_remove_property(struct device_node *np, struct property *prop) { struct property **next; + unsigned long flags; + int rc = 0; + + raw_spin_lock_irqsave(&devtree_lock, flags); for (next = &np->properties; *next; next = &(*next)->next) { if (*next == prop) break; } - if (*next == NULL) - return -ENODEV; - + if (*next == NULL) { + rc = -ENODEV; + goto out; + } /* found the node */ *next = prop->next; prop->next = np->deadprops; np->deadprops = prop; - return 0; +out: + raw_spin_unlock_irqrestore(&devtree_lock, flags); + if (!rc) + __of_remove_property_sysfs(np, prop); + return rc; } /** @@ -1619,21 +1627,13 @@ int __of_remove_property(struct device_node *np, struct property *prop) */ int of_remove_property(struct device_node *np, struct property *prop) { - unsigned long flags; int rc; if (!prop) return -ENODEV; mutex_lock(&of_mutex); - - raw_spin_lock_irqsave(&devtree_lock, flags); rc = __of_remove_property(np, prop); - raw_spin_unlock_irqrestore(&devtree_lock, flags); - - if (!rc) - __of_remove_property_sysfs(np, prop); - mutex_unlock(&of_mutex); if (!rc) @@ -1647,6 +1647,9 @@ int __of_update_property(struct device_node *np, struct property *newprop, struct property **oldpropp) { struct property **next, *oldprop; + unsigned long flags; + + raw_spin_lock_irqsave(&devtree_lock, flags); /* If the property is in deadprops then it must be removed */ for (next = &np->deadprops; *next; next = &(*next)->next) { @@ -1675,6 +1678,10 @@ int __of_update_property(struct device_node *np, struct property *newprop, *next = newprop; } + raw_spin_unlock_irqrestore(&devtree_lock, flags); + + __of_update_property_sysfs(np, newprop, oldprop); + return 0; } @@ -1690,21 +1697,13 @@ int __of_update_property(struct device_node *np, struct property *newprop, int of_update_property(struct device_node *np, struct property *newprop) { struct property *oldprop; - unsigned long flags; int rc; if (!newprop->name) return -EINVAL; mutex_lock(&of_mutex); - - raw_spin_lock_irqsave(&devtree_lock, flags); rc = __of_update_property(np, newprop, &oldprop); - raw_spin_unlock_irqrestore(&devtree_lock, flags); - - if (!rc) - __of_update_property_sysfs(np, newprop, oldprop); - mutex_unlock(&of_mutex); if (!rc) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 4fd3699691b6..c59f581792f1 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -199,6 +199,9 @@ static void __of_attach_node(struct device_node *np) { const __be32 *phandle; int sz; + unsigned long flags; + + raw_spin_lock_irqsave(&devtree_lock, flags); if (!of_node_check_flag(np, OF_OVERLAY)) { np->name = __of_get_property(np, "name", NULL); @@ -221,6 +224,10 @@ static void __of_attach_node(struct device_node *np) np->parent->child = np; of_node_clear_flag(np, OF_DETACHED); np->fwnode.flags |= FWNODE_FLAG_NOT_DEVICE; + + raw_spin_unlock_irqrestore(&devtree_lock, flags); + + __of_attach_node_sysfs(np); } /** @@ -230,17 +237,12 @@ static void __of_attach_node(struct device_node *np) int of_attach_node(struct device_node *np) { struct of_reconfig_data rd; - unsigned long flags; memset(&rd, 0, sizeof(rd)); rd.dn = np; mutex_lock(&of_mutex); - raw_spin_lock_irqsave(&devtree_lock, flags); __of_attach_node(np); - raw_spin_unlock_irqrestore(&devtree_lock, flags); - - __of_attach_node_sysfs(np); mutex_unlock(&of_mutex); of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, &rd); @@ -251,13 +253,15 @@ int of_attach_node(struct device_node *np) void __of_detach_node(struct device_node *np) { struct device_node *parent; + unsigned long flags; - if (WARN_ON(of_node_check_flag(np, OF_DETACHED))) - return; + raw_spin_lock_irqsave(&devtree_lock, flags); parent = np->parent; - if (WARN_ON(!parent)) + if (WARN_ON(of_node_check_flag(np, OF_DETACHED) || !parent)) { + raw_spin_unlock_irqrestore(&devtree_lock, flags); return; + } if (parent->child == np) parent->child = np->sibling; @@ -274,6 +278,10 @@ void __of_detach_node(struct device_node *np) /* race with of_find_node_by_phandle() prevented by devtree_lock */ __of_phandle_cache_inv_entry(np->phandle); + + raw_spin_unlock_irqrestore(&devtree_lock, flags); + + __of_detach_node_sysfs(np); } /** @@ -283,17 +291,12 @@ void __of_detach_node(struct device_node *np) int of_detach_node(struct device_node *np) { struct of_reconfig_data rd; - unsigned long flags; memset(&rd, 0, sizeof(rd)); rd.dn = np; mutex_lock(&of_mutex); - raw_spin_lock_irqsave(&devtree_lock, flags); __of_detach_node(np); - raw_spin_unlock_irqrestore(&devtree_lock, flags); - - __of_detach_node_sysfs(np); mutex_unlock(&of_mutex); of_reconfig_notify(OF_RECONFIG_DETACH_NODE, &rd); @@ -565,13 +568,11 @@ static int __of_changeset_entry_notify(struct of_changeset_entry *ce, static int __of_changeset_entry_apply(struct of_changeset_entry *ce) { - unsigned long flags; int ret = 0; if (pr_debug("changeset: applying: cset<%p> ", ce)) of_changeset_action_print(ce->action, ce->np, ce->prop ? ce->prop->name : NULL); - raw_spin_lock_irqsave(&devtree_lock, flags); switch (ce->action) { case OF_RECONFIG_ATTACH_NODE: __of_attach_node(ce->np); @@ -592,7 +593,6 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) default: ret = -EINVAL; } - raw_spin_unlock_irqrestore(&devtree_lock, flags); if (ret) { pr_err("changeset: apply failed: cset<%p> ", ce); @@ -600,25 +600,6 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce) return ret; } - switch (ce->action) { - case OF_RECONFIG_ATTACH_NODE: - __of_attach_node_sysfs(ce->np); - break; - case OF_RECONFIG_DETACH_NODE: - __of_detach_node_sysfs(ce->np); - break; - case OF_RECONFIG_ADD_PROPERTY: - /* ignore duplicate names */ - __of_add_property_sysfs(ce->np, ce->prop); - break; - case OF_RECONFIG_REMOVE_PROPERTY: - __of_remove_property_sysfs(ce->np, ce->prop); - break; - case OF_RECONFIG_UPDATE_PROPERTY: - __of_update_property_sysfs(ce->np, ce->prop, ce->old_prop); - break; - } - return 0; }