From nobody Tue Apr 28 15:47:01 2026 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 B1C33C433F5 for ; Wed, 1 Jun 2022 08:20:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350637AbiFAITy (ORCPT ); Wed, 1 Jun 2022 04:19:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350704AbiFAITh (ORCPT ); Wed, 1 Jun 2022 04:19:37 -0400 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::221]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A09E38FFBE; Wed, 1 Jun 2022 01:19:34 -0700 (PDT) Received: (Authenticated sender: clement.leger@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 97F79240009; Wed, 1 Jun 2022 08:19:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1654071573; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gPI47XC9OtqT4bQ9DbJLoCocyaCj0Ouilt5roec+84k=; b=o6iTqo28Xqs6KtnHgCDjk5nBtVxArCq9giMQSB+f+HdYoa9gm/3y5cd6Kd4j0YAYwJs9KE jOK8bn07Z2l4TLjAvJdwbkf9RtN8ETVakOQm6rqBsC6RiFlT1cacBoOfrg1KzOWGB2m8z9 UqvRV7Ewn6ffhzoAjEKlKbjZ/WTKZypZZldTIbTzTrgEF1Hdvnd+2OHEhuoGXycDR1YRJ0 6yFGcd80dFg+guNHLh1+8fqowPuuzX2G5N9rnDHmA+QhxnjpqYTtY/2TP2W1g5Pz1md677 4oe/4/Zg+QPXSHnKJbxfQG6XZN7FogKxvbUyxT9iV4OrQaCIYmnVg+7sjlwQSw== From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rob Herring , Frank Rowand , Nathan Lynch , Laurent Dufour , Daniel Henrique Barboza , David Gibson , Andrew Morton , David Hildenbrand , Ohhoon Kwon , "Aneesh Kumar K.V" , YueHaibing Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Allan Nielsen , Horatiu Vultur , Steen Hegelund , Thomas Petazzoni , Bjorn Helgaas , Lizhi Hou Subject: [PATCH v2 1/4] of: constify of_property_check_flags() prop argument Date: Wed, 1 Jun 2022 10:17:58 +0200 Message-Id: <20220601081801.348571-2-clement.leger@bootlin.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220601081801.348571-1-clement.leger@bootlin.com> References: <20220601081801.348571-1-clement.leger@bootlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This argument is not modified and thus can be set as const. Signed-off-by: Cl=C3=A9ment L=C3=A9ger --- include/linux/of.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/include/linux/of.h b/include/linux/of.h index f0a5d6b10c5a..d74fd82a6963 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -207,7 +207,7 @@ static inline void of_node_clear_flag(struct device_nod= e *n, unsigned long flag) } =20 #if defined(CONFIG_OF_DYNAMIC) || defined(CONFIG_SPARC) -static inline int of_property_check_flag(struct property *p, unsigned long= flag) +static inline int of_property_check_flag(const struct property *p, unsigne= d long flag) { return test_bit(flag, &p->_flags); } @@ -814,7 +814,8 @@ static inline void of_node_clear_flag(struct device_nod= e *n, unsigned long flag) { } =20 -static inline int of_property_check_flag(struct property *p, unsigned long= flag) +static inline int of_property_check_flag(const struct property *p, + unsigned long flag) { return 0; } --=20 2.36.0 From nobody Tue Apr 28 15:47:01 2026 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 88A84C433EF for ; Wed, 1 Jun 2022 08:20:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350715AbiFAIUK (ORCPT ); Wed, 1 Jun 2022 04:20:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59422 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350609AbiFAITj (ORCPT ); Wed, 1 Jun 2022 04:19:39 -0400 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [217.70.183.193]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C43068B09F; Wed, 1 Jun 2022 01:19:37 -0700 (PDT) Received: (Authenticated sender: clement.leger@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 8D20D240002; Wed, 1 Jun 2022 08:19:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1654071575; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=66sbXOqLZPVknEYGXiL+IiJFbzYM0L821ycNXoLDan0=; b=Dty1dson65ZwfKu28f1/gNdvVy0KqeNkZm1Fw+s7V+a07jxBAsrp5sg2/JtSKYJnYQHldm BB04Iwjv8Gb9cSMgCv3fxJhnCOQmSDRew0uDeEgZgv9CzBY9WY6n4sYkjZ5JsT7GU2zZTi 4QAUy1oieKPTA/1j1jsIe8/iR7PQVmiB6OqyKgtxRsbThlaZy5qHFh5VbCwR6GyAHdIcVU zAZK2a5h6RpFxPsfbVZtcwleCvbpzTJKnv8jd8dFmtyo+yfP/ZNpk8TTlS/bD8YYeb614Z y5fRHoNjqGGq/f97eqN8HjWEsZxugFxefWGva/fbfpM7zKK3L0U/6tnpHdVzsg== From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rob Herring , Frank Rowand , Nathan Lynch , Laurent Dufour , Daniel Henrique Barboza , David Gibson , Andrew Morton , David Hildenbrand , Ohhoon Kwon , "Aneesh Kumar K.V" , YueHaibing Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Allan Nielsen , Horatiu Vultur , Steen Hegelund , Thomas Petazzoni , Bjorn Helgaas , Lizhi Hou Subject: [PATCH v2 2/4] of: dynamic: add of_property_alloc() and of_property_free() Date: Wed, 1 Jun 2022 10:17:59 +0200 Message-Id: <20220601081801.348571-3-clement.leger@bootlin.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220601081801.348571-1-clement.leger@bootlin.com> References: <20220601081801.348571-1-clement.leger@bootlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add function which allows to dynamically allocate and free properties. Use this function internally for all code that used the same logic (mainly __of_prop_dup()). Signed-off-by: Cl=C3=A9ment L=C3=A9ger --- drivers/of/dynamic.c | 82 ++++++++++++++++++++++++----------------- drivers/of/of_private.h | 21 ++++++++++- include/linux/of.h | 14 +++++++ 3 files changed, 82 insertions(+), 35 deletions(-) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index cd3821a6444f..c0dcbea31d28 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -313,9 +313,7 @@ static void property_list_free(struct property *prop_li= st) =20 for (prop =3D prop_list; prop !=3D NULL; prop =3D next) { next =3D prop->next; - kfree(prop->name); - kfree(prop->value); - kfree(prop); + of_property_free(prop); } } =20 @@ -367,48 +365,66 @@ void of_node_release(struct kobject *kobj) } =20 /** - * __of_prop_dup - Copy a property dynamically. - * @prop: Property to copy + * of_property_free - Free a property allocated dynamically. + * @prop: Property to be freed + */ +void of_property_free(const struct property *prop) +{ + if (!of_property_check_flag(prop, OF_DYNAMIC)) + return; + + if (prop->value !=3D prop + 1) + kfree(prop->value); + + kfree(prop->name); + kfree(prop); +} +EXPORT_SYMBOL(of_property_free); + +/** + * of_property_alloc - Allocate a property dynamically. + * @name: Name of the new property + * @value: Value that will be copied into the new property value or NULL + * if only @len allocation is needed. + * @len: Length of new property value and if @value is provided, the + * length of the value to be copied * @allocflags: Allocation flags (typically pass GFP_KERNEL) * - * Copy a property by dynamically allocating the memory of both the + * Create a property by dynamically allocating the memory of both the * property structure and the property name & contents. The property's * flags have the OF_DYNAMIC bit set so that we can differentiate between * dynamically allocated properties and not. * * Return: The newly allocated property or NULL on out of memory error. */ -struct property *__of_prop_dup(const struct property *prop, gfp_t allocfla= gs) +struct property *of_property_alloc(const char *name, const void *value, + size_t len, gfp_t allocflags) { - struct property *new; + struct property *prop; =20 - new =3D kzalloc(sizeof(*new), allocflags); - if (!new) + prop =3D kzalloc(sizeof(*prop) + len, allocflags); + if (!prop) return NULL; =20 - /* - * NOTE: There is no check for zero length value. - * In case of a boolean property, this will allocate a value - * of zero bytes. We do this to work around the use - * of of_get_property() calls on boolean values. - */ - new->name =3D kstrdup(prop->name, allocflags); - new->value =3D kmemdup(prop->value, prop->length, allocflags); - new->length =3D prop->length; - if (!new->name || !new->value) - goto err_free; - - /* mark the property as dynamic */ - of_property_set_flag(new, OF_DYNAMIC); - - return new; - - err_free: - kfree(new->name); - kfree(new->value); - kfree(new); + prop->name =3D kstrdup(name, allocflags); + if (!prop->name) + goto out_err; + + prop->value =3D prop + 1; + if (value) + memcpy(prop->value, value, len); + + prop->length =3D len; + of_property_set_flag(prop, OF_DYNAMIC); + + return prop; + +out_err: + of_property_free(prop); + return NULL; } +EXPORT_SYMBOL(of_property_alloc); =20 /** * __of_node_dup() - Duplicate or create an empty device node dynamically. @@ -447,9 +463,7 @@ struct device_node *__of_node_dup(const struct device_n= ode *np, if (!new_pp) goto err_prop; if (__of_add_property(node, new_pp)) { - kfree(new_pp->name); - kfree(new_pp->value); - kfree(new_pp); + of_property_free(new_pp); goto err_prop; } } diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index 9324483397f6..1d6459bf705d 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -115,7 +115,26 @@ extern void *__unflatten_device_tree(const void *blob, * without taking node references, so you either have to * own the devtree lock or work on detached trees only. */ -struct property *__of_prop_dup(const struct property *prop, gfp_t allocfla= gs); + +/** + * __of_prop_dup - Copy a property dynamically. + * @prop: Property to copy + * @allocflags: Allocation flags (typically pass GFP_KERNEL) + * + * Copy a property by dynamically allocating the memory of both the + * property structure and the property name & contents. The property's + * flags have the OF_DYNAMIC bit set so that we can differentiate between + * dynamically allocated properties and not. + * + * Return: The newly allocated property or NULL on out of memory error. + */ +static inline +struct property *__of_prop_dup(const struct property *prop, gfp_t allocfla= gs) +{ + return of_property_alloc(prop->name, prop->value, prop->length, + allocflags); +} + struct device_node *__of_node_dup(const struct device_node *np, const char *full_name); =20 diff --git a/include/linux/of.h b/include/linux/of.h index d74fd82a6963..f1966f3c3847 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1464,6 +1464,10 @@ enum of_reconfig_change { }; =20 #ifdef CONFIG_OF_DYNAMIC +struct property *of_property_alloc(const char *name, const void *value, + size_t len, gfp_t allocflags); +void of_property_free(const struct property *prop); + extern int of_reconfig_notifier_register(struct notifier_block *); extern int of_reconfig_notifier_unregister(struct notifier_block *); extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd); @@ -1508,6 +1512,16 @@ static inline int of_changeset_update_property(struc= t of_changeset *ocs, return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); } #else /* CONFIG_OF_DYNAMIC */ + +static inline +struct property *of_property_alloc(const char *name, const void *value, + size_t len, gfp_t allocflags) +{ + return NULL; +} + +static inline void of_property_free(const struct property *prop) {} + static inline int of_reconfig_notifier_register(struct notifier_block *nb) { return -EINVAL; --=20 2.36.0 From nobody Tue Apr 28 15:47:01 2026 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 9DA17C433FE for ; Wed, 1 Jun 2022 08:20:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346425AbiFAIUh (ORCPT ); Wed, 1 Jun 2022 04:20:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238460AbiFAITo (ORCPT ); Wed, 1 Jun 2022 04:19:44 -0400 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [217.70.183.193]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D0578B0B8; Wed, 1 Jun 2022 01:19:41 -0700 (PDT) Received: (Authenticated sender: clement.leger@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id E3B93240007; Wed, 1 Jun 2022 08:19:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1654071580; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HRqlGkX4lNXh2KDOMp58fFR6Uy/8W1dnbyDrc2jNMi4=; b=kZgOKQ72E+iXFpdDtMXRTr9H0bGcL357K3vLgQ+GDK0M+xL+6PsphEGlP2mdO1UiYIlyvq zicqB6nybvvHAlmtM5LD15+iMQ6h+VpaokEu8JtmjPBWbE9JPjNUDv/1gta6qw5eiJiFpr 3LwloFBeY5wX8BrZ/1jOf0Woar/xig8AFIwpEMJpQ9TgKc0iigE5+TpSdlzvWaTG55b1+q trIOxLxW0wRlGH592zTOIpZf69SwVzP9oNbsCsSpGhdJi2DXABQ2BU4HF6Yv5vP/7OlIx7 D8GuXbmk9eOoyr2bzXNH2RzHZwm/WWQTQssToUNFSGwEueLZWZUOWeKg5WHI1g== From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rob Herring , Frank Rowand , Nathan Lynch , Laurent Dufour , Daniel Henrique Barboza , David Gibson , Andrew Morton , David Hildenbrand , Ohhoon Kwon , "Aneesh Kumar K.V" , YueHaibing Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Allan Nielsen , Horatiu Vultur , Steen Hegelund , Thomas Petazzoni , Bjorn Helgaas , Lizhi Hou Subject: [PATCH v2 3/4] of: dynamic: add of_node_alloc() Date: Wed, 1 Jun 2022 10:18:00 +0200 Message-Id: <20220601081801.348571-4-clement.leger@bootlin.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220601081801.348571-1-clement.leger@bootlin.com> References: <20220601081801.348571-1-clement.leger@bootlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add of_node_alloc() which allows to create nodes. The node full_name field is allocated as part of the node allocation and the kfree() for this field is checked at release time to allow users using their own allocated name. Signed-off-by: Cl=C3=A9ment L=C3=A9ger --- drivers/of/dynamic.c | 52 ++++++++++++++++++++++++++++++++++---------- include/linux/of.h | 6 +++++ 2 files changed, 47 insertions(+), 11 deletions(-) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index c0dcbea31d28..67636aafe810 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -359,7 +359,9 @@ void of_node_release(struct kobject *kobj) property_list_free(node->deadprops); fwnode_links_purge(of_fwnode_handle(node)); =20 - kfree(node->full_name); + if (node->full_name !=3D (const char *) (node + 1)) + kfree(node->full_name); + kfree(node->data); kfree(node); } @@ -426,6 +428,43 @@ struct property *of_property_alloc(const char *name, c= onst void *value, } EXPORT_SYMBOL(of_property_alloc); =20 +/** + * of_node_alloc - Allocate a node dynamically. + * @name: Node name + * @allocflags: Allocation flags (typically pass GFP_KERNEL) + * + * Create a node by dynamically allocating the memory of both the + * node structure and the node name & contents. The node's + * flags have the OF_DYNAMIC & OF_DETACHED bit set so that we can + * differentiate between dynamically allocated nodes and not. + * + * Return: The newly allocated node or NULL on out of memory error. + */ +struct device_node *of_node_alloc(const char *name, gfp_t allocflags) +{ + struct device_node *node; + int name_len =3D 0; + + if (name) + name_len =3D strlen(name) + 1; + + node =3D kzalloc(sizeof(*node) + name_len, allocflags); + if (!node) + return NULL; + + if (name) { + node->full_name =3D (const char *) (node + 1); + strcpy((char *)node->full_name, name); + } + + of_node_set_flag(node, OF_DYNAMIC); + of_node_set_flag(node, OF_DETACHED); + of_node_init(node); + + return node; +} +EXPORT_SYMBOL(of_node_alloc); + /** * __of_node_dup() - Duplicate or create an empty device node dynamically. * @np: if not NULL, contains properties to be duplicated in new node @@ -442,18 +481,9 @@ struct device_node *__of_node_dup(const struct device_= node *np, { struct device_node *node; =20 - node =3D kzalloc(sizeof(*node), GFP_KERNEL); + node =3D of_node_alloc(full_name, GFP_KERNEL); if (!node) return NULL; - node->full_name =3D kstrdup(full_name, GFP_KERNEL); - if (!node->full_name) { - kfree(node); - return NULL; - } - - of_node_set_flag(node, OF_DYNAMIC); - of_node_set_flag(node, OF_DETACHED); - of_node_init(node); =20 /* Iterate over and duplicate all properties */ if (np) { diff --git a/include/linux/of.h b/include/linux/of.h index f1966f3c3847..c18da685ade1 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1464,6 +1464,7 @@ enum of_reconfig_change { }; =20 #ifdef CONFIG_OF_DYNAMIC +struct device_node *of_node_alloc(const char *name, gfp_t allocflags); struct property *of_property_alloc(const char *name, const void *value, size_t len, gfp_t allocflags); void of_property_free(const struct property *prop); @@ -1512,6 +1513,11 @@ static inline int of_changeset_update_property(struc= t of_changeset *ocs, return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); } #else /* CONFIG_OF_DYNAMIC */ +static inline struct device_node *of_node_alloc(const char *name, + gfp_t allocflags) +{ + return NULL; +} =20 static inline struct property *of_property_alloc(const char *name, const void *value, --=20 2.36.0 From nobody Tue Apr 28 15:47:01 2026 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 DB31CC433F5 for ; Wed, 1 Jun 2022 08:20:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348654AbiFAIUn (ORCPT ); Wed, 1 Jun 2022 04:20:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350651AbiFAITs (ORCPT ); Wed, 1 Jun 2022 04:19:48 -0400 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::221]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 437B18B0B6; Wed, 1 Jun 2022 01:19:45 -0700 (PDT) Received: (Authenticated sender: clement.leger@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 6811C240003; Wed, 1 Jun 2022 08:19:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1654071584; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tB6r1mPxpov1adaPZ1h7raILSPvWQ3E2xUlUW/ShjM8=; b=RywiZGXMK2m3+oYhil8bcSVInVSjw/Ke0fHQpexcrcl/PAkbfle88RKr5oZsrQkfjIkR9N z7HK1FZGRaLI0pICBOqM4ngQ1XME6IrUC+z5x5oPDHWPh79VMRvUWt1dArspsdcZ1xQ2BU xPRJBV66cNxksVeDGS+F6FZt4cFw5w3IH+4L6yBBilJWe9jPXjF9ywhvp6N4CaNntvXfiH oKESBLi3Rw0m4JVCwiEtyNOSHiDXpQ3gwkhKK2fJ8fM0AY809WSNTDe4gR3V9IeJow2bPy 54ofwHQMkvWL59q+lszAVmjphaNTLOc41sS9QVoy/dXs7X/p/Htvej1stMV/dg== From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rob Herring , Frank Rowand , Nathan Lynch , Laurent Dufour , Daniel Henrique Barboza , David Gibson , Andrew Morton , David Hildenbrand , Ohhoon Kwon , "Aneesh Kumar K.V" , YueHaibing Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Allan Nielsen , Horatiu Vultur , Steen Hegelund , Thomas Petazzoni , Bjorn Helgaas , Lizhi Hou Subject: [PATCH v2 4/4] powerpc/pseries: use of_property_alloc/free() and of_node_alloc() Date: Wed, 1 Jun 2022 10:18:01 +0200 Message-Id: <20220601081801.348571-5-clement.leger@bootlin.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220601081801.348571-1-clement.leger@bootlin.com> References: <20220601081801.348571-1-clement.leger@bootlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use of_property_alloc/free() and of_node_alloc() to create and free device-tree nodes and properties. Signed-off-by: Cl=C3=A9ment L=C3=A9ger --- arch/powerpc/platforms/pseries/dlpar.c | 51 +++---------------- .../platforms/pseries/hotplug-memory.c | 21 +------- arch/powerpc/platforms/pseries/reconfig.c | 45 +++++----------- 3 files changed, 21 insertions(+), 96 deletions(-) diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platform= s/pseries/dlpar.c index 498d6efcb5ae..5a04566e98a4 100644 --- a/arch/powerpc/platforms/pseries/dlpar.c +++ b/arch/powerpc/platforms/pseries/dlpar.c @@ -38,61 +38,25 @@ struct cc_workarea { __be32 prop_offset; }; =20 -void dlpar_free_cc_property(struct property *prop) -{ - kfree(prop->name); - kfree(prop->value); - kfree(prop); -} - static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa) { - struct property *prop; - char *name; - char *value; - - prop =3D kzalloc(sizeof(*prop), GFP_KERNEL); - if (!prop) - return NULL; + int length; + char *name, *value; =20 name =3D (char *)ccwa + be32_to_cpu(ccwa->name_offset); - prop->name =3D kstrdup(name, GFP_KERNEL); - if (!prop->name) { - dlpar_free_cc_property(prop); - return NULL; - } - - prop->length =3D be32_to_cpu(ccwa->prop_length); + length =3D be32_to_cpu(ccwa->prop_length); value =3D (char *)ccwa + be32_to_cpu(ccwa->prop_offset); - prop->value =3D kmemdup(value, prop->length, GFP_KERNEL); - if (!prop->value) { - dlpar_free_cc_property(prop); - return NULL; - } =20 - return prop; + return of_property_alloc(name, value, length, GFP_KERNEL); } =20 static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa) { - struct device_node *dn; const char *name; =20 - dn =3D kzalloc(sizeof(*dn), GFP_KERNEL); - if (!dn) - return NULL; - name =3D (const char *)ccwa + be32_to_cpu(ccwa->name_offset); - dn->full_name =3D kstrdup(name, GFP_KERNEL); - if (!dn->full_name) { - kfree(dn); - return NULL; - } =20 - of_node_set_flag(dn, OF_DYNAMIC); - of_node_init(dn); - - return dn; + return of_node_alloc(name, GFP_KERNEL); } =20 static void dlpar_free_one_cc_node(struct device_node *dn) @@ -102,11 +66,10 @@ static void dlpar_free_one_cc_node(struct device_node = *dn) while (dn->properties) { prop =3D dn->properties; dn->properties =3D prop->next; - dlpar_free_cc_property(prop); + of_property_free(prop); } =20 - kfree(dn->full_name); - kfree(dn); + of_node_put(dn); } =20 void dlpar_free_cc_nodes(struct device_node *dn) diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc= /platforms/pseries/hotplug-memory.c index 2e3a317722a8..2ddf2a0ba048 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -69,33 +69,16 @@ unsigned long pseries_memory_block_size(void) return memblock_size; } =20 -static void dlpar_free_property(struct property *prop) -{ - kfree(prop->name); - kfree(prop->value); - kfree(prop); -} - static struct property *dlpar_clone_property(struct property *prop, u32 prop_size) { - struct property *new_prop; - - new_prop =3D kzalloc(sizeof(*new_prop), GFP_KERNEL); + struct property *new_prop =3D of_property_alloc(prop->name, NULL, + prop_size, GFP_KERNEL); if (!new_prop) return NULL; =20 - new_prop->name =3D kstrdup(prop->name, GFP_KERNEL); - new_prop->value =3D kzalloc(prop_size, GFP_KERNEL); - if (!new_prop->name || !new_prop->value) { - dlpar_free_property(new_prop); - return NULL; - } - memcpy(new_prop->value, prop->value, prop->length); - new_prop->length =3D prop_size; =20 - of_property_set_flag(new_prop, OF_DYNAMIC); return new_prop; } =20 diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platf= orms/pseries/reconfig.c index cad7a0c93117..f1a364995e82 100644 --- a/arch/powerpc/platforms/pseries/reconfig.c +++ b/arch/powerpc/platforms/pseries/reconfig.c @@ -24,17 +24,9 @@ static int pSeries_reconfig_add_node(const char *path, s= truct property *proplist struct device_node *np; int err =3D -ENOMEM; =20 - np =3D kzalloc(sizeof(*np), GFP_KERNEL); + np =3D of_node_alloc(kbasename(path), GFP_KERNEL); if (!np) - goto out_err; - - np->full_name =3D kstrdup(kbasename(path), GFP_KERNEL); - if (!np->full_name) - goto out_err; - - np->properties =3D proplist; - of_node_set_flag(np, OF_DYNAMIC); - of_node_init(np); + return -ENOMEM; =20 np->parent =3D pseries_of_derive_parent(path); if (IS_ERR(np->parent)) { @@ -55,8 +47,7 @@ static int pSeries_reconfig_add_node(const char *path, st= ruct property *proplist out_err: if (np) { of_node_put(np->parent); - kfree(np->full_name); - kfree(np); + of_node_put(np); } return err; } @@ -91,9 +82,7 @@ static void release_prop_list(const struct property *prop) struct property *next; for (; prop; prop =3D next) { next =3D prop->next; - kfree(prop->name); - kfree(prop->value); - kfree(prop); + of_property_free(prop); } =20 } @@ -167,27 +156,17 @@ static char * parse_next_property(char *buf, char *en= d, char **name, int *length static struct property *new_property(const char *name, const int length, const unsigned char *value, struct property *last) { - struct property *new =3D kzalloc(sizeof(*new), GFP_KERNEL); + struct property *prop; =20 - if (!new) + prop =3D of_property_alloc(name, NULL, length + 1, GFP_KERNEL); + if (!prop) return NULL; =20 - if (!(new->name =3D kstrdup(name, GFP_KERNEL))) - goto cleanup; - if (!(new->value =3D kmalloc(length + 1, GFP_KERNEL))) - goto cleanup; - - memcpy(new->value, value, length); - *(((char *)new->value) + length) =3D 0; - new->length =3D length; - new->next =3D last; - return new; - -cleanup: - kfree(new->name); - kfree(new->value); - kfree(new); - return NULL; + memcpy(prop->value, value, length); + *(((char *)prop->value) + length) =3D 0; + prop->next =3D last; + + return prop; } =20 static int do_add_node(char *buf, size_t bufsize) --=20 2.36.0