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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 981AEC433EF for ; Fri, 13 May 2022 01:37:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 98D2110FA94; Fri, 13 May 2022 01:37:10 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7502410FA8C for ; Fri, 13 May 2022 01:37:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652405826; x=1683941826; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=42J121jJYe7URaZri0ucOrvJPDpAISejQVIChktn6Cs=; b=N3X/jIWxvyVwNAsVYadl9meOj5l5E06o8W3XZMGBBu2m9PfSCH0nXaSJ E2IkHTloeQW2MQVdVMYvBFaLefR39zcvuNj/sfWoWE0qbSCA9T+GPTiWd E296gujbQQ2GR213iaNa+jFslcx9Q7Dat1q80h/nwnghVlvYfNu+lVUUj oxLnqsE6CYp6lACaQF5cHTWlRy+9iGIE6J3qPoTXTkR7De751XsDqHo3p CRSZdqGRM5CaeBnFIv/8sEhN/7lg26TSceHlD9PE2JPVNdJMFOwOpt9AL g9TuZUwN15HEvu7dkpVJOlb0d4vQL2TWkj3g0WUCnwDdMUQxkkzcN9QqE Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10345"; a="257728762" X-IronPort-AV: E=Sophos;i="5.91,221,1647327600"; d="scan'208";a="257728762" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2022 18:37:05 -0700 X-IronPort-AV: E=Sophos;i="5.91,221,1647327600"; d="scan'208";a="671111025" Received: from orsosgc001.jf.intel.com ([10.165.21.154]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2022 18:37:05 -0700 From: Ashutosh Dixit To: intel-gfx@lists.freedesktop.org Date: Thu, 12 May 2022 18:36:59 -0700 Message-Id: <7043c1e165b4520ea7c5965a1c95dc8f0bed11d4.1652405421.git.ashutosh.dixit@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH 7/7] drm/i915/gt: Fix memory leaks in per-gt sysfs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" All kmalloc'd kobjects need a kobject_put() to free memory. For example in previous code, kobj_gt_release() never gets called. The requirement of kobject_put() now results in a slightly different code organization. v2: s/gtn/gt/ (Andi) Fixes: b770bcfae9ad ("drm/i915/gt: create per-tile sysfs interface") Signed-off-by: Ashutosh Dixit Reviewed-by: Andi Shyti Acked-by: Andrzej Hajda --- drivers/gpu/drm/i915/gt/intel_gt.c | 1 + drivers/gpu/drm/i915/gt/intel_gt_sysfs.c | 29 ++++++++++-------------- drivers/gpu/drm/i915/gt/intel_gt_sysfs.h | 6 +---- drivers/gpu/drm/i915/gt/intel_gt_types.h | 3 +++ drivers/gpu/drm/i915/i915_sysfs.c | 2 ++ 5 files changed, 19 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 034182f85501..0a3931c011c6 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -790,6 +790,7 @@ void intel_gt_driver_unregister(struct intel_gt *gt) { intel_wakeref_t wakeref; + intel_gt_sysfs_unregister(gt); intel_rps_driver_unregister(>->rps); intel_gsc_fini(>->gsc); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_sysfs.c b/drivers/gpu/drm/i915/gt/intel_gt_sysfs.c index 8ec8bc660c8c..9e4ebf53379b 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_sysfs.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_sysfs.c @@ -24,7 +24,7 @@ bool is_object_gt(struct kobject *kobj) static struct intel_gt *kobj_to_gt(struct kobject *kobj) { - return container_of(kobj, struct kobj_gt, base)->gt; + return container_of(kobj, struct intel_gt, sysfs_gt); } struct intel_gt *intel_gt_sysfs_get_drvdata(struct device *dev, @@ -72,9 +72,9 @@ static struct attribute *id_attrs[] = { }; ATTRIBUTE_GROUPS(id); +/* A kobject needs a release() method even if it does nothing */ static void kobj_gt_release(struct kobject *kobj) { - kfree(kobj); } static struct kobj_type kobj_gt_type = { @@ -85,8 +85,6 @@ static struct kobj_type kobj_gt_type = { void intel_gt_sysfs_register(struct intel_gt *gt) { - struct kobj_gt *kg; - /* * We need to make things right with the * ABI compatibility. The files were originally @@ -98,25 +96,22 @@ void intel_gt_sysfs_register(struct intel_gt *gt) if (gt_is_root(gt)) intel_gt_sysfs_pm_init(gt, gt_get_parent_obj(gt)); - kg = kzalloc(sizeof(*kg), GFP_KERNEL); - if (!kg) + /* init and xfer ownership to sysfs tree */ + if (kobject_init_and_add(>->sysfs_gt, &kobj_gt_type, + gt->i915->sysfs_gt, "gt%d", gt->info.id)) goto exit_fail; - kobject_init(&kg->base, &kobj_gt_type); - kg->gt = gt; - - /* xfer ownership to sysfs tree */ - if (kobject_add(&kg->base, gt->i915->sysfs_gt, "gt%d", gt->info.id)) - goto exit_kobj_put; - - intel_gt_sysfs_pm_init(gt, &kg->base); + intel_gt_sysfs_pm_init(gt, >->sysfs_gt); return; -exit_kobj_put: - kobject_put(&kg->base); - exit_fail: + kobject_put(>->sysfs_gt); drm_warn(>->i915->drm, "failed to initialize gt%d sysfs root\n", gt->info.id); } + +void intel_gt_sysfs_unregister(struct intel_gt *gt) +{ + kobject_put(>->sysfs_gt); +} diff --git a/drivers/gpu/drm/i915/gt/intel_gt_sysfs.h b/drivers/gpu/drm/i915/gt/intel_gt_sysfs.h index 9471b26752cf..a99aa7e8b01a 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_sysfs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_sysfs.h @@ -13,11 +13,6 @@ struct intel_gt; -struct kobj_gt { - struct kobject base; - struct intel_gt *gt; -}; - bool is_object_gt(struct kobject *kobj); struct drm_i915_private *kobj_to_i915(struct kobject *kobj); @@ -28,6 +23,7 @@ intel_gt_create_kobj(struct intel_gt *gt, const char *name); void intel_gt_sysfs_register(struct intel_gt *gt); +void intel_gt_sysfs_unregister(struct intel_gt *gt); struct intel_gt *intel_gt_sysfs_get_drvdata(struct device *dev, const char *name); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h index 097e10291f2d..993f003dad1d 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h @@ -225,6 +225,9 @@ struct intel_gt { } mocs; struct intel_pxp pxp; + + /* gt/gtN sysfs */ + struct kobject sysfs_gt; }; enum intel_gt_scratch_field { diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index 8521daba212a..3f06106cdcf5 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -259,4 +259,6 @@ void i915_teardown_sysfs(struct drm_i915_private *dev_priv) device_remove_bin_file(kdev, &dpf_attrs_1); device_remove_bin_file(kdev, &dpf_attrs); + + kobject_put(dev_priv->sysfs_gt); } -- 2.34.1