From patchwork Wed Nov 6 10:48:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Ceresoli X-Patchwork-Id: 13864361 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 2915DD44D48 for ; Wed, 6 Nov 2024 10:48:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1FB3210E6B7; Wed, 6 Nov 2024 10:48:47 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="Fl1PBQ8v"; dkim-atps=neutral Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7FF8B10E1D7 for ; Wed, 6 Nov 2024 10:48:45 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id B00336000E; Wed, 6 Nov 2024 10:48:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1730890124; 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=6pRM5jscZII9GohdxbWbdZ5ZoYRQpxbmot/dqfyy/mM=; b=Fl1PBQ8vf8xbrbvYM3xWTxSpEI3DdCvhNIBTbOYp6R+eDrsVaCDOKt0Jox0oPfimU1B9YA pHfLSpEqovaIxofsgJhE/kStmQesRRrZ0t/Pkptx6G3Uw4xLiTPe0CXzwD4C7H0dsR7/Y6 qi89zz5Y3iHIs+mDjaicJW1eeYQeGDzVj7hbBvDspF6VZg5nuR5TEksv97XYsCvG7n3yXd qTicJU3CcnPNi6EO8gP0kxj9vMtjnTdTJ/YtBcGqYe8jJTyMdO+/L/d71J8lmwKWod57eL ANYApORKl9n8h07Ab2yZpYzTsbZBgcDUvkwCqzdpiYbM9ClTo6iBsepwJHBi4Q== From: Luca Ceresoli Date: Wed, 06 Nov 2024 11:48:26 +0100 Subject: [PATCH v2 3/4] drm/mode_object: add drm_mode_object_read_refcount() MIME-Version: 1.0 Message-Id: <20241106-drm-small-improvements-v2-3-f6e2aef86719@bootlin.com> References: <20241106-drm-small-improvements-v2-0-f6e2aef86719@bootlin.com> In-Reply-To: <20241106-drm-small-improvements-v2-0-f6e2aef86719@bootlin.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Luca Ceresoli X-Mailer: b4 0.14.2 X-GND-Sasl: luca.ceresoli@bootlin.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a wrapper to kref_read() just like the ones already in place for kref_get() and kref_put(). This will be used for sanity checks on object lifetime. Signed-off-by: Luca Ceresoli --- drivers/gpu/drm/drm_mode_object.c | 20 ++++++++++++++++++++ include/drm/drm_mode_object.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c index df4cc0e8e263d5887a799cf1a61d998234be7158..f990cc7e9b5d3bda3453123593314fa1ea2bf923 100644 --- a/drivers/gpu/drm/drm_mode_object.c +++ b/drivers/gpu/drm/drm_mode_object.c @@ -217,6 +217,26 @@ void drm_mode_object_get(struct drm_mode_object *obj) } EXPORT_SYMBOL(drm_mode_object_get); +/** + * drm_mode_object_get - read the refcount for a mode object + * @obj: DRM mode object + * + * This function returns the current object's refcount if it is a + * refcounted modeset object, or 0 on any other object. + */ +unsigned int drm_mode_object_read_refcount(struct drm_mode_object *obj) +{ + unsigned int refcount = 0; + + if (obj->free_cb) { + refcount = kref_read(&obj->refcount); + DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, refcount); + } + + return refcount; +} +EXPORT_SYMBOL(drm_mode_object_read_refcount); + /** * drm_object_attach_property - attach a property to a modeset object * @obj: drm modeset object diff --git a/include/drm/drm_mode_object.h b/include/drm/drm_mode_object.h index c68edbd126d04d51221f50aa2b4166475543b59f..3d2c739e703888bf4520c61594d480f128d50e56 100644 --- a/include/drm/drm_mode_object.h +++ b/include/drm/drm_mode_object.h @@ -123,6 +123,7 @@ struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, uint32_t id, uint32_t type); void drm_mode_object_get(struct drm_mode_object *obj); void drm_mode_object_put(struct drm_mode_object *obj); +unsigned int drm_mode_object_read_refcount(struct drm_mode_object *obj); int drm_object_property_set_value(struct drm_mode_object *obj, struct drm_property *property,