From patchwork Mon Dec 11 08:16:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 13486792 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 B1B01C4167B for ; Mon, 11 Dec 2023 08:16:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DC50410E34E; Mon, 11 Dec 2023 08:16:34 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id DC18610E34E; Mon, 11 Dec 2023 08:16:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1702282592; x=1733818592; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Xg+HVN3fSrRheCt23nGT/P5SDYSEh+IgdP59kfa3FkM=; b=aw8JYBrjHYVyNtPk0vEpa93f/tVuW1+LOF8LRu6QRwnhY9jbbDFtub7q DxRVEj1xPCos5HSJLeyfcimaf9v41NDtrA9u3eGk264w/KAF0VZ5Mx5al XsLDb8f3Bj12mtHgqxVV4YhPEigVeytBtQ6dEXWRpwlWs1rFZIXPaGiYK OIIwLc6h2GM7Xz7MgIuRRPoyDdtfKeEtNCUDKVD68u3eJRUPeI5dGWLGt YfMirSHNFs3obU8cIKO7tJkSKPTcglmr2WyKzcDylDZtgMJLzXJ0ztSJz SNRF686r5MaberFa6BOLSEEbP2YmtdHZMcD3TL3P6c2QW+ullX/SEvDAc Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10920"; a="461088726" X-IronPort-AV: E=Sophos;i="6.04,267,1695711600"; d="scan'208";a="461088726" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Dec 2023 00:16:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10920"; a="766285634" X-IronPort-AV: E=Sophos;i="6.04,267,1695711600"; d="scan'208";a="766285634" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.74]) by orsmga007.jf.intel.com with SMTP; 11 Dec 2023 00:16:30 -0800 Received: by stinkbox (sSMTP sendmail emulation); Mon, 11 Dec 2023 10:16:29 +0200 From: Ville Syrjala To: dri-devel@lists.freedesktop.org Subject: [PATCH 2/2] drm: Warn when freeing a framebuffer that's still on a list Date: Mon, 11 Dec 2023 10:16:25 +0200 Message-ID: <20231211081625.25704-2-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231211081625.25704-1-ville.syrjala@linux.intel.com> References: <20231211081625.25704-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 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: , Cc: intel-gfx@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ville Syrjälä Sprinkle some extra WARNs around so that we might catch premature framebuffer destruction more readily. Signed-off-by: Ville Syrjälä Acked-by: Javier Martinez Canillas --- drivers/gpu/drm/drm_framebuffer.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c index 3cc0ffc28e86..888aadb6a4ac 100644 --- a/drivers/gpu/drm/drm_framebuffer.c +++ b/drivers/gpu/drm/drm_framebuffer.c @@ -461,6 +461,7 @@ int drm_mode_rmfb(struct drm_device *dev, u32 fb_id, INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); INIT_LIST_HEAD(&arg.fbs); + drm_WARN_ON(dev, !list_empty(&fb->filp_head)); list_add_tail(&fb->filp_head, &arg.fbs); schedule_work(&arg.work); @@ -827,6 +828,8 @@ void drm_framebuffer_free(struct kref *kref) container_of(kref, struct drm_framebuffer, base.refcount); struct drm_device *dev = fb->dev; + drm_WARN_ON(dev, !list_empty(&fb->filp_head)); + /* * The lookup idr holds a weak reference, which has not necessarily been * removed at this point. Check for that. @@ -1119,7 +1122,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb) dev = fb->dev; - WARN_ON(!list_empty(&fb->filp_head)); + drm_WARN_ON(dev, !list_empty(&fb->filp_head)); /* * drm ABI mandates that we remove any deleted framebuffers from active