From patchwork Thu Oct 31 12:11:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Carrasco X-Patchwork-Id: 13857837 Received: from mail-wr1-f48.google.com (mail-wr1-f48.google.com [209.85.221.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E65DD191F65; Thu, 31 Oct 2024 12:11:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730376696; cv=none; b=hMT+MQD1AWu+udl1VEH7LaG3wKeK2Heq0evlQfkSCSaL0XG+hxzEwrr+nMWFTCdxYbuXV++pHcNxoJ7Zy8WZsH11XWEx0BzkwfEY9JvEqbdJ/4Q0dB2Nc4ZAIQeL1tPUTukVC1ImsGEw7HIFl2+jtSwH0Ydj6Pp4lYJrkhrymPc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730376696; c=relaxed/simple; bh=AjcIyXaZAHmbI0poOFGfWCd9nLkYloalU6kHRzskv64=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=utkKEv+tMuicQfXpZtfH7VGhw/yri8lF5VQdzQuoDAdUA8noZNLW/shbTRqhIpa266xIn5e9HoXCB6TBHv4jbt7nlTXfDHKRbYH3Q5KeTz4Hhp5A2q9AgwhBWoZRA6l8wZSTZsof3GkC/EcInh9S6kYaayO4C1/oGCTsQRw/wzQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=IF6pfreW; arc=none smtp.client-ip=209.85.221.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IF6pfreW" Received: by mail-wr1-f48.google.com with SMTP id ffacd0b85a97d-37d3ecad390so1246971f8f.1; Thu, 31 Oct 2024 05:11:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730376692; x=1730981492; darn=vger.kernel.org; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=CYIf2HjwWeOrqyA8bh/VYoTm/NYlT2fenLJBBh/Gdo4=; b=IF6pfreWiMmTYXEXM3tHOVyokLAXViEvZsBpmxofxh3NIwnG3kHRiHB2nYvqvTIX+q 5+v1A4+rvjF+sWMYT+0WG+npljl7UTvVe1K5iwikCijwPahdHqtaS6eJK4cKO8JuuJAM ofKQt3N6y9wGc/mHxYbWit+vkH38Aoh8aQoKn0jQeNqUPGORcc3A0VYk96gAt1rJJHiD J1Jko3+pUw1B1jFDl1Q7uAbqyLWk36b3UZaW3qujT8EpFoFlgaDi+lE9Vyyfyaw16RlT 8Tfn5XNEpssKJopp2ZkQUIVh6Xd11gw8gpglJo/pQ2of+RySyJL5jrzW63ZpyiowHETl 1DKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730376692; x=1730981492; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=CYIf2HjwWeOrqyA8bh/VYoTm/NYlT2fenLJBBh/Gdo4=; b=MPyNyBRAqQfmr3RUBpbTXCRhoagCIc79PcovL/N46aLdbkvu6J0xUSo/ejsdFgcAry pPkDjtuzixOKIUyr0pbSOG6lq2dknMHJs+OVytxd323XwxEIU5VmgdvHfQBZzuSPno2e gyq9bueORYrfctJ7l0DORcVNIxS3dta5fFFjFsVJhnBfwK9i/ZKdt5lJIU6mc0Nhd0pl 1hUHjSaQzWP0KKxnXfRkhJp+fBaFLt1VB5PsYa9SCx1jPSV+jG/Uol5PtHYEOV8VYY7l mb0TrwA93hXTI4BHaehSP70TjECKPOKWBwK6MRqsqVr721ZP0JMjl/nRGhDtBCtHm2Ni gf9g== X-Forwarded-Encrypted: i=1; AJvYcCWH5mgQmdBFSeeRgHY1ebvyTcosGLrm9zGQbEubpqDK95QRb699WOtYyqFroRoRJ229ErL63DNNtTjrndA=@vger.kernel.org X-Gm-Message-State: AOJu0YzCXZngb2qZh5sxSHhWjmCTFn4I2yAyXgpbZmrPA5SgFH+kohJc XFjK2+rHbSy49gMtmbo5EH6TC5yd0q4BMoS2zpePu1frN7X+Fvlx X-Google-Smtp-Source: AGHT+IHrtzPOed5WE1Vq4z6/4B4q2Z4fqgyHnICqO/NAWJS6QBh9edI/rR9gby1IvXiHxk/u92vSyA== X-Received: by 2002:a05:6000:18a5:b0:367:8e57:8 with SMTP id ffacd0b85a97d-381c14a4ba2mr1880976f8f.19.1730376691594; Thu, 31 Oct 2024 05:11:31 -0700 (PDT) Received: from [127.0.1.1] (2a02-8389-41cf-e200-d7b9-afdb-c541-d023.cable.dynamic.v6.surfer.at. [2a02:8389:41cf:e200:d7b9:afdb:c541:d023]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4327d5ab305sm24111195e9.7.2024.10.31.05.11.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 31 Oct 2024 05:11:31 -0700 (PDT) From: Javier Carrasco Date: Thu, 31 Oct 2024 13:11:23 +0100 Subject: [PATCH v2] Bluetooth: btbcm: fix missing of_node_put() in btbcm_get_board_name() Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241031-bluetooth-btbcm-node-cleanup-v2-1-482d52910bfa@gmail.com> X-B4-Tracking: v=1; b=H4sIAOpzI2cC/43NSw6CMBSF4a2Qjr2mDxLEkfswDPq4hZtAa9pCN IS9W1mBw+8M/rOzjIkws3uzs4QbZYqhQl4aZicdRgRy1Uxy2QquOJh5xRJjmcAUYxcI0SHYGXV YXyCVk0J36tZxy2rildDT+8w/h+qJconpc75t4rf+Gd4EcPDOtqZ3vveoHuOiab7auLDhOI4vW ddVQsgAAAA= To: Marcel Holtmann , Luiz Augusto von Dentz , Linus Walleij Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1730376690; l=2032; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=AjcIyXaZAHmbI0poOFGfWCd9nLkYloalU6kHRzskv64=; b=UFumaFTuD+2/+/a2o79kaW1AW71drF7RL8PCZyZR5PuresyBgB1FaVpSSB6P2/JnT7aH6v5lc jcGAKQxMggwDEE3l9Rr5y/1E3RfI5pYDswdGydrOfoVrxyLJyo2mbdn X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= of_find_node_by_path() returns a pointer to a device_node with its refcount incremented, and a call to of_node_put() is required to decrement the refcount again and avoid leaking the resource. If 'of_property_read_string_index(root, "compatible", 0, &tmp)' fails, the function returns without calling of_node_put(root) before doing so. The automatic cleanup attribute can be used by means of the __free() macro to automatically call of_node_put() when the variable goes out of scope, fixing the issue and also accounting for new error paths. Fixes: 63fac3343b99 ("Bluetooth: btbcm: Support per-board firmware variants") Signed-off-by: Javier Carrasco --- Changes in v2: - Squash patches for mainline solution without intermediate steps. - Link to v1: https://lore.kernel.org/r/20241030-bluetooth-btbcm-node-cleanup-v1-0-fdc4b9df9fe3@gmail.com --- drivers/bluetooth/btbcm.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- base-commit: 6fb2fa9805c501d9ade047fc511961f3273cdcb5 change-id: 20241030-bluetooth-btbcm-node-cleanup-23d21a73870c Best regards, diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c index eef00467905e..a1153ada74d2 100644 --- a/drivers/bluetooth/btbcm.c +++ b/drivers/bluetooth/btbcm.c @@ -541,11 +541,10 @@ static const struct bcm_subver_table bcm_usb_subver_table[] = { static const char *btbcm_get_board_name(struct device *dev) { #ifdef CONFIG_OF - struct device_node *root; + struct device_node *root __free(device_node) = of_find_node_by_path("/"); char *board_type; const char *tmp; - root = of_find_node_by_path("/"); if (!root) return NULL; @@ -555,7 +554,6 @@ static const char *btbcm_get_board_name(struct device *dev) /* get rid of any '/' in the compatible string */ board_type = devm_kstrdup(dev, tmp, GFP_KERNEL); strreplace(board_type, '/', '-'); - of_node_put(root); return board_type; #else