From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 931B937BE7B for ; Mon, 12 Jan 2026 17:26:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768238761; cv=none; b=j2de31AAEhtPW7O2CESd/t/Tpm3FhnirQdpY7IzhpGxcZlhPLr67l29dm5uqYgfb9KnC5kUGGjyQGNoTfrM50kMaBXL+AuoEYW5QbBsQ1VH8564meUvwtD8ImsQv9bLYOedndx+GBux0HbnosdvCVigPtDj1pUffZKke0hnXPSY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768238761; c=relaxed/simple; bh=8W1vW5K0kd/FCB9pFQnQZmQeH9GQxl5guJYx3iKBXPU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ANXfTodmmMlz3IfhrI9+DlTCcyiMozKt2THVZ8dcKh6DotvWcFJ2TIF5ThIx8MD8fHzaDJgUNTqQgV7yK+ChZteH6nbthDDIaCNb9T8BTyzj/Kz8Q4bIbTtQTH25iRNz1U/LJ+Yz8mdWtTwWmMCV9iREep7gFcF8317kFZpN54M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hmlS8Jsa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hmlS8Jsa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6517C116D0; Mon, 12 Jan 2026 17:26:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768238761; bh=8W1vW5K0kd/FCB9pFQnQZmQeH9GQxl5guJYx3iKBXPU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hmlS8JsanygvrG09VmtbCXYBwJsHDGSYhA0AV11Uz9Q5yJn/JqTT+Eb2kKlVrUBUD xdpzPb+qnJ8wY8wC9aGwR/r+bwfw79yJ3PKPkf2XpUvS90E7Kg78CHmY+v11Fdtis8 DlGmN2enmz55cWYx+xG4n66ntOUcxm5Mja2Z4QV6D8ttevhCwflV5dclmYZPPmxTNa 259sZEHA5WNPkNwVYIv/8wZyAANbki0UnN0Zhd2/6tdnSfeLXN7Edl8PcuPustig1N Q1axEf3TCHnnT4d8dEN79y0zeClPKMD5qVhZzOViGJLZIMZfXidqMHki2oiyy+OGjv lYFgLW3VTQhMA== From: Sasha Levin To: stable@vger.kernel.org Cc: Takashi Iwai , Sasha Levin Subject: [PATCH 6.6.y 1/2] ALSA: ac97bus: Use guard() for mutex locks Date: Mon, 12 Jan 2026 12:25:57 -0500 Message-ID: <20260112172558.815821-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <2026011239-sustained-underpass-b703@gregkh> References: <2026011239-sustained-underpass-b703@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Takashi Iwai [ Upstream commit c07824a14d99c10edd4ec4c389d219af336ecf20 ] Replace the manual mutex lock/unlock pairs with guard() for code simplification. Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829151335.7342-18-tiwai@suse.de Stable-dep-of: 830988b6cf19 ("ALSA: ac97: fix a double free in snd_ac97_controller_register()") Signed-off-by: Sasha Levin --- sound/ac97/bus.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/sound/ac97/bus.c b/sound/ac97/bus.c index 3173e9d98927e..1a966d74e8af6 100644 --- a/sound/ac97/bus.c +++ b/sound/ac97/bus.c @@ -242,10 +242,9 @@ static ssize_t cold_reset_store(struct device *dev, { struct ac97_controller *ac97_ctrl; - mutex_lock(&ac97_controllers_mutex); + guard(mutex)(&ac97_controllers_mutex); ac97_ctrl = to_ac97_controller(dev); ac97_ctrl->ops->reset(ac97_ctrl); - mutex_unlock(&ac97_controllers_mutex); return len; } static DEVICE_ATTR_WO(cold_reset); @@ -259,10 +258,9 @@ static ssize_t warm_reset_store(struct device *dev, if (!dev) return -ENODEV; - mutex_lock(&ac97_controllers_mutex); + guard(mutex)(&ac97_controllers_mutex); ac97_ctrl = to_ac97_controller(dev); ac97_ctrl->ops->warm_reset(ac97_ctrl); - mutex_unlock(&ac97_controllers_mutex); return len; } static DEVICE_ATTR_WO(warm_reset); @@ -285,10 +283,10 @@ static const struct attribute_group *ac97_adapter_groups[] = { static void ac97_del_adapter(struct ac97_controller *ac97_ctrl) { - mutex_lock(&ac97_controllers_mutex); - ac97_ctrl_codecs_unregister(ac97_ctrl); - list_del(&ac97_ctrl->controllers); - mutex_unlock(&ac97_controllers_mutex); + scoped_guard(mutex, &ac97_controllers_mutex) { + ac97_ctrl_codecs_unregister(ac97_ctrl); + list_del(&ac97_ctrl->controllers); + } device_unregister(&ac97_ctrl->adap); } @@ -312,7 +310,7 @@ static int ac97_add_adapter(struct ac97_controller *ac97_ctrl) { int ret; - mutex_lock(&ac97_controllers_mutex); + guard(mutex)(&ac97_controllers_mutex); ret = idr_alloc(&ac97_adapter_idr, ac97_ctrl, 0, 0, GFP_KERNEL); ac97_ctrl->nr = ret; if (ret >= 0) { @@ -323,13 +321,11 @@ static int ac97_add_adapter(struct ac97_controller *ac97_ctrl) if (ret) put_device(&ac97_ctrl->adap); } - if (!ret) + if (!ret) { list_add(&ac97_ctrl->controllers, &ac97_controllers); - mutex_unlock(&ac97_controllers_mutex); - - if (!ret) dev_dbg(&ac97_ctrl->adap, "adapter registered by %s\n", dev_name(ac97_ctrl->parent)); + } return ret; } -- 2.51.0