From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 75C8935C6B9 for ; Wed, 26 Aug 2026 17:20:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787764823; cv=none; b=WacYCao/FgaoG0xeUGLWU8/UAF0GABcBWDY64Cymvlh0tHup2M0JR54ovffb9oR6zufaHCMK29qK5XLcYVfReCaaN1t+QorB5ZlOQmSftyFxuAp3McnHjZ4KbOA1xlmhExrMCSqu4LSv4dKyt93EWYGSgiePht3Ql9aUzqjWUhc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787764823; c=relaxed/simple; bh=TSQirgzf9thvAFSdOo0jIaXAmKOqw3n4K7GuA9TzubA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qLfIRnwYeS5N1+i2ByHJ6Fr/yjWF6BCLfRZpfuR8XcDGGPHWRPSuzOHaIUESIPvjuUITHNHzao2mde5d/TxCIzSZaMCY90a8H27rgUJtwPiXFVlzXhv7HIq1yz8bvqmN5NrCf1EQDoCyNX9Yhpuh5DK5EpVQXEP+BkSZzro7O4g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TUZzy5dU; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TUZzy5dU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B0CE1F00A3A; Wed, 26 Aug 2026 17:19:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787764798; bh=uCt+LJftkTGaWvtS0KhF7zhoRv03uEFImsHb8K0fP1M=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=TUZzy5dUbIkCCG/I9hTWXsl0e+A/VEhhccHXpxUxr1/L/9aPLAo9exyUUFIZXqXg4 7ccjk+T7+lhIpbAGeUX3pVb2vzB8+uECuOLmPxnouHPI/Wa8qyF/SoAXZhI3lYX6ft 8Ee2j1px4a+3nge5JCPD3TNYUUgtgdAEaVz6nKGQiTRGEyM17E26gL/XoI5VAP6xZU jWZlXaYuY77UHjT4RUOS7dgsU8D8XPw+jkXEIcxRn45o3OiX4D7t5yqSEF+lIMBbuU 126EphgOTW+TSA2hDslNWqC0cBYy1HDDvu2z9Kggf6QGVET9si6DB6fBff8IKyUwmF ybqnZiPG4NSVQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Dmitry Torokhov , Jiri Kosina , Sasha Levin Subject: [PATCH 6.12.y 1/3] HID: input: use __free(kfree) to clean up temporary buffers Date: Wed, 26 Aug 2026 13:19:52 -0400 Message-ID: <20260826171955.2266521-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026082542-footpath-citation-4670@gregkh> References: <2026082542-footpath-citation-4670@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: Dmitry Torokhov [ Upstream commit 142068281f5138a9888d488e6911e8d9f7923c15 ] The __free() cleanup automatically releases given resource when leaving the scope, so use it to make the code less cluttered with error handling. Signed-off-by: Dmitry Torokhov Signed-off-by: Jiri Kosina Stable-dep-of: d07644524b65 ("HID: input: read battery capacity from its actual report offset") Signed-off-by: Sasha Levin --- drivers/hid/hid-input.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index c1708caa6b6cc..74d04e5c7f0b7 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -419,23 +419,18 @@ static int hidinput_scale_battery_capacity(struct hid_device *dev, static int hidinput_query_battery_capacity(struct hid_device *dev) { - u8 *buf; int ret; - buf = kmalloc(4, GFP_KERNEL); + u8 *buf __free(kfree) = kmalloc(4, GFP_KERNEL); if (!buf) return -ENOMEM; ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, dev->battery_report_type, HID_REQ_GET_REPORT); - if (ret < 2) { - kfree(buf); + if (ret < 2) return -ENODATA; - } - ret = hidinput_scale_battery_capacity(dev, buf[1]); - kfree(buf); - return ret; + return hidinput_scale_battery_capacity(dev, buf[1]); } static int hidinput_get_battery_property(struct power_supply *psy, @@ -1818,7 +1813,6 @@ static void hidinput_led_worker(struct work_struct *work) struct hid_report *report; int ret; u32 len; - __u8 *buf; field = hidinput_get_led_field(hid); if (!field) @@ -1845,7 +1839,7 @@ static void hidinput_led_worker(struct work_struct *work) /* fall back to generic raw-output-report */ len = hid_report_len(report); - buf = hid_alloc_report_buf(report, GFP_KERNEL); + u8 *buf __free(kfree) = hid_alloc_report_buf(report, GFP_KERNEL); if (!buf) return; @@ -1855,7 +1849,6 @@ static void hidinput_led_worker(struct work_struct *work) if (ret == -ENOSYS) hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT); - kfree(buf); } static int hidinput_input_event(struct input_dev *dev, unsigned int type, -- 2.53.0