From nobody Thu Apr 9 15:50:06 2026 Received: from mail-pj1-f43.google.com (mail-pj1-f43.google.com [209.85.216.43]) (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 3FC5A451071 for ; Fri, 6 Mar 2026 20:27:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772828838; cv=none; b=AoNQVIyjuPwVyJUfKZVfJ+h7XbVHliMPKZhNs+16x7nsoV+N62JCABNN/R0FUYvgD1hHlDUj0O5rnhGk+s9thxi23x57kcfaGIEOo6MdmP20iuMfX662CmtZC+Hq81x4qC74o74iX/ZUCzEMCb9cbm5/t+XU/FJ5YyThYZTFtSA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772828838; c=relaxed/simple; bh=g3oAsMDa6tuR+/A6Em0En8JCTZpVH/momdRatLteLhE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=I1xV4qXIxL1iL74m+FocaKAii9JFX+E9JGo6poonFrdIoAaytBXd29k1yKzBOwQu79jIqsto5qQW7tbRaB7+gvNHZnQbErZ8tA892RT2Fr7pbwS1PqgIcTvKI97A48G1yfAksAxvAxzWJyPZXOrZaxU37uByT7V2PhnQ3hRI53s= 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=bSWpWrvb; arc=none smtp.client-ip=209.85.216.43 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="bSWpWrvb" Received: by mail-pj1-f43.google.com with SMTP id 98e67ed59e1d1-3598b2318c2so3659174a91.3 for ; Fri, 06 Mar 2026 12:27:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772828836; x=1773433636; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=raCgZFvVUfOpsCKvrIvPbVa+6HmFw1W/wn9qNthdpCU=; b=bSWpWrvbnmwJt+kLA7LpIZhk7gt0jui3qFdFjGYhCbnQLl26XUuz1Q6i5akrGjFEAM 2FyovGM6aI+6iaBrq4hFhz3kxFAOXBM9fvhjaCfLXTJisgNpTcI+D9AmCSGcLSpljyMJ FmuybG+nPaGp8QZjd3N5rlbpihtqdzwWlDfbKSbqPUBk49X+vBlMYZsf8FVwuaZ9Y8eM SjR5Z2w8pOX9dHE2CNJVGadWp5Ztn5+o2NkoyNE6XAiL0wsIbDIwNd/G2189ZvMip8Ds Bhs3QX78pnJ96IsveD1LNWGhFwJAx3RvjnN9ThOvDZmaQ9tLHMgQDGEFqHwPKT224Ire cyQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772828836; x=1773433636; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=raCgZFvVUfOpsCKvrIvPbVa+6HmFw1W/wn9qNthdpCU=; b=lfLXwrYin9BYpCP3hifShAy4Ll9ioIAIvh/JJJCfF9yC/awEGWJ6fkbCfXmvxIrXcp fzebfWrHWTifh8ztYpWFWcxivI2BrspFLojQsiH9jtllqJozWYPtKI4xznh55P0Qxe98 +lV5v90l6PlGikBBthK/epGaj5/+fJFEBT1FAnZpXjkozhJ/wCoFy+Qi3u7lnjoU0uIx YbSxDAr6/RhNOMzqI5mLIYGMpL0BbdV6r3zqO9AXGzlGWOO4rpygo3/Ii5ymLUWjSDr3 YZRW5XZj1tGhn2FtR/moXcJM2aQQC82Naf7rp0YYdm8ZO5tt/cmNu1x/Sff8Kf3MT9UB WfYg== X-Forwarded-Encrypted: i=1; AJvYcCWOmScKbLBuHATCmw+DCdODQ34M5p/cINBCCchibtdDzyM20Q7fC63stbGom1Wabt520TQ2pQHwkAPSlXc=@vger.kernel.org X-Gm-Message-State: AOJu0YyooMX+f4x/LIJX0NAd8ONmGsm5JpNygVwkXRA0Nc2puj6VXMNH mhUelkRZ/auA6LrNbCytfkM8DrfXIEXduFQ2hJAV+ea+TA4UeyEvm+tY X-Gm-Gg: ATEYQzx9Qltx0KIQnM0QkIRRuRf21Dni0k1Vtv9EvUyFzB2EjVj7te18qg/0k06A59n tDwICXriciF6y2/ZyXelYcgphRljHXELYIhS1E4ftI2vQlnUR+VPSGIl93WMyDgnBGLwm4UcsdG rahfSM85Z884ooFMa4SY2sVc7iXtBTYr4yQxlNxpJLfAVneF2e53ysYLL6TJPaku9hu5s7zrJxo hDB8MlDMoyRUvqqVZfoe7SbWdF3Ig+HzM//nX7LuRz0l5I6KSjVCUKqd2BkdL4dRA2c2Z8PGqTe /oiYWCAA2dWo5s5itmIs1ciX76Y5jYqwBJyDhqDXVcGseM37ZYqvYYJkunzNFFKQnNUlr/kESXC sqva80XO9e7lCh8hzdNQ1npleQKv1OTJjfoPodnYAgqB6/s/G9wQUKJ5cDEtymOlPGZivbrv8tu HbrIvArXBgcecxf46yCFieSTQexz8coETqwrmatGnKVvgIW9Z7EUXrPNk70Pa+mF+loWHLBZ6zY cBu58FrYxXlUqkjF/i6Tsi+ezS8Yr8+MWE= X-Received: by 2002:a17:90b:3c4a:b0:356:24f0:af08 with SMTP id 98e67ed59e1d1-359be28d404mr3003809a91.1.1772828836429; Fri, 06 Mar 2026 12:27:16 -0800 (PST) Received: from fedora ([103.215.156.29]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-359b2d5fe2dsm6326572a91.7.2026.03.06.12.27.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Mar 2026 12:27:16 -0800 (PST) From: Rajveer Chaudhari To: lucas.p.stankus@gmail.com, lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, puranjay@kernel.org Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Rajveer Chaudhari Subject: [PATCH] iio: convert to guard(mutex) Date: Sat, 7 Mar 2026 01:56:50 +0530 Message-ID: <20260306202650.61865-1-rajveer.chaudhari.linux@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace manual mutex_lock/mutex_unlock pairs with guard(mutex) in several IIO drivers. This ensures the mutex is released on every return path, preventing missed unlocks on error paths. Signed-off-by: Rajveer Chaudhari --- drivers/iio/accel/adxl313_core.c | 7 +++---- drivers/iio/accel/adxl355_core.c | 27 ++++++++------------------- drivers/iio/accel/adxl372.c | 8 +++----- drivers/iio/industrialio-sw-device.c | 4 ++-- drivers/iio/industrialio-sw-trigger.c | 4 ++-- 5 files changed, 18 insertions(+), 32 deletions(-) diff --git a/drivers/iio/accel/adxl313_core.c b/drivers/iio/accel/adxl313_c= ore.c index 9f5d4d2cb325..94c6023af487 100644 --- a/drivers/iio/accel/adxl313_core.c +++ b/drivers/iio/accel/adxl313_core.c @@ -8,6 +8,7 @@ */ =20 #include +#include #include #include #include @@ -356,18 +357,16 @@ static int adxl313_read_axis(struct adxl313_data *dat= a, { int ret; =20 - mutex_lock(&data->lock); + guard(mutex)(&data->lock); =20 ret =3D regmap_bulk_read(data->regmap, ADXL313_REG_DATA_AXIS(chan->address), &data->transf_buf, sizeof(data->transf_buf)); if (ret) - goto unlock_ret; + return ret; =20 ret =3D le16_to_cpu(data->transf_buf); =20 -unlock_ret: - mutex_unlock(&data->lock); return ret; } =20 diff --git a/drivers/iio/accel/adxl355_core.c b/drivers/iio/accel/adxl355_c= ore.c index 1c1d64d5cbcb..ef05178bff00 100644 --- a/drivers/iio/accel/adxl355_core.c +++ b/drivers/iio/accel/adxl355_core.c @@ -9,6 +9,7 @@ =20 #include #include +#include #include #include #include @@ -263,12 +264,11 @@ static int adxl355_data_rdy_trigger_set_state(struct = iio_trigger *trig, struct adxl355_data *data =3D iio_priv(indio_dev); int ret; =20 - mutex_lock(&data->lock); + guard(mutex)(&data->lock); ret =3D regmap_update_bits(data->regmap, ADXL355_POWER_CTL_REG, ADXL355_POWER_CTL_DRDY_MSK, FIELD_PREP(ADXL355_POWER_CTL_DRDY_MSK, state ? 0 : 1)); - mutex_unlock(&data->lock); =20 return ret; } @@ -409,16 +409,15 @@ static int adxl355_set_odr(struct adxl355_data *data, { int ret; =20 - mutex_lock(&data->lock); + guard(mutex)(&data->lock); =20 if (data->odr =3D=3D odr) { - mutex_unlock(&data->lock); return 0; } =20 ret =3D adxl355_set_op_mode(data, ADXL355_STANDBY); if (ret) - goto err_unlock; + return ret; =20 ret =3D regmap_update_bits(data->regmap, ADXL355_FILTER_REG, ADXL355_FILTER_ODR_MSK, @@ -433,13 +432,10 @@ static int adxl355_set_odr(struct adxl355_data *data, if (ret) goto err_set_opmode; =20 - mutex_unlock(&data->lock); return 0; =20 err_set_opmode: adxl355_set_op_mode(data, ADXL355_MEASUREMENT); -err_unlock: - mutex_unlock(&data->lock); return ret; } =20 @@ -448,16 +444,15 @@ static int adxl355_set_hpf_3db(struct adxl355_data *d= ata, { int ret; =20 - mutex_lock(&data->lock); + guard(mutex)(&data->lock); =20 if (data->hpf_3db =3D=3D hpf) { - mutex_unlock(&data->lock); return 0; } =20 ret =3D adxl355_set_op_mode(data, ADXL355_STANDBY); if (ret) - goto err_unlock; + return ret; =20 ret =3D regmap_update_bits(data->regmap, ADXL355_FILTER_REG, ADXL355_FILTER_HPF_MSK, @@ -471,13 +466,10 @@ static int adxl355_set_hpf_3db(struct adxl355_data *d= ata, if (ret) goto err_set_opmode; =20 - mutex_unlock(&data->lock); return 0; =20 err_set_opmode: adxl355_set_op_mode(data, ADXL355_MEASUREMENT); -err_unlock: - mutex_unlock(&data->lock); return ret; } =20 @@ -486,11 +478,11 @@ static int adxl355_set_calibbias(struct adxl355_data = *data, { int ret; =20 - mutex_lock(&data->lock); + guard(mutex)(&data->lock); =20 ret =3D adxl355_set_op_mode(data, ADXL355_STANDBY); if (ret) - goto err_unlock; + return ret; =20 put_unaligned_be16(calibbias, data->transf_buf); ret =3D regmap_bulk_write(data->regmap, @@ -505,13 +497,10 @@ static int adxl355_set_calibbias(struct adxl355_data = *data, if (ret) goto err_set_opmode; =20 - mutex_unlock(&data->lock); return 0; =20 err_set_opmode: adxl355_set_op_mode(data, ADXL355_MEASUREMENT); -err_unlock: - mutex_unlock(&data->lock); return ret; } =20 diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c index 28a8793a53b6..24a79f61900d 100644 --- a/drivers/iio/accel/adxl372.c +++ b/drivers/iio/accel/adxl372.c @@ -7,6 +7,7 @@ =20 #include #include +#include #include #include #include @@ -336,17 +337,14 @@ static ssize_t adxl372_write_threshold_value(struct i= io_dev *indio_dev, unsigned struct adxl372_state *st =3D iio_priv(indio_dev); int ret; =20 - mutex_lock(&st->threshold_m); + guard(mutex)(&st->threshold_m); ret =3D regmap_write(st->regmap, addr, ADXL372_THRESH_VAL_H_SEL(threshold= )); if (ret < 0) - goto unlock; + return ret; =20 ret =3D regmap_update_bits(st->regmap, addr + 1, GENMASK(7, 5), ADXL372_THRESH_VAL_L_SEL(threshold) << 5); =20 -unlock: - mutex_unlock(&st->threshold_m); - return ret; } =20 diff --git a/drivers/iio/industrialio-sw-device.c b/drivers/iio/industriali= o-sw-device.c index 3582524de0b8..a2a3e3a67d79 100644 --- a/drivers/iio/industrialio-sw-device.c +++ b/drivers/iio/industrialio-sw-device.c @@ -10,6 +10,7 @@ #include #include #include +#include =20 #include #include @@ -84,11 +85,10 @@ struct iio_sw_device_type *iio_get_sw_device_type(const= char *name) { struct iio_sw_device_type *dt; =20 - mutex_lock(&iio_device_types_lock); + guard(mutex)(&iio_device_types_lock); dt =3D __iio_find_sw_device_type(name, strlen(name)); if (dt && !try_module_get(dt->owner)) dt =3D NULL; - mutex_unlock(&iio_device_types_lock); =20 return dt; } diff --git a/drivers/iio/industrialio-sw-trigger.c b/drivers/iio/industrial= io-sw-trigger.c index 334b6b10a784..4af601ae286c 100644 --- a/drivers/iio/industrialio-sw-trigger.c +++ b/drivers/iio/industrialio-sw-trigger.c @@ -10,6 +10,7 @@ #include #include #include +#include =20 #include #include @@ -88,11 +89,10 @@ struct iio_sw_trigger_type *iio_get_sw_trigger_type(con= st char *name) { struct iio_sw_trigger_type *t; =20 - mutex_lock(&iio_trigger_types_lock); + guard(mutex)(&iio_trigger_types_lock); t =3D __iio_find_sw_trigger_type(name, strlen(name)); if (t && !try_module_get(t->owner)) t =3D NULL; - mutex_unlock(&iio_trigger_types_lock); =20 return t; } --=20 2.53.0