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[185.246.87.17]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4256af55c0asm37972575e9.15.2024.06.28.07.48.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jun 2024 07:48:43 -0700 (PDT) From: Guillaume Stols Date: Fri, 28 Jun 2024 14:48:28 +0000 Subject: [PATCH v2 10/10] iio: adc: ad7606: switch mutexes to scoped_guard Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240628-cleanup-ad7606-v2-10-96e02f90256d@baylibre.com> References: <20240628-cleanup-ad7606-v2-0-96e02f90256d@baylibre.com> In-Reply-To: <20240628-cleanup-ad7606-v2-0-96e02f90256d@baylibre.com> To: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Beniamin Bia , Stefan Popa Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Hennerich , linux-fbdev@vger.kernel.org, devicetree@vger.kernel.org, Jonathan Cameron , Guillaume Stols , jstephan@baylibre.com, dlechner@baylibre.com X-Mailer: b4 0.14.0 Switching to scoped_guard simplifies the code and avoids to take care to unlock the mutex in case of premature return. Signed-off-by: Guillaume Stols --- drivers/iio/adc/ad7606.c | 60 ++++++++++++++++++++++----------------------= ---- 1 file changed, 27 insertions(+), 33 deletions(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 50ccc245e314..3c439787d130 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -69,19 +69,17 @@ static int ad7606_reg_access(struct iio_dev *indio_dev, struct ad7606_state *st =3D iio_priv(indio_dev); int ret; =20 - mutex_lock(&st->lock); + guard(mutex)(&st->lock); + if (readval) { ret =3D st->bops->reg_read(st, reg); if (ret < 0) - goto err_unlock; + return ret; *readval =3D ret; - ret =3D 0; + return 0; } else { - ret =3D st->bops->reg_write(st, reg, writeval); + return st->bops->reg_write(st, reg, writeval); } -err_unlock: - mutex_unlock(&st->lock); - return ret; } =20 static int ad7606_read_samples(struct ad7606_state *st) @@ -124,18 +122,18 @@ static irqreturn_t ad7606_trigger_handler(int irq, vo= id *p) struct ad7606_state *st =3D iio_priv(indio_dev); int ret; =20 - mutex_lock(&st->lock); + scoped_guard(mutex, &st->lock) { + ret =3D ad7606_read_samples(st); + if (ret) + goto error_ret; =20 - ret =3D ad7606_read_samples(st); - if (ret =3D=3D 0) iio_push_to_buffers_with_timestamp(indio_dev, st->data, iio_get_time_ns(indio_dev)); - - iio_trigger_notify_done(indio_dev->trig); - /* The rising edge of the CONVST signal starts a new conversion. */ - gpiod_set_value(st->gpio_convst, 1); - - mutex_unlock(&st->lock); +error_ret: + iio_trigger_notify_done(indio_dev->trig); + /* The rising edge of the CONVST signal starts a new conversion. */ + gpiod_set_value(st->gpio_convst, 1); + } =20 return IRQ_HANDLED; } @@ -259,17 +257,15 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, =20 switch (mask) { case IIO_CHAN_INFO_SCALE: - mutex_lock(&st->lock); - i =3D find_closest(val2, st->scale_avail, st->num_scales); - if (st->sw_mode_en) - ch =3D chan->address; - ret =3D st->write_scale(indio_dev, ch, i); - if (ret < 0) { - mutex_unlock(&st->lock); - return ret; + scoped_guard(mutex, &st->lock) { + i =3D find_closest(val2, st->scale_avail, st->num_scales); + if (st->sw_mode_en) + ch =3D chan->address; + ret =3D st->write_scale(indio_dev, ch, i); + if (ret < 0) + return ret; + st->range[ch] =3D i; } - st->range[ch] =3D i; - mutex_unlock(&st->lock); =20 return 0; case IIO_CHAN_INFO_OVERSAMPLING_RATIO: @@ -277,14 +273,12 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, return -EINVAL; i =3D find_closest(val, st->oversampling_avail, st->num_os_ratios); - mutex_lock(&st->lock); - ret =3D st->write_os(indio_dev, i); - if (ret < 0) { - mutex_unlock(&st->lock); - return ret; + scoped_guard(mutex, &st->lock) { + ret =3D st->write_os(indio_dev, i); + if (ret < 0) + return ret; + st->oversampling =3D st->oversampling_avail[i]; } - st->oversampling =3D st->oversampling_avail[i]; - mutex_unlock(&st->lock); =20 return 0; default: --=20 2.34.1