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[23.88.128.2]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-433efb816e4sm958392fac.1.2026.04.27.19.43.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Apr 2026 19:43:45 -0700 (PDT) From: Maxwell Doose To: songqiang1304521@gmail.com, jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] iio: magnetometer: rm3100: Use scoped_guard in rm3100_trigger_handler() Date: Mon, 27 Apr 2026 21:43:39 -0500 Message-ID: <20260428024339.45109-5-m32285159@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260428024339.45109-1-m32285159@gmail.com> References: <20260428024339.45109-1-m32285159@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace mutex_lock() and mutex_unlock() calls in rm3100_trigger_handler() with the more modern scoped_guard(). This will help modernize the driver and bring it up-to-date with modern available macros/functions. Signed-off-by: Maxwell Doose --- drivers/iio/magnetometer/rm3100-core.c | 72 ++++++++++++-------------- 1 file changed, 33 insertions(+), 39 deletions(-) diff --git a/drivers/iio/magnetometer/rm3100-core.c b/drivers/iio/magnetometer/rm3100-core.c index a2c3448e296c..f55796e3ebef 100644 --- a/drivers/iio/magnetometer/rm3100-core.c +++ b/drivers/iio/magnetometer/rm3100-core.c @@ -457,48 +457,42 @@ static irqreturn_t rm3100_trigger_handler(int irq, void *p) struct regmap *regmap = data->regmap; int ret, i, bit; - mutex_lock(&data->lock); - switch (scan_mask) { - case BIT(0) | BIT(1) | BIT(2): - ret = regmap_bulk_read(regmap, RM3100_REG_MX2, data->buffer, 9); - mutex_unlock(&data->lock); - if (ret < 0) - goto done; - /* Convert XXXYYYZZZxxx to XXXxYYYxZZZx. x for paddings. */ - for (i = 2; i > 0; i--) - memmove(data->buffer + i * 4, data->buffer + i * 3, 3); - break; - case BIT(0) | BIT(1): - ret = regmap_bulk_read(regmap, RM3100_REG_MX2, data->buffer, 6); - mutex_unlock(&data->lock); - if (ret < 0) - goto done; - memmove(data->buffer + 4, data->buffer + 3, 3); - break; - case BIT(1) | BIT(2): - ret = regmap_bulk_read(regmap, RM3100_REG_MY2, data->buffer, 6); - mutex_unlock(&data->lock); - if (ret < 0) - goto done; - memmove(data->buffer + 4, data->buffer + 3, 3); - break; - case BIT(0) | BIT(2): - ret = regmap_bulk_read(regmap, RM3100_REG_MX2, data->buffer, 9); - mutex_unlock(&data->lock); - if (ret < 0) - goto done; - memmove(data->buffer + 4, data->buffer + 6, 3); - break; - default: - for_each_set_bit(bit, &scan_mask, mask_len) { - ret = regmap_bulk_read(regmap, RM3100_REG_MX2 + 3 * bit, - data->buffer, 3); - if (ret < 0) { - mutex_unlock(&data->lock); + scoped_guard(mutex, &data->lock) { + switch (scan_mask) { + case BIT(0) | BIT(1) | BIT(2): + ret = regmap_bulk_read(regmap, RM3100_REG_MX2, data->buffer, 9); + if (ret < 0) + goto done; + /* Convert XXXYYYZZZxxx to XXXxYYYxZZZx. x for paddings. */ + for (i = 2; i > 0; i--) + memmove(data->buffer + i * 4, data->buffer + i * 3, 3); + break; + case BIT(0) | BIT(1): + ret = regmap_bulk_read(regmap, RM3100_REG_MX2, data->buffer, 6); + if (ret < 0) + goto done; + memmove(data->buffer + 4, data->buffer + 3, 3); + break; + case BIT(1) | BIT(2): + ret = regmap_bulk_read(regmap, RM3100_REG_MY2, data->buffer, 6); + if (ret < 0) goto done; + memmove(data->buffer + 4, data->buffer + 3, 3); + break; + case BIT(0) | BIT(2): + ret = regmap_bulk_read(regmap, RM3100_REG_MX2, data->buffer, 9); + if (ret < 0) + goto done; + memmove(data->buffer + 4, data->buffer + 6, 3); + break; + default: + for_each_set_bit(bit, &scan_mask, mask_len) { + ret = regmap_bulk_read(regmap, RM3100_REG_MX2 + 3 * bit, + data->buffer, 3); + if (ret < 0) + goto done; } } - mutex_unlock(&data->lock); } /* * Always using the same buffer so that we wouldn't need to set the -- 2.53.0