linux-kernel - [PATCH] counter: replace snprintf in show functions with sysfs

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Message-Id: <1634095619-4174-1-git-send-email-wangqing@vivo.com>
Date:   Tue, 12 Oct 2021 20:26:59 -0700
From:   Qing Wang <wangqing@...o.com>
To:     Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-iio@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Qing Wang <wangqing@...o.com>
Subject: [PATCH] counter: replace snprintf in show functions with sysfs_emit

coccicheck complains about the use of snprintf() in sysfs show functions.

Fix the following coccicheck warning:
drivers/counter/stm32-lptimer-cnt.c:265:8-16: WARNING: use scnprintf or sprintf.
drivers/counter/stm32-lptimer-cnt.c:176:8-16: WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@...o.com>
---
 drivers/counter/stm32-lptimer-cnt.c | 2 +-
 drivers/counter/stm32-timer-cnt.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c
index c19d998..6f1113a 100644
--- a/drivers/counter/stm32-lptimer-cnt.c
+++ b/drivers/counter/stm32-lptimer-cnt.c
@@ -262,7 +262,7 @@ static ssize_t stm32_lptim_cnt_ceiling_read(struct counter_device *counter,
 {
 	struct stm32_lptim_cnt *const priv = counter->priv;
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", priv->ceiling);
+	return sysfs_emit(buf, "%u\n", priv->ceiling);
 }
 
 static ssize_t stm32_lptim_cnt_ceiling_write(struct counter_device *counter,
diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c
index 603b30a..e772586 100644
--- a/drivers/counter/stm32-timer-cnt.c
+++ b/drivers/counter/stm32-timer-cnt.c
@@ -173,7 +173,7 @@ static ssize_t stm32_count_ceiling_read(struct counter_device *counter,
 
 	regmap_read(priv->regmap, TIM_ARR, &arr);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", arr);
+	return sysfs_emit(buf, "%u\n", arr);
 }
 
 static ssize_t stm32_count_ceiling_write(struct counter_device *counter,
-- 
2.7.4