linux-kernel - [PATCH v2 1/3] wifi: ath: Convert sprintf/snprintf to sysfs

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Date: Fri, 15 Mar 2024 13:52:09 +0800
From: Li Zhijian <lizhijian@...itsu.com>
To: linux-kernel@...r.kernel.org
Cc: Li Zhijian <lizhijian@...itsu.com>,
	Kalle Valo <kvalo@...nel.org>,
	Jeff Johnson <jjohnson@...nel.org>,
	linux-wireless@...r.kernel.org,
	ath11k@...ts.infradead.org,
	ath10k@...ts.infradead.org
Subject: [PATCH v2 1/3] wifi: ath: Convert sprintf/snprintf to sysfs_emit

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() will be converted as weel if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Kalle Valo <kvalo@...nel.org>
CC: Jeff Johnson <jjohnson@...nel.org>
CC: linux-wireless@...r.kernel.org
CC: ath11k@...ts.infradead.org
CC: ath10k@...ts.infradead.org
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
V2: subject updated

This is a part of the work "Fix coccicheck device_attr_show warnings"[1]
Split them per subsystem so that the maintainer can review it easily
[1] https://lore.kernel.org/lkml/20240116041129.3937800-1-lizhijian@fujitsu.com/
---
 drivers/net/wireless/ath/ath10k/thermal.c | 2 +-
 drivers/net/wireless/ath/ath11k/thermal.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/thermal.c b/drivers/net/wireless/ath/ath10k/thermal.c
index 31c8d7fbb095..8b15ec07b107 100644
--- a/drivers/net/wireless/ath/ath10k/thermal.c
+++ b/drivers/net/wireless/ath/ath10k/thermal.c
@@ -100,7 +100,7 @@ static ssize_t ath10k_thermal_show_temp(struct device *dev,
 	spin_unlock_bh(&ar->data_lock);
 
 	/* display in millidegree celsius */
-	ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
+	ret = sysfs_emit(buf, "%d\n", temperature * 1000);
 out:
 	mutex_unlock(&ar->conf_mutex);
 	return ret;
diff --git a/drivers/net/wireless/ath/ath11k/thermal.c b/drivers/net/wireless/ath/ath11k/thermal.c
index 41e7499f075f..18d6eab5cce3 100644
--- a/drivers/net/wireless/ath/ath11k/thermal.c
+++ b/drivers/net/wireless/ath/ath11k/thermal.c
@@ -101,7 +101,7 @@ static ssize_t ath11k_thermal_show_temp(struct device *dev,
 	spin_unlock_bh(&ar->data_lock);
 
 	/* display in millidegree Celsius */
-	ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
+	ret = sysfs_emit(buf, "%d\n", temperature * 1000);
 out:
 	mutex_unlock(&ar->conf_mutex);
 	return ret;
-- 
2.29.2