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From:   Dmitry Antipov <dmantipov@yandex.ru>
To:     Jeff Johnson <quic_jjohnson@quicinc.com>
Cc:     Kalle Valo <kvalo@kernel.org>, linux-wireless@vger.kernel.org,
        lvc-project@linuxtesting.org, Dmitry Antipov <dmantipov@yandex.ru>
Subject: [PATCH 2/2] wifi: ath10k: consistently use kstrtoX_from_user() functions
Date:   Tue,  8 Aug 2023 18:25:36 +0300
Message-ID: <20230808152542.91117-2-dmantipov@yandex.ru>
In-Reply-To: <20230808152542.91117-1-dmantipov@yandex.ru>
References: <20230808152542.91117-1-dmantipov@yandex.ru>
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Use 'kstrtoul_from_user()', 'kstrtouint_from_user()', and
'kstrtobool_from_user()' where appropriate and thus avoid
some code duplication.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
---
 drivers/net/wireless/ath/ath10k/debug.c    | 41 ++++++----------------
 drivers/net/wireless/ath/ath10k/spectral.c | 26 +++++---------
 2 files changed, 19 insertions(+), 48 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index f9518e1c9903..07a92f5296b6 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -1964,20 +1964,13 @@ static ssize_t ath10k_write_btcoex(struct file *file,
 				   size_t count, loff_t *ppos)
 {
 	struct ath10k *ar = file->private_data;
-	char buf[32];
-	size_t buf_size;
 	int ret;
 	bool val;
 	u32 pdev_param;
 
-	buf_size = min(count, (sizeof(buf) - 1));
-	if (copy_from_user(buf, ubuf, buf_size))
-		return -EFAULT;
-
-	buf[buf_size] = '\0';
-
-	if (kstrtobool(buf, &val) != 0)
-		return -EINVAL;
+	ret = kstrtobool_from_user(ubuf, count, &val);
+	if (ret)
+		return ret;
 
 	if (!ar->coex_support)
 		return -EOPNOTSUPP;
@@ -2103,19 +2096,12 @@ static ssize_t ath10k_write_peer_stats(struct file *file,
 				       size_t count, loff_t *ppos)
 {
 	struct ath10k *ar = file->private_data;
-	char buf[32];
-	size_t buf_size;
 	int ret;
 	bool val;
 
-	buf_size = min(count, (sizeof(buf) - 1));
-	if (copy_from_user(buf, ubuf, buf_size))
-		return -EFAULT;
-
-	buf[buf_size] = '\0';
-
-	if (kstrtobool(buf, &val) != 0)
-		return -EINVAL;
+	ret = kstrtobool_from_user(ubuf, count, &val);
+	if (ret)
+		return ret;
 
 	mutex_lock(&ar->conf_mutex);
 
@@ -2239,21 +2225,16 @@ static ssize_t ath10k_sta_tid_stats_mask_write(struct file *file,
 					       size_t count, loff_t *ppos)
 {
 	struct ath10k *ar = file->private_data;
-	char buf[32];
-	ssize_t len;
 	u32 mask;
+	int ret;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-
-	buf[len] = '\0';
-	if (kstrtoint(buf, 0, &mask))
-		return -EINVAL;
+	ret = kstrtouint_from_user(user_buf, count, 0, &mask);
+	if (ret)
+		return ret;
 
 	ar->sta_tid_stats_mask = mask;
 
-	return len;
+	return count;
 }
 
 static const struct file_operations fops_sta_tid_stats_mask = {
diff --git a/drivers/net/wireless/ath/ath10k/spectral.c b/drivers/net/wireless/ath/ath10k/spectral.c
index 68254a967ccb..2240994390ed 100644
--- a/drivers/net/wireless/ath/ath10k/spectral.c
+++ b/drivers/net/wireless/ath/ath10k/spectral.c
@@ -384,16 +384,11 @@ static ssize_t write_file_spectral_count(struct file *file,
 {
 	struct ath10k *ar = file->private_data;
 	unsigned long val;
-	char buf[32];
-	ssize_t len;
-
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
+	ssize_t ret;
 
-	buf[len] = '\0';
-	if (kstrtoul(buf, 0, &val))
-		return -EINVAL;
+	ret = kstrtoul_from_user(user_buf, count, 0, &val);
+	if (ret)
+		return ret;
 
 	if (val > 255)
 		return -EINVAL;
@@ -440,16 +435,11 @@ static ssize_t write_file_spectral_bins(struct file *file,
 {
 	struct ath10k *ar = file->private_data;
 	unsigned long val;
-	char buf[32];
-	ssize_t len;
-
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
+	ssize_t ret;
 
-	buf[len] = '\0';
-	if (kstrtoul(buf, 0, &val))
-		return -EINVAL;
+	ret = kstrtoul_from_user(user_buf, count, 0, &val);
+	if (ret)
+		return ret;
 
 	if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS)
 		return -EINVAL;
-- 
2.41.0