[PATCH] wifi: mt76: mt7915: simplify mt7915_sys_recovery_set()

[Dmitry Antipov <dmantipov@yandex.ru>]

Simplify 'mt7915_sys_recovery_set()' by using
the convenient 'kstrtou16_from_user()'.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
---
 .../wireless/mediatek/mt76/mt7915/debugfs.c   | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index 4d0854fe785b..4e9dd9f65e2f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -52,23 +52,12 @@ mt7915_sys_recovery_set(struct file *file, const char __user *user_buf,
 	struct mt7915_phy *phy = file->private_data;
 	struct mt7915_dev *dev = phy->dev;
 	bool band = phy->mt76->band_idx;
-	char buf[16];
-	int ret = 0;
+	int ret;
 	u16 val;
 
-	if (count >= sizeof(buf))
-		return -EINVAL;
-
-	if (copy_from_user(buf, user_buf, count))
-		return -EFAULT;
-
-	if (count && buf[count - 1] == '\n')
-		buf[count - 1] = '\0';
-	else
-		buf[count] = '\0';
-
-	if (kstrtou16(buf, 0, &val))
-		return -EINVAL;
+	ret = kstrtou16_from_user(user_buf, count, 0, &val);
+	if (ret)
+		return ret;
 
 	switch (val) {
 	/*
-- 
2.55.0