[PATCH 08/10] wifi: rtw88: fix incorrect error codes in rtw_debugfs_set_fix_rate

[Zhang Shurong]

If there is a failure during copy_from_user, rtw_debugfs_set_fix_rate
should return negative error code instead of a positive value count.

Fix this bug by returning correct error code.

Signed-off-by: Zhang Shurong <zhang_shurong@xxxxxxxxxxx>
---
 drivers/net/wireless/realtek/rtw88/debug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c
index e033077d49b0..aef43f3ca364 100644
--- a/drivers/net/wireless/realtek/rtw88/debug.c
+++ b/drivers/net/wireless/realtek/rtw88/debug.c
@@ -488,7 +488,9 @@ static ssize_t rtw_debugfs_set_fix_rate(struct file *filp,
 	char tmp[32 + 1];
 	int ret;
 
-	rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 1);
+	ret = rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 1);
+	if (ret < 0)
+		return ret;
 
 	ret = kstrtou8(tmp, 0, &fix_rate);
 	if (ret) {
-- 
2.40.0