[PATCH 05/10] wifi: rtw88: fix incorrect error codes in rtw_debugfs_set_h2c

[Zhang Shurong]

If there is a failure during copy_from_user, rtw_debugfs_set_h2c
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 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c
index f721205185cf..911f0514c497 100644
--- a/drivers/net/wireless/realtek/rtw88/debug.c
+++ b/drivers/net/wireless/realtek/rtw88/debug.c
@@ -393,8 +393,11 @@ static ssize_t rtw_debugfs_set_h2c(struct file *filp,
 	char tmp[32 + 1];
 	u8 param[8];
 	int num;
+	int ret;
 
-	rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 3);
+	ret = rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 3);
+	if (ret < 0)
+		return ret;
 
 	num = sscanf(tmp, "%hhx,%hhx,%hhx,%hhx,%hhx,%hhx,%hhx,%hhx",
 		     &param[0], &param[1], &param[2], &param[3],
-- 
2.40.0