diff mbox series

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

Message ID tencent_0560341E420A95A81E12CC3712B5305B0508@qq.com (mailing list archive)
State Changes Requested
Delegated to: Kalle Valo
Headers show
Series [01/10] wifi: rtw88: fix incorrect error codes in rtw_debugfs_set_write_reg | expand

Commit Message

Zhang Shurong April 22, 2023, 10:04 a.m. UTC 
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@foxmail.com>
---
 drivers/net/wireless/realtek/rtw88/debug.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

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],