linux-kernel - [PATCH v2 1/2] USB: serial: ark3116: Remove unused TIOCSSERIAL ioctl case.

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Message-ID: <20180106201402.03d2ac88@debian>
Date:   Sat, 6 Jan 2018 20:14:02 +0300
From:   Mikhail Zaytsev <flashed@...l.ru>
To:     Johan Hovold <johan@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] USB: serial: ark3116: Remove unused TIOCSSERIAL
 ioctl case.

The patch removes unused TIOCSSERIAL ioctl case and adds the default block
to the switch. This will make the ioctl return -ENOTTY to user space (e.g.
setserial), because TIOCSSERIAL really isn't supported for these devices
currently.

Signed-off-by: Mikhail Zaytsev <flashed@...l.ru>
---
 drivers/usb/serial/ark3116.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index 23d46ef87..2e957c76f 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -418,10 +418,8 @@ static int ark3116_ioctl(struct tty_struct *tty,
 			return -EFAULT;
 
 		return 0;
-	case TIOCSSERIAL:
-		if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
-			return -EFAULT;
-		return 0;
+	default:
+		break;
 	}
 
 	return -ENOIOCTLCMD;
-- 
2.11.0