diff options
| author | Johan Hovold <johan@kernel.org> | 2021-04-07 11:52:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 09:44:22 +0200 |
| commit | 77a1c15145c8b3459f3f7361cadd111d6624b349 (patch) | |
| tree | 00febb9fe621b30cc407354019f9a8b8fabb4f41 | |
| parent | b6803d57f587f0387ddadd57b27660643340a049 (diff) | |
serial: core: return early on unsupported ioctls
[ Upstream commit 79c5966cec7b148199386ef9933c31b999379065 ]
Drivers can return -ENOIOCTLCMD when an ioctl is not recognised to tell
the upper layers to continue looking for a handler.
This is not the case for the RS485 and ISO7816 ioctls whose handlers
should return -ENOTTY directly in case a serial driver does not
implement the corresponding methods.
Fixes: a5f276f10ff7 ("serial_core: Handle TIOC[GS]RS485 ioctls.")
Fixes: ad8c0eaa0a41 ("tty/serial_core: add ISO7816 infrastructure")
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210407095208.31838-9-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index ad262349703b..e2ab6524119a 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1304,7 +1304,7 @@ static int uart_set_rs485_config(struct uart_port *port, unsigned long flags; if (!port->rs485_config) - return -ENOIOCTLCMD; + return -ENOTTY; if (copy_from_user(&rs485, rs485_user, sizeof(*rs485_user))) return -EFAULT; @@ -1328,7 +1328,7 @@ static int uart_get_iso7816_config(struct uart_port *port, struct serial_iso7816 aux; if (!port->iso7816_config) - return -ENOIOCTLCMD; + return -ENOTTY; spin_lock_irqsave(&port->lock, flags); aux = port->iso7816; @@ -1348,7 +1348,7 @@ static int uart_set_iso7816_config(struct uart_port *port, unsigned long flags; if (!port->iso7816_config) - return -ENOIOCTLCMD; + return -ENOTTY; if (copy_from_user(&iso7816, iso7816_user, sizeof(*iso7816_user))) return -EFAULT; |