diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2018-08-26 19:49:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-18 15:22:15 +0200 |
| commit | e0bf2d4982fe7d9ddaf550dd023803ea286f47fc (patch) | |
| tree | 26027cba68693f2a4c197ff8c67df69ede339314 /drivers/tty/serial/mvebu-uart.c | |
| parent | Linux 4.19-rc4 (diff) | |
| download | linux-e0bf2d4982fe7d9ddaf550dd023803ea286f47fc.tar.xz linux-e0bf2d4982fe7d9ddaf550dd023803ea286f47fc.zip | |
serial: mvebu-uart: Fix reporting of effective CSIZE to userspace
Apparently, this driver (or the hardware) does not support character
length settings. It's apparently running in 8-bit mode, but it makes
userspace believe it's in 5-bit mode. That makes tcsetattr with CS8
incorrectly fail, breaking e.g. getty from busybox, thus the login shell
on ttyMVx.
Fix by hard-wiring CS8 into c_cflag.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Fixes: 30530791a7a0 ("serial: mvebu-uart: initial support for Armada-3700 serial port")
Cc: stable <stable@vger.kernel.org> # 4.6+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/mvebu-uart.c')
| -rw-r--r-- | drivers/tty/serial/mvebu-uart.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index d04b5eeea3c6..170e446a2f62 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -511,6 +511,7 @@ static void mvebu_uart_set_termios(struct uart_port *port, termios->c_iflag |= old->c_iflag & ~(INPCK | IGNPAR); termios->c_cflag &= CREAD | CBAUD; termios->c_cflag |= old->c_cflag & ~(CREAD | CBAUD); + termios->c_cflag |= CS8; } spin_unlock_irqrestore(&port->lock, flags); |