Commit e0bf2d49 authored by Jan Kiszka's avatar Jan Kiszka Committed by Greg Kroah-Hartman

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: default avatarJan Kiszka <jan.kiszka@siemens.com>
Fixes: 30530791 ("serial: mvebu-uart: initial support for Armada-3700 serial port")
Cc: stable <stable@vger.kernel.org> # 4.6+
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7876320f
...@@ -511,6 +511,7 @@ static void mvebu_uart_set_termios(struct uart_port *port, ...@@ -511,6 +511,7 @@ static void mvebu_uart_set_termios(struct uart_port *port,
termios->c_iflag |= old->c_iflag & ~(INPCK | IGNPAR); termios->c_iflag |= old->c_iflag & ~(INPCK | IGNPAR);
termios->c_cflag &= CREAD | CBAUD; termios->c_cflag &= CREAD | CBAUD;
termios->c_cflag |= old->c_cflag & ~(CREAD | CBAUD); termios->c_cflag |= old->c_cflag & ~(CREAD | CBAUD);
termios->c_cflag |= CS8;
} }
spin_unlock_irqrestore(&port->lock, flags); spin_unlock_irqrestore(&port->lock, flags);
......
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