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authorJan Kiszka <jan.kiszka@siemens.com>2018-08-26 19:49:32 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-18 15:22:15 +0200
commite0bf2d4982fe7d9ddaf550dd023803ea286f47fc (patch)
tree26027cba68693f2a4c197ff8c67df69ede339314 /drivers/tty/serial/mvebu-uart.c
parent7876320f88802b22d4e2daf7eb027dd14175a0f8 (diff)
downloadlinux-e0bf2d4982fe7d9ddaf550dd023803ea286f47fc.tar.bz2
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.c1
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);