Re: [PATCH 4.9/4.14] serial: mvebu-uart: Fix reporting of effective CSIZE to userspace

On Mon, Oct 01, 2018 at 09:24:11AM +0200, Jan Kiszka wrote:

From: Jan Kiszka jan.kiszka@siemens.com

Commit e0bf2d4982fe7d9ddaf550dd023803ea286f47fc upstream.

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

drivers/tty/serial/mvebu-uart.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

Now applied, thanks.

greg k-h