On Wed, Dec 30, 2020 at 08:39:06PM +0800, [email protected] wrote: > From: Qiumiao Zhang <[email protected]> > > Because serial port is low-speed device, serial port writing will be suspended > when the buffer of driver layer is full due to serial port aging. The concrete > representation is n_tty_write blocking in the process of wait_woken, the > process > of writing serial port exists without feedback, and becomes a zombie process. > So for serial port, set the timeout value of wait_woken function to 60s. Wake > up > and flush the buffer after timeout. > > Signed-off-by: Qiumiao Zhang <[email protected]> > --- > drivers/tty/n_tty.c | 15 ++++++++++++++- > 1 file changed, 14 insertions(+), 1 deletion(-)
What changed from v1? Always put that below the --- line as the documentation asks you to do so. Please fix up and submit a v3. thanks, greg k-h
