On Wednesday 26 August 2015 06:14 PM, Peter Hurley wrote:

On 08/14/2015 12:01 PM, Sebastian Andrzej Siewior wrote:

quoted

The function tty_insert_flip_string() returns an int and as such it
might fail. So the result is that I kindly asked to insert 48 bytes and
the function only insterted 32.
I have no idea what to do with the remaining 16 so I think dropping them
is the only option. I also increase the buf_overrun counter so userpace
has a clue that we lost bytes.

No objection to the patch but I'm curious whether this is something you've
actually observed and under what circumstances.

This was observed while doing a UART internal loopback test at 3Mbaud on
TI's DRA7 EVM.

Thanks,
Sekhar