[PATCH v2 13/13] tty: pruss SUART driver

[Alan Cox]

> I tried using a tasklet for the TX part, but that did not help.
> Another way is to prepare the buffer for the next read and read the data 
> immediately.
> Something like this:
> 
> 1. Call tty_prepare_flip_string while startup.
> 2. When the read interrupt arrives, read the data immediately.
> 3. Call tty_prepare_flip_string for the next read.

Only you then don't know the size of space required/

> Again, the problem here is that we need to use global variables to store the 
> pre-allocated buffers

You don't. You can store them per port in the existing objects !

> The best way is if we can keep the current implementation, one extra copy is 
> not hurting us
> as we do it after the read_data API.

No problem with that at all.