On Thu, 19 May 2011 11:05:49 -0500 Timur Tabi <ti...@freescale.com> wrote:
> Alan Cox wrote: > >> > + /* Pass the received data to the tty layer. Note that > >> > this > >> > + * function calls tty_buffer_request_room(), so I'm not > >> > sure if > >> > + * we should have also called tty_buffer_request_room(). > >> > + */ > >> > + ret = tty_insert_flip_string(ttys, buffer, len); > > > You only need to request_room in advance if you can't handle the case > > where the insert_flip_string returns less than you stuffed down it. > > If tty_insert_flip_string() returns less than I stuffed down it, the > characters > it didn't accept will be dropped. That's because once I receive them, I have > nowhere else to put them. I suppose I could implement a receive FIFO, but > that > seems overkill. If calling tty_buffer_request_room() ensures that > tty_insert_flip_string() always accepts all the characters, I would rather do > that. I was answering the question in the comment in the code... _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
