On Wed, Feb 16, 2011 at 4:51 AM, Andrei Warkentin <andreiw@xxxxxxxxxxxx> wrote: > Hi, > > I looked about the archives, but maybe I skipped something... When I > am handling set_termios, what assumptions can I make regarding the > TX/RX state? I didn't take a look at all the serial drivers, but the > ones I did look did not bother flushing FIFOs and ensuring nothing can > be present in the TX FIFO while updating LCR and divisors. Should I do > the equivalent of stop_tx inside set_termios? Is that already ensured? > The hardware I am looking at needs to have FIFO cleared after setting > baud rate, and I was getting concerned over potential data loss > scenarios... > > Thanks, > A > I realize there are different versions of the TCSET - TCSETS, TCSETF... i.e. if you wanted to flush the buffer you'd ask for it. So it should be ok to just clear the FIFO and destroy anything in them, right? Or should I still flush the FIFOs after disabling flow control if it was on? After all you could have gotten data after you called set_termios. Thanks, A -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
