On Mon, Mar 05, 2007 at 12:09:20PM -0500, Mike Frysinger wrote: > On 3/4/07, Russell King <rmk+lkml@xxxxxxxxxxxxxxxx> wrote: > >On Thu, Mar 01, 2007 at 07:03:02PM -0500, Mike Frysinger wrote: > >> the console= bootcmd allows for controlling of the initial state of > >> flow control by adding/omitting the 'r' suffix ... > > > >The console command *only* sets the state for the kernel's use of one > >serial port. It does not affect any other serial port, so tying > >random RTS behaviours into that command line option is absolutely > >silly. > > true ... so ignoring the original motivation for change i posted, is > it really correct for the serial core to be forcing TIOCM_RTS at uart > startup even though the uart doesnt have CTSRTS flow control enabled ? > in other words, my change is agnostic of the console, and is done for > all uarts ... it should prob have a similar change in uart_shutdown() > though ... No idea - it's something that Linux has always done. Neither do I have any idea if changing it will break anyones setup. However, since I don't maintain serial anymore, I'm not about to start playing about with this trying to find out. Feel free to submit a patch to akpm to leave RTS alone when CRTSCTS is not set. I'd recommend that it sits in -mm for about 6 months to really get an idea if it breaks anything. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: - 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