Messages in this thread | | | Date | Fri, 8 Jun 2007 12:42:06 +0100 | From | Alan Cox <> | Subject | Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used (v2) |
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On Fri, 08 Jun 2007 12:14:49 +0100 David Woodhouse <dwmw2@infradead.org> wrote:
> The uart_set_termios() function will bail out early without bothering to > touch the hardware, if it decides that nothing "relevant" has changed. > Unfortunately, its idea of "relevant" doesn't include c_[io]speed. So if > the baud rate bits are BOTHER and you just change the speed, the change > gets optimised away. > > This patch makes it ignore the old Bfoo bits in c_cflag and just check > whether c_ispeed and c_ospeed have changed. Those integers are always > set appropriately for us by set_termios(). > > This version of the patch lacks the debugging printk which I > accidentally left in the previous one. > > Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Alan Cox <alan@redhat.com>
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