Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used

> It works fine. The only problem is that if I set a _standard_ baud rate
> with BOTHER and then read it back with something that doesn't grok
> BOTHER, I get it back just as I set it.

That seemed to me to be the right thing to do.

> It might be better if it was returning B38400, rather than BOTHER.
> Should we be using tty_termios_encode_baud_rate() for TCGETS()?

You can't really do that as you get weird behaviour then when people do

	tcgetattr
		|= BOTHER;
		speed = 19200;
	tcsetattr

later in the same app

	tcgetattr
		speed = 38400
	tcsetattr

knowing that they set BOTHER already.

I guess you could add both ioctl sets anyway but the plan longer term is
for glibc tcsetattr/getattr to do the right thing with the new ioctls in
all cases, as the glibc interface already provides speed fields.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: David Woodhouse <[email protected]>

• References:
  • [PATCH] ARM/ARM26: Enable arbitary speed tty ioctls and split input/output speed
    • From: Alan Cox <[email protected]>
  • Re: [PATCH] $ARCH: Enable arbitary speed tty ioctls and split input/output speed
    • From: David Woodhouse <[email protected]>
  • Re: [PATCH] $ARCH: Enable arbitary speed tty ioctls and split input/output speed
    • From: Alan Cox <[email protected]>
  • Re: [PATCH] $ARCH: Enable arbitary speed tty ioctls and split input/output speed
    • From: David Woodhouse <[email protected]>
  • Re: [PATCH] $ARCH: Enable arbitary speed tty ioctls and split input/output speed
    • From: Alan Cox <[email protected]>
  • [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: David Woodhouse <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: Alan Cox <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: David Woodhouse <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: Alan Cox <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: David Woodhouse <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: Alan Cox <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: David Woodhouse <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: Alan Cox <[email protected]>
  • Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
    • From: David Woodhouse <[email protected]>

• Prev by Date: Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used (v2)
• Next by Date: Re: Kernel 2.6.22-rc4 netconsole & syslogd bug
• Previous by thread: Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
• Next by thread: Re: [SERIAL] Don't optimise away baud rate changes when BOTHER is used
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]