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Message-ID: <471543C3.3050502@tiscali.nl>
Date: Wed, 17 Oct 2007 01:05:39 +0200
From: Roel Kluin <12o3l@...cali.nl>
To: "Maciej W. Rozycki" <macro@...ux-mips.org>
CC: Andrew Morton <akpm@...ux-foundation.org>,
linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty_ioctl: Fix the baud_table check in encode_baud_rate
Since you were sending a fix, possibly I shouldn't comment on this. If so please disregard my
suggestion for a trivial cleanup.
Roel
Maciej W. Rozycki wrote:
> +void tty_termios_encode_baud_rate(struct ktermios *termios,
> + speed_t ibaud, speed_t obaud)
> {
> int i = 0;
> int ifound = -1, ofound = -1;
> @@ -251,12 +252,15 @@ void tty_termios_encode_baud_rate(struct
> termios->c_cflag &= ~CBAUD;
>
> do {
> - if (obaud - oclose >= baud_table[i] && obaud + oclose <= baud_table[i]) {
> + if (obaud - oclose <= baud_table[i] &&
> + obaud + oclose >= baud_table[i]) {
if(a - b <= c && a + b >= c)
if(a <= c + b && a + b >= c)
if(c + b >= a && a + b >= c)
if(b >= a - c && b >= c - a)
true, if:
b >= |a - c|
so
if (oclose >= abs(obaud - baud_table[i])) {
should work as well
> termios->c_cflag |= baud_bits[i];
> ofound = i;
> }
> - if (ibaud - iclose >= baud_table[i] && ibaud + iclose <= baud_table[i]) {
> - /* For the case input == output don't set IBAUD bits if the user didn't do so */
> + if (ibaud - iclose <= baud_table[i] &&
> + ibaud + iclose >= baud_table[i]) {
similarly,
if (iclose >= abs(ibaud - baud_table[i])) {
> + /* For the case input == output don't set IBAUD bits
> + if the user didn't do so */
> if (ofound != i || ibinput)
> termios->c_cflag |= (baud_bits[i] << IBSHIFT);
> ifound = i;
-
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