Messages in this thread Patch in this message | | | Date | Wed, 20 Feb 2008 20:41:17 +0000 | From | Alan Cox <> | Subject | [PATCH] Fix tty speed handling on 8250 |
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We try and write the correct speed back but the serial midlayer already mangles the speed on us and that means if we request B0 we report back B9600 when we should not. For now we'll hack around this in the drivers and serial code, pending a better long term solution.
Signed-off-by: Alan Cox <alan@redhat.com>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc2-mm1/drivers/serial/8250.c linux-2.6.25-rc2-mm1/drivers/serial/8250.c --- linux.vanilla-2.6.25-rc2-mm1/drivers/serial/8250.c 2008-02-19 11:03:01.000000000 +0000 +++ linux-2.6.25-rc2-mm1/drivers/serial/8250.c 2008-02-20 16:31:16.000000000 +0000 @@ -2174,7 +2174,9 @@ } serial8250_set_mctrl(&up->port, up->port.mctrl); spin_unlock_irqrestore(&up->port.lock, flags); - tty_termios_encode_baud_rate(termios, baud, baud); + /* Don't rewrite B0 */ + if (tty_termios_baud_rate(termios)) + tty_termios_encode_baud_rate(termios, baud, baud); } static void
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