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Message-ID: <20080220204117.2fb5c646@core> Date: Wed, 20 Feb 2008 20:41:17 +0000 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: akpm@...l.org, linux-kernel@...r.kernel.org Subject: [PATCH] Fix tty speed handling on 8250 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@...hat.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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