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| author | Alan Cox <alan@linux.intel.com> | 2010-01-04 16:26:21 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-01-20 15:03:29 -0800 |
| commit | 16ae2a877bf4179737921235e85ceffd7b79354f (patch) | |
| tree | 48a72ef071d1c89dc6d49aa88bb3ee98af6ce7ad | |
| parent | 4547be7809a3b775ce750ec7f8b5748954741523 (diff) | |
| download | linux-stable-16ae2a877bf4179737921235e85ceffd7b79354f.tar.gz linux-stable-16ae2a877bf4179737921235e85ceffd7b79354f.tar.bz2 linux-stable-16ae2a877bf4179737921235e85ceffd7b79354f.zip | |
serial: Fix crash if the minimum rate of the device is > 9600 baud
In that situation if the old rate is invalid and the new rate is invalid
and the chip cannot do 9600 baud we report zero, which makes all the
drivers explode.
Instead force the rate based on min/max
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/serial/serial_core.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index fa4f170f2e86..7f2830709512 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -385,13 +385,20 @@ uart_get_baud_rate(struct uart_port *port, struct ktermios *termios, } /* - * As a last resort, if the quotient is zero, - * default to 9600 bps + * As a last resort, if the range cannot be met then clip to + * the nearest chip supported rate. */ - if (!hung_up) - tty_termios_encode_baud_rate(termios, 9600, 9600); + if (!hung_up) { + if (baud <= min) + tty_termios_encode_baud_rate(termios, + min + 1, min + 1); + else + tty_termios_encode_baud_rate(termios, + max - 1, max - 1); + } } - + /* Should never happen */ + WARN_ON(1); return 0; } |