serial: 8250_pci: fix divide error bug if baud rate is 0

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commit 6f210c18c1 upstream.

Since commit 21947ba654 ("serial: 8250_pci: replace switch-case by
formula"), the 8250 driver crashes in the byt_set_termios() function
with a divide error. This is caused by the fact that a baud rate of 0 (B0)
is not handled properly. Fix it by falling back to B9600 in this case.

Signed-off-by: David Müller <d.mueller@elsoft.ch>
Fixes: 21947ba654 ("serial: 8250_pci: replace switch-case by formula")
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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David Müller 2016-04-27 11:58:32 +02:00 • committed by Greg Kroah-Hartman

parent 71378785b6

commit 1401ebda89

1 changed files with 3 additions and 0 deletions

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drivers/tty/serial/8250/8250_pci.c

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