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Avoid division by zero in serial.

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This commit is contained in:
Vladimir Serbinenko 2015-01-20 20:41:36 +01:00
parent 4816dcac19
commit e95685dab1
3 changed files with 17 additions and 1 deletions
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9
grub-core/term/serial.c
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@ -220,8 +220,12 @@ grub_cmd_serial (grub_extcmd_context_t ctxt, int argc, char **args)
config = port->config;
if (state[OPTION_SPEED].set)
if (state[OPTION_SPEED].set) {
config.speed = grub_strtoul (state[OPTION_SPEED].arg, 0, 0);
if (config.speed == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("unsupported serial port parity"));
}
if (state[OPTION_WORD].set)
config.word_len = grub_strtoul (state[OPTION_WORD].arg, 0, 0);
@ -275,6 +279,9 @@ grub_cmd_serial (grub_extcmd_context_t ctxt, int argc, char **args)
config.base_clock *= 1000;
}
if (config.speed == 0)
config.speed = 9600;
/* Initialize with new settings. */
err = port->driver->configure (port, &config);
if (err)