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serial: st-asc: Don't call BUG in asc_console_setup() 

In order to prevent an asc instance to be used as early console, BUG_ON is
used on either mapbase or membase being NULL.

Problem is that this condition is also true when we set console to be a ttyASx
different to the first asc instance being probed.

Instead of calling BUG_ON, it now returns -ENXIO when either mapbase or
membase is NULL.

Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maxime COQUELIN 2014-07-24 14:02:55 +02:00 committed by Greg Kroah-Hartman
parent af300539de
commit 5b4e79ae45
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serial/st-asc.c
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@ -842,7 +842,8 @@ static int asc_console_setup(struct console *co, char *options)
* this to be called during the uart port registration when the
* driver gets probed and the port should be mapped at that point.
*/
BUG_ON(ascport->port.mapbase == 0 || ascport->port.membase == NULL);
if (ascport->port.mapbase == 0 || ascport->port.membase == NULL)
return -ENXIO;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);