Re: [uClinux-dev] Re: Fix support for console port other than ttyS0on mcf.c

From: Greg Ungerer
Date: Wed Feb 04 2009 - 19:24:29 EST




Geert Uytterhoeven wrote:
On Wed, 4 Feb 2009, Lennart Sorensen wrote:
Perhaps CCing linux-m68k@xxxxxxxxxxxxxxxxxxxx would be a good idea.

Thanks, but this is a uClinux driver.

I have commited this to the m68knommu git tree on kernel.org.

Thanks
Greg



On Wed, Feb 04, 2009 at 03:15:18PM -0500, Lennart Sorensen wrote:
Due to a case of backwards logic, mfc.c always makes the console port be
ttyS0 even when you ask for another port.

This patch fixes this issue.

Only when the requested port is NOT in the range 0 to MAXPORTS-1 do we
force it to be treated as if port 0 was requested. Forcing the port to
0 when it is in fact in the range 0 to MAXPORTS is not helpful.

Tested with working console on ttyS2 on a 5271evb.

Signed-off-by: Len Sorensen <lsorense@xxxxxxxxxxxxxxxxxxx>

diff --git a/drivers/serial/mcf.c b/drivers/serial/mcf.c
index 56841fe..0eefb07 100644
--- a/drivers/serial/mcf.c
+++ b/drivers/serial/mcf.c
@@ -513,7 +513,7 @@ static int __init mcf_console_setup(struct console *co, char *options)
int parity = 'n';
int flow = 'n';

- if ((co->index >= 0) && (co->index <= MCF_MAXPORTS))
+ if ((co->index < 0) || (co->index >= MCF_MAXPORTS))
co->index = 0;
port = &mcf_ports[co->index].port;
if (port->membase == 0)

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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