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sparc: Really fix "console=" for serial consoles. 

If a video head and keyboard are hooked up, specifying "console=ttyS0"
or similar to use a serial console will not work properly.

The key issue is that we must register all serial console capable
devices with register_console(), otherwise the command line specified
device won't be found.  The sun serial drivers would only register
themselves as console devices if the OpenFirmware specified console
device node matched.  To fix this part we now unconditionally get
the serial console register by setting serial_drv->cons always.

Secondarily we must not add_preferred_console() using the firmware
provided console setting if the user gaven an override on the kernel
command line using "console="  The "primary framebuffer" matching
logic was always triggering o n openfirmware device node match, make
it not when a command line override was given.

Reported-by: Frans Pop <elendil@planet.nl>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2010-08-15 00:26:14 -07:00
parent 2dc4ec5de0
commit 0a492896ac
2 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/sparc/include/asm/fb.h
View File

@ -1,5 +1,6 @@
#ifndef _SPARC_FB_H_
#define _SPARC_FB_H_
#include <linux/console.h>
#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>
@ -18,6 +19,9 @@ static inline int fb_is_primary_device(struct fb_info *info)
struct device *dev = info->device;
struct device_node *node;
if (console_set_on_cmdline)
return 0;
node = dev->of_node;
if (node &&
node == of_console_device)

13
drivers/serial/suncore.c
View File

@ -55,7 +55,12 @@ EXPORT_SYMBOL(sunserial_unregister_minors);
int sunserial_console_match(struct console *con, struct device_node *dp,
struct uart_driver *drv, int line, bool ignore_line)
{
if (!con || of_console_device != dp)
if (!con)
return 0;
drv->cons = con;
if (of_console_device != dp)
return 0;
if (!ignore_line) {
@ -69,12 +74,10 @@ int sunserial_console_match(struct console *con, struct device_node *dp,
return 0;
}
if (!console_set_on_cmdline) {
con->index = line;
drv->cons = con;
if (!console_set_on_cmdline)
add_preferred_console(con->name, line, NULL);
}
return 1;
}
EXPORT_SYMBOL(sunserial_console_match);