forked from Minki/linux
2cfe6c4ac7
Some of my configs I test with have CONFIG_A11Y_BRAILLE_CONSOLE set.
When I started testing against v3.11-rc4 my console went bonkers. Using
ktest to bisect the issue, it came down to:
commit bbeddf52a "printk: move braille console support into separate
braille.[ch] files"
Looking into the patch I found the problem. It's with the return of
braille_register_console(). As anything other than NULL is considered a
failure.
But for those of us that have CONFIG_A11Y_BRAILLE_CONSOLE set but do not
define a "brl" or "brl=" on the command line, we still may want a
console that those with sight can still use.
Return NULL (success) if "brl" or "brl=" is not on the console line.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
50 lines
945 B
C
50 lines
945 B
C
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/console.h>
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#include <linux/string.h>
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#include "console_cmdline.h"
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#include "braille.h"
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char *_braille_console_setup(char **str, char **brl_options)
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{
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if (!memcmp(*str, "brl,", 4)) {
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*brl_options = "";
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*str += 4;
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} else if (!memcmp(str, "brl=", 4)) {
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*brl_options = *str + 4;
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*str = strchr(*brl_options, ',');
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if (!*str)
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pr_err("need port name after brl=\n");
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else
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*((*str)++) = 0;
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} else
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return NULL;
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return *str;
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}
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int
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_braille_register_console(struct console *console, struct console_cmdline *c)
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{
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int rtn = 0;
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if (c->brl_options) {
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console->flags |= CON_BRL;
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rtn = braille_register_console(console, c->index, c->options,
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c->brl_options);
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}
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return rtn;
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}
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int
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_braille_unregister_console(struct console *console)
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{
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if (console->flags & CON_BRL)
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return braille_unregister_console(console);
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return 0;
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}
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