2ed2b8621b
commitbbeddf52ad("printk: move braille console support into separate braille.[ch] files") introduced _braille_console_setup() to outline the braille initialization code. There was however some confusion over the value it was supposed to return. commit2cfe6c4ac7("printk: Fix return of braille_register_console()") tried to fix it but failed to. This fixes and documents the returned value according to the use in printk.c: non-zero return means a parsing error, and thus this console configuration should be ignored. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Aleksey Makarov <aleksey.makarov@linaro.org> Cc: Joe Perches <joe@perches.com> Cc: Ming Lei <ming.lei@canonical.com> Cc: Steven Rostedt <rostedt@goodmis.org> Acked-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
50 lines
965 B
C
50 lines
965 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/errno.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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int _braille_console_setup(char **str, char **brl_options)
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{
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if (!strncmp(*str, "brl,", 4)) {
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*brl_options = "";
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*str += 4;
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} else if (!strncmp(*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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return -EINVAL;
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}
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*((*str)++) = 0;
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}
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return 0;
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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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