mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
35c35493b0
strncmp(str, const, len) is error-prone because len is easy to have typo. An example is the hard-coded len has counting error or sizeof(const) forgets - 1. So we prefer using newly introduced str_has_prefix() to substitute such strncmp() to make code better. Link: http://lkml.kernel.org/r/20190809071034.17279-1-hslester96@gmail.com Cc: "Steven Rostedt" <rostedt@goodmis.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> [pmladek@suse.com: Slightly updated and reformatted the commit message.] Signed-off-by: Petr Mladek <pmladek@suse.com>
58 lines
1 KiB
C
58 lines
1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/console.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
|
|
#include "console_cmdline.h"
|
|
#include "braille.h"
|
|
|
|
int _braille_console_setup(char **str, char **brl_options)
|
|
{
|
|
size_t len;
|
|
|
|
len = str_has_prefix(*str, "brl,");
|
|
if (len) {
|
|
*brl_options = "";
|
|
*str += len;
|
|
return 0;
|
|
}
|
|
|
|
len = str_has_prefix(*str, "brl=");
|
|
if (len) {
|
|
*brl_options = *str + len;
|
|
*str = strchr(*brl_options, ',');
|
|
if (!*str) {
|
|
pr_err("need port name after brl=\n");
|
|
return -EINVAL;
|
|
}
|
|
*((*str)++) = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_braille_register_console(struct console *console, struct console_cmdline *c)
|
|
{
|
|
int rtn = 0;
|
|
|
|
if (c->brl_options) {
|
|
console->flags |= CON_BRL;
|
|
rtn = braille_register_console(console, c->index, c->options,
|
|
c->brl_options);
|
|
}
|
|
|
|
return rtn;
|
|
}
|
|
|
|
int
|
|
_braille_unregister_console(struct console *console)
|
|
{
|
|
if (console->flags & CON_BRL)
|
|
return braille_unregister_console(console);
|
|
|
|
return 0;
|
|
}
|