2013-08-01 03:53:45 +07:00
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#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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2017-03-27 03:47:36 +07:00
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#include <linux/errno.h>
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2013-08-01 03:53:45 +07:00
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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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2017-03-27 03:47:36 +07:00
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int _braille_console_setup(char **str, char **brl_options)
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2013-08-01 03:53:45 +07:00
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{
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printk: fix parsing of "brl=" option
Commit bbeddf52adc1 ("printk: move braille console support into separate
braille.[ch] files") moved the parsing of braille-related options into
_braille_console_setup(), changing the type of variable str from char*
to char**. In this commit, memcmp(str, "brl,", 4) was correctly updated
to memcmp(*str, "brl,", 4) but not memcmp(str, "brl=", 4).
Update the code to make "brl=" option work again and replace memcmp()
with strncmp() to make the compiler able to detect such an issue.
Fixes: bbeddf52adc1 ("printk: move braille console support into separate braille.[ch] files")
Link: http://lkml.kernel.org/r/20160823165700.28952-1-nicolas.iooss_linux@m4x.org
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-26 05:17:00 +07:00
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if (!strncmp(*str, "brl,", 4)) {
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2013-08-01 03:53:45 +07:00
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*brl_options = "";
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*str += 4;
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printk: fix parsing of "brl=" option
Commit bbeddf52adc1 ("printk: move braille console support into separate
braille.[ch] files") moved the parsing of braille-related options into
_braille_console_setup(), changing the type of variable str from char*
to char**. In this commit, memcmp(str, "brl,", 4) was correctly updated
to memcmp(*str, "brl,", 4) but not memcmp(str, "brl=", 4).
Update the code to make "brl=" option work again and replace memcmp()
with strncmp() to make the compiler able to detect such an issue.
Fixes: bbeddf52adc1 ("printk: move braille console support into separate braille.[ch] files")
Link: http://lkml.kernel.org/r/20160823165700.28952-1-nicolas.iooss_linux@m4x.org
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-26 05:17:00 +07:00
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} else if (!strncmp(*str, "brl=", 4)) {
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2013-08-01 03:53:45 +07:00
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*brl_options = *str + 4;
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*str = strchr(*brl_options, ',');
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2017-03-27 03:47:36 +07:00
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if (!*str) {
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2013-08-01 03:53:45 +07:00
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pr_err("need port name after brl=\n");
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2017-03-27 03:47:36 +07:00
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return -EINVAL;
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}
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*((*str)++) = 0;
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}
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2013-08-01 03:53:45 +07:00
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2017-03-27 03:47:36 +07:00
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return 0;
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2013-08-01 03:53:45 +07:00
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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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