ae6c33ba6e
Commitbbeddf52ad("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:bbeddf52ad("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>
50 lines
948 B
C
50 lines
948 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 (!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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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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