From: <gregkh@linuxfoundation.org>
To: samuel.thibault@ens-lyon.org, aleksey.makarov@linaro.org,
alexander.levin@microsoft.com, gregkh@linuxfoundation.org,
joe@perches.com, ming.lei@canonical.com, pmladek@suse.com,
rostedt@goodmis.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "braille-console: Fix value returned by _braille_console_setup" has been added to the 3.18-stable tree
Date: Mon, 19 Mar 2018 10:12:57 +0100 [thread overview]
Message-ID: <152145077720294@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
braille-console: Fix value returned by _braille_console_setup
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
braille-console-fix-value-returned-by-_braille_console_setup.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Mon Mar 19 10:11:52 CET 2018
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 26 Mar 2017 22:47:36 +0200
Subject: braille-console: Fix value returned by _braille_console_setup
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
[ Upstream commit 2ed2b8621be2708c0f6d61fe9841e9ad8b9753f0 ]
commit bbeddf52adc1 ("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. commit 2cfe6c4ac7ee
("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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/printk/braille.c | 15 ++++++++-------
kernel/printk/braille.h | 13 ++++++++++---
2 files changed, 18 insertions(+), 10 deletions(-)
--- a/kernel/printk/braille.c
+++ b/kernel/printk/braille.c
@@ -2,12 +2,13 @@
#include <linux/kernel.h>
#include <linux/console.h>
+#include <linux/errno.h>
#include <linux/string.h>
#include "console_cmdline.h"
#include "braille.h"
-char *_braille_console_setup(char **str, char **brl_options)
+int _braille_console_setup(char **str, char **brl_options)
{
if (!memcmp(*str, "brl,", 4)) {
*brl_options = "";
@@ -15,14 +16,14 @@ char *_braille_console_setup(char **str,
} else if (!memcmp(str, "brl=", 4)) {
*brl_options = *str + 4;
*str = strchr(*brl_options, ',');
- if (!*str)
+ if (!*str) {
pr_err("need port name after brl=\n");
- else
- *((*str)++) = 0;
- } else
- return NULL;
+ return -EINVAL;
+ }
+ *((*str)++) = 0;
+ }
- return *str;
+ return 0;
}
int
--- a/kernel/printk/braille.h
+++ b/kernel/printk/braille.h
@@ -9,7 +9,14 @@ braille_set_options(struct console_cmdli
c->brl_options = brl_options;
}
-char *
+/*
+ * Setup console according to braille options.
+ * Return -EINVAL on syntax error, 0 on success (or no braille option was
+ * actually given).
+ * Modifies str to point to the serial options
+ * Sets brl_options to the parsed braille options.
+ */
+int
_braille_console_setup(char **str, char **brl_options);
int
@@ -25,10 +32,10 @@ braille_set_options(struct console_cmdli
{
}
-static inline char *
+static inline int
_braille_console_setup(char **str, char **brl_options)
{
- return NULL;
+ return 0;
}
static inline int
Patches currently in stable-queue which might be from samuel.thibault@ens-lyon.org are
queue-3.18/braille-console-fix-value-returned-by-_braille_console_setup.patch
reply other threads:[~2018-03-19 9:14 UTC|newest]
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