This is a note to let you know that I've just added the patch titled
printk/console: Split out code that enables default console
to the 5.10-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:
printk-console-split-out-code-that-enables-default-c.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1d851aeec58846f44f18d3675fd9d910969eb6f6
Author: Petr Mladek <pmladek@xxxxxxxx>
Date: Mon Nov 22 14:26:45 2021 +0100
printk/console: Split out code that enables default console
[ Upstream commit ed758b30d541e9bf713cd58612a4414e57dc6d73 ]
Put the code enabling a console by default into a separate function
called try_enable_default_console().
Rename try_enable_new_console() to try_enable_preferred_console() to
make the purpose of the different variants more clear.
It is a code refactoring without any functional change.
Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211122132649.12737-2-pmladek@xxxxxxxx
Stable-dep-of: 801410b26a0e ("serial: Lock console when calling into driver before registration")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 17a310dcb6d96..632d6d5dcfa70 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2693,7 +2693,8 @@ early_param("keep_bootcon", keep_bootcon_setup);
* Care need to be taken with consoles that are statically
* enabled such as netconsole
*/
-static int try_enable_new_console(struct console *newcon, bool user_specified)
+static int try_enable_preferred_console(struct console *newcon,
+ bool user_specified)
{
struct console_cmdline *c;
int i, err;
@@ -2741,6 +2742,23 @@ static int try_enable_new_console(struct console *newcon, bool user_specified)
return -ENOENT;
}
+/* Try to enable the console unconditionally */
+static void try_enable_default_console(struct console *newcon)
+{
+ if (newcon->index < 0)
+ newcon->index = 0;
+
+ if (newcon->setup && newcon->setup(newcon, NULL) != 0)
+ return;
+
+ newcon->flags |= CON_ENABLED;
+
+ if (newcon->device) {
+ newcon->flags |= CON_CONSDEV;
+ has_preferred_console = true;
+ }
+}
+
/*
* The console driver calls this routine during kernel initialization
* to register the console printing procedure with printk() and to
@@ -2797,25 +2815,15 @@ void register_console(struct console *newcon)
* didn't select a console we take the first one
* that registers here.
*/
- if (!has_preferred_console) {
- if (newcon->index < 0)
- newcon->index = 0;
- if (newcon->setup == NULL ||
- newcon->setup(newcon, NULL) == 0) {
- newcon->flags |= CON_ENABLED;
- if (newcon->device) {
- newcon->flags |= CON_CONSDEV;
- has_preferred_console = true;
- }
- }
- }
+ if (!has_preferred_console)
+ try_enable_default_console(newcon);
/* See if this console matches one we selected on the command line */
- err = try_enable_new_console(newcon, true);
+ err = try_enable_preferred_console(newcon, true);
/* If not, try to match against the platform default(s) */
if (err == -ENOENT)
- err = try_enable_new_console(newcon, false);
+ err = try_enable_preferred_console(newcon, false);
/* printk() messages are not printed to the Braille console. */
if (err || newcon->flags & CON_BRL)
