5.15-stable review patch. If anyone has any objections, please let me know.
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From: Petr Mladek pmladek@suse.com
[ 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@suse.com Reviewed-by: Sergey Senozhatsky senozhatsky@chromium.org Link: https://lore.kernel.org/r/20211122132649.12737-2-pmladek@suse.com Stable-dep-of: 801410b26a0e ("serial: Lock console when calling into driver before registration") Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/printk/printk.c | 38 +++++++++++++++++++++++--------------- 1 file changed, 23 insertions(+), 15 deletions(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 8b110b245d92c..4bef2963284af 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2888,7 +2888,8 @@ 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; @@ -2936,6 +2937,23 @@ 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 @@ -2991,25 +3009,15 @@ 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)