Commit 72c96a2d authored by Marcos Paulo de Souza's avatar Marcos Paulo de Souza Committed by Petr Mladek
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printk: Check CON_SUSPEND when unblanking a console 



The commit 9e70a5e1 ("printk: Add per-console suspended state")
introduced the CON_SUSPENDED flag for consoles. The suspended consoles
will stop receiving messages, so don't unblank suspended consoles
because it won't be showing anything either way.

Signed-off-by: default avatarMarcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.com>
Reviewed-by: default avatarJohn Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20250226-printk-renaming-v1-5-0b878577f2e6@suse.com


Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
parent 5395e09c

kernel/printk/printk.c

+12 −2
Original line number Diff line number Diff line
@@ -3342,7 +3342,12 @@ void console_unblank(void) 
	 */

	cookie = console_srcu_read_lock();

	for_each_console_srcu(c) {

		if ((console_srcu_read_flags(c) & CON_ENABLED) && c->unblank) {

		short flags = console_srcu_read_flags(c);



		if (flags & CON_SUSPENDED)

			continue;



		if ((flags & CON_ENABLED) && c->unblank) {

			found_unblank = true;

			break;

		}
@@ -3379,7 +3384,12 @@ void console_unblank(void) 


	cookie = console_srcu_read_lock();

	for_each_console_srcu(c) {

		if ((console_srcu_read_flags(c) & CON_ENABLED) && c->unblank)

		short flags = console_srcu_read_flags(c);



		if (flags & CON_SUSPENDED)

			continue;



		if ((flags & CON_ENABLED) && c->unblank)

			c->unblank();

	}

	console_srcu_read_unlock(cookie);