From: Marcos Paulo de Souza mpdesouza@suse.com
[ Upstream commit 72c96a2dacc0fb056d13a5f02b0845c4c910fe54 ]
The commit 9e70a5e109a4 ("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: Marcos Paulo de Souza mpdesouza@suse.com Reviewed-by: Petr Mladek pmladek@suse.com Reviewed-by: John Ogness john.ogness@linutronix.de Link: https://lore.kernel.org/r/20250226-printk-renaming-v1-5-0b878577f2e6@suse.co... Signed-off-by: Petr Mladek pmladek@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/printk/printk.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 881a26e18c658..3a91b739e8f30 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -3310,7 +3310,12 @@ 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; } @@ -3347,7 +3352,12 @@ 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);