[PATCH 5/5] printk: Check CON_SUSPEND when unblanking a console

[Marcos Paulo de Souza]

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 <mpdeso...@suse.com>
---
 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 fbbaec06c9f3..4b7ed40bf808 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -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);

-- 
2.48.1