linux-kernel - [PATCH printk v2 15/18] tty: sysfs: Add nbcon support for 'active'

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Message-Id: <20240603232453.33992-16-john.ogness@linutronix.de>
Date: Tue,  4 Jun 2024 01:30:50 +0206
From: John Ogness <john.ogness@...utronix.de>
To: Petr Mladek <pmladek@...e.com>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	linux-serial@...r.kernel.org
Subject: [PATCH printk v2 15/18] tty: sysfs: Add nbcon support for 'active'

Allow the 'active' attribute to list nbcon consoles.

Signed-off-by: John Ogness <john.ogness@...utronix.de>
---
 drivers/tty/tty_io.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 407b0d87b7c1..c9c914bc033c 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -3567,8 +3567,13 @@ static ssize_t show_cons_active(struct device *dev,
 	for_each_console(c) {
 		if (!c->device)
 			continue;
-		if (!c->write)
-			continue;
+		if (c->flags & CON_NBCON) {
+			if (!c->write_atomic && !c->write_thread)
+				continue;
+		} else {
+			if (!c->write)
+				continue;
+		}
 		if ((c->flags & CON_ENABLED) == 0)
 			continue;
 		cs[i++] = c;
-- 
2.39.2