linux-kernel - [PATCH 8/9] PM: Wait for console in resume

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Message-Id: <200902140206.18505.rjw@sisk.pl>
Date:	Sat, 14 Feb 2009 02:06:17 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Len Brown <lenb@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Greg KH <gregkh@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Johannes Weiner <hannes@...xchg.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Andrey Borzenkov <arvidjaar@...l.ru>
Subject: [PATCH 8/9] PM: Wait for console in resume

From: Arve Hjønnevåg <arve@...roid.com>

Avoids later waking up to a blinking cursor if the device woke up and
returned to sleep before the console switch happened.

Signed-off-by: Brian Swetland <swetland@...gle.com>
Signed-off-by: Arve Hjønnevåg <arve@...roid.com>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---

 kernel/power/console.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-2.6/kernel/power/console.c
===================================================================
--- linux-2.6.orig/kernel/power/console.c
+++ linux-2.6/kernel/power/console.c
@@ -78,6 +78,12 @@ void pm_restore_console(void)
 	}
 	set_console(orig_fgconsole);
 	release_console_sem();
+
+	if (vt_waitactive(orig_fgconsole)) {
+		pr_debug("Resume: Can't switch VCs.");
+		return;
+	}
+
 	kmsg_redirect = orig_kmsg;
 }
 #endif
--
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