PM: Wait for console in resume

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@google.com>
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/power/console.c b/kernel/power/console.c
index b8628be2a465c4841ccc69135d91618b56b2d6ca..a3961b205de743c30f9588e02d28f1f959b46db6 100644 (file)
--- a/kernel/power/console.c
+++ b/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