[PATCH] swsusp: add check for suspension of X-controlled devices

It is unsafe to suspend devices if the hardware is controlled by X.  Add an
extra check to prevent this from happening.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0900d1dbee59..86b31b87eb85 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -3234,6 +3234,14 @@ void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
         }
 }
 
+int is_console_suspend_safe(void)
+{
+        /* It is unsafe to suspend devices while X has control of the
+         * hardware. Make sure we are running on a kernel-controlled console.
+         */
+        return vc_cons[fg_console].d->vc_mode == KD_TEXT;
+}
+
 /*
  *      Visible symbols for modules
  */