From: Jason Wessel Date: Mon, 16 Aug 2010 20:58:31 +0000 (-0500) Subject: vt,console,kdb: preserve console_blanked while in kdb X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=beed5336eba6a5a70c97e9f4bfff525915a25003;p=openwrt%2Fstaging%2Fblogic.git vt,console,kdb: preserve console_blanked while in kdb Commit b45cfba4e9005d64d419718e7ff7f7cab44c1994 (vt,console,kdb: implement atomic console enter/leave functions) introduced the ability to atomically change the console mode with kernel mode setting but did not preserve the state of the console_blanked variable. The console_blanked variable must be restored when executing the con_debug_leave() or further kernel mode set changes (such as using chvt X) will fail to correctly set the state of console. Signed-off-by: Jason Wessel Reviewed-by: Jesse Barnes CC: Andrew Morton --- diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 3af1a2229fec..50590c7f2c01 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -198,6 +198,7 @@ static int saved_fg_console; static int saved_last_console; static int saved_want_console; static int saved_vc_mode; +static int saved_console_blanked; /* * For each existing display, we have a pointer to console currently visible @@ -3449,6 +3450,7 @@ int con_debug_enter(struct vc_data *vc) saved_last_console = last_console; saved_want_console = want_console; saved_vc_mode = vc->vc_mode; + saved_console_blanked = console_blanked; vc->vc_mode = KD_TEXT; console_blanked = 0; if (vc->vc_sw->con_debug_enter) @@ -3492,6 +3494,7 @@ int con_debug_leave(void) fg_console = saved_fg_console; last_console = saved_last_console; want_console = saved_want_console; + console_blanked = saved_console_blanked; vc_cons[fg_console].d->vc_mode = saved_vc_mode; vc = vc_cons[fg_console].d;