From: Mauro Carvalho Chehab Date: Thu, 18 Dec 2008 09:00:25 +0000 (-0300) Subject: V4L/DVB (9913): tuner-xc2028: allow printing stack trace as debug on sleep code X-Git-Tag: v3.12-rc1~16854^2~173 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e278e746bc95dd1e7aa90eb5b858c309266797cd;p=kernel%2Fkernel-generic.git V4L/DVB (9913): tuner-xc2028: allow printing stack trace as debug on sleep code tuner-xc3028 can be put to sleep to save power. However, if not properly recovered from sleep, the device won't work. It is noticed that some devices doesn't recover properly, so let's add a dump_stack() as a debug option, to allow us to track when this happens. Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c index 7b7e242..1adce9f 100644 --- a/drivers/media/common/tuners/tuner-xc2028.c +++ b/drivers/media/common/tuners/tuner-xc2028.c @@ -1107,6 +1107,10 @@ static int xc2028_sleep(struct dvb_frontend *fe) return 0; tuner_dbg("Putting xc2028/3028 into poweroff mode.\n"); + if (debug > 1) { + tuner_dbg("Printing sleep stack trace:\n"); + dump_stack(); + } mutex_lock(&priv->lock);