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authorMauro Carvalho Chehab <mchehab@redhat.com>2008-12-18 06:00:25 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-12-30 09:39:15 -0200
commite278e746bc95dd1e7aa90eb5b858c309266797cd (patch)
tree78856a2d2cd325a44c92aab9295a031a3f6dbd69
parentefc52a94840198eb5ba68107812b879d34959dbb (diff)
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 <mchehab@redhat.com>
-rw-r--r--drivers/media/common/tuners/tuner-xc2028.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c
index 7b7e242cae1..1adce9ff52c 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);