V4L/DVB (7126): tuner: move tuner type ID check to simple_tuner_attach

Move tuner type ID check from tuner-core::set_type to simple_tuner_attach.

Since tuner-core forwards all attach requests to tuner-simple as the
default case, unless a specific attach function is specified in
set_type, this change is an appropriate cleanup.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/video/tuner-simple.c b/drivers/media/video/tuner-simple.c
index 85556d44c8ab..d3362703e258 100644
--- a/drivers/media/video/tuner-simple.c
+++ b/drivers/media/video/tuner-simple.c
@@ -688,6 +688,12 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
 {
         struct tuner_simple_priv *priv = NULL;
 
+        if (type >= tuner_count) {
+                printk(KERN_WARNING "%s: invalid tuner type: %d (max: %d)\n",
+                       __FUNCTION__, type, tuner_count-1);
+                return NULL;
+        }
+
         priv = kzalloc(sizeof(struct tuner_simple_priv), GFP_KERNEL);
         if (priv == NULL)
                 return NULL;