[media] dvb: don't cause missing symbols for drxk/tda18271c2dd

If those demods are unselected, but a bridge driver requires them,
produce a runtime message, instead of missing symbols.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/tda18271c2dd.h b/drivers/media/dvb/frontends/tda18271c2dd.h
index 492badd50231..5ac2da5fcf19 100644
--- a/drivers/media/dvb/frontends/tda18271c2dd.h
+++ b/drivers/media/dvb/frontends/tda18271c2dd.h
@@ -2,4 +2,18 @@
 #define _TDA18271C2DD_H_
 struct dvb_frontend *tda18271c2dd_attach(struct dvb_frontend *fe,
                                          struct i2c_adapter *i2c, u8 adr);
+
+#if defined(CONFIG_DVB_TDA18271C2DD) || (defined(CONFIG_DVB_TDA18271C2DD_MODULE) \
+        && defined(MODULE))
+struct dvb_frontend *tda18271c2dd_attach(struct dvb_frontend *fe,
+                                         struct i2c_adapter *i2c, u8 adr);
+#else
+static inline struct dvb_frontend *tda18271c2dd_attach(struct dvb_frontend *fe,
+                                         struct i2c_adapter *i2c, u8 adr) {
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return NULL;
+}
+#endif
+
 #endif