1 files changed, 18 insertions, 1 deletions

diff --git a/drivers/media/common/siano/smsdvb.c b/drivers/media/common/siano/smsdvb.c
index 4900aa9e8b7a..864f53e7ca63 100644
--- a/drivers/media/common/siano/smsdvb.c
+++ b/drivers/media/common/siano/smsdvb.c
@@ -655,7 +655,7 @@ static int smsdvb_isdbt_set_frontend(struct dvb_frontend *fe)
         int board_id = smscore_get_board_id(client->coredev);
         struct sms_board *board = sms_get_board(board_id);
         enum sms_device_type_st type = board->type;
-
+        int ret;
         struct {
                 struct SmsMsgHdr_ST     Msg;
                 u32             Data[4];
@@ -695,6 +695,23 @@ static int smsdvb_isdbt_set_frontend(struct dvb_frontend *fe)
                  c->frequency, c->isdbt_sb_segment_count,
                  c->isdbt_sb_segment_idx);
 
+        /* Disable LNA, if any. An error is returned if no LNA is present */
+        ret = sms_board_lna_control(client->coredev, 0);
+        if (ret == 0) {
+                fe_status_t status;
+
+                /* tune with LNA off at first */
+                ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
+                                                  &client->tune_done);
+
+                smsdvb_read_status(fe, &status);
+
+                if (status & FE_HAS_LOCK)
+                        return ret;
+
+                /* previous tune didn't lock - enable LNA and tune again */
+                sms_board_lna_control(client->coredev, 1);
+        }
         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
                                            &client->tune_done);
 }