Try this patch, it should stop start up corruption on the same frontend.

It is a missing section of code that checks the frontend is ready to go.

However, it will not stop corruptions on frontend A.

af9013 Extended monitoring in set_front.

---
 drivers/media/dvb/frontends/af9013.c |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/drivers/media/dvb/frontends/af9013.c 
b/drivers/media/dvb/frontends/af9013.c
index b220a87..347c187 100644
--- a/drivers/media/dvb/frontends/af9013.c
+++ b/drivers/media/dvb/frontends/af9013.c
@@ -622,8 +622,9 @@ static int af9013_set_frontend(struct dvb_frontend *fe,
        struct dvb_frontend_parameters *params)
 {
        struct af9013_state *state = fe->demodulator_priv;
-       int ret;
+       int ret, i;
        u8 auto_mode; /* auto set TPS */
+       u8 v1, v2;
 
        deb_info("%s: freq:%d bw:%d\n", __func__, params->frequency,
                params->u.ofdm.bandwidth);
@@ -694,6 +695,19 @@ static int af9013_set_frontend(struct dvb_frontend *fe,
        if (ret)
                goto error;
 
+       for (i = 0; i < 27; ++i) {
+               ret = af9013_read_reg(state, 0x9bc2, &v1);
+               if (ret)
+                       break;
+               ret = af9013_read_reg(state, 0xd330, &v2);
+               if (ret)
+                       break;
+               if (v1 == 0 && v2 > 0)
+                               break;
+               msleep(40);
+       }
+
+
 error:
        return ret;
 }
-- 
1.7.5.4


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