Changeset 5bfaadde broke zig-zag for DVB-S drivers that don't
implement get_tune_settings() callback.

Fix the code, in order to allow it to work as before, otherwise
some channels may not be tuned anymore.

Fix Fedora Bugzilla:
        https://bugzilla.redhat.com/show_bug.cgi?id=814404

Reported-by: Michael Heijenga <database.wor...@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com>
---
 drivers/media/dvb/dvb-core/dvb_frontend.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c 
b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 39696c6..de7dc29 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -1898,6 +1898,10 @@ static int dtv_set_frontend(struct dvb_frontend *fe)
        } else {
                /* default values */
                switch (c->delivery_system) {
+               case SYS_DVBS:
+               case SYS_DVBS2:
+               case SYS_ISDBS:
+               case SYS_TURBO:
                case SYS_DVBC_ANNEX_A:
                case SYS_DVBC_ANNEX_C:
                        fepriv->min_delay = HZ / 20;
-- 
1.7.8

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