[media] dib7000m: Remove unnecessary null test

This patch removes the null test on ch. ch is initialized at the
beginning of the function to &demod->dtv_property_cache. Since demod
is dereferenced prior to the null test, demod must be a valid pointer,
and &demod->dtv_property_cache cannot be null.

The following Coccinelle script is used for detecting the change:

@r@
expression e,f;
identifier g,y;
statement S1,S2;
@@

*e = &f->g
<+...
 f->y
 ...+>
*if (e != NULL || ...)
 S1 else S2

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/media/dvb-frontends/dib7000m.c b/drivers/media/dvb-frontends/dib7000m.c
index 148bf79236fb..dcb9a15ef0c2 100644
--- a/drivers/media/dvb-frontends/dib7000m.c
+++ b/drivers/media/dvb-frontends/dib7000m.c
@@ -1041,10 +1041,7 @@ static int dib7000m_tune(struct dvb_frontend *demod)
         u16 value;
 
         // we are already tuned - just resuming from suspend
-        if (ch != NULL)
-                dib7000m_set_channel(state, ch, 0);
-        else
-                return -EINVAL;
+        dib7000m_set_channel(state, ch, 0);
 
         // restart demod
         ret |= dib7000m_write_word(state, 898, 0x4000);