[PATCH 2/2] media: drxk_hard: check if parameter is not NULL

[Mauro Carvalho Chehab]

There is a smatch warning:
        drivers/media/dvb-frontends/drxk_hard.c: 
drivers/media/dvb-frontends/drxk_hard.c:1478 scu_command() error: we previously 
assumed 'parameter' could be null (see line 1467)

Telling that parameter might be NULL. Well, it can't, due to the
way the driver works, but it doesn't hurt to add a check, in order
to shut up smatch.

Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
---
 drivers/media/dvb-frontends/drxk_hard.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/media/dvb-frontends/drxk_hard.c 
b/drivers/media/dvb-frontends/drxk_hard.c
index 84ac3f73f8fe..8ea1e45be710 100644
--- a/drivers/media/dvb-frontends/drxk_hard.c
+++ b/drivers/media/dvb-frontends/drxk_hard.c
@@ -1474,9 +1474,11 @@ static int scu_command(struct drxk_state *state,
 
        /* assume that the command register is ready
                since it is checked afterwards */
-       for (ii = parameter_len - 1; ii >= 0; ii -= 1) {
-               buffer[cnt++] = (parameter[ii] & 0xFF);
-               buffer[cnt++] = ((parameter[ii] >> 8) & 0xFF);
+       if (parameter) {
+               for (ii = parameter_len - 1; ii >= 0; ii -= 1) {
+                       buffer[cnt++] = (parameter[ii] & 0xFF);
+                       buffer[cnt++] = ((parameter[ii] >> 8) & 0xFF);
+               }
        }
        buffer[cnt++] = (cmd & 0xFF);
        buffer[cnt++] = ((cmd >> 8) & 0xFF);
-- 
2.19.2