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media: drxk_hard: check if parameter is not NULL

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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+samsung@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2018-12-07 08:07:55 -05:00
parent e7121ab405
commit daad52c8aa
1 changed files with 5 additions and 3 deletions
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8
drivers/media/dvb-frontends/drxk_hard.c
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@ -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);