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korad-kaxxxxp: fix potential NULL dereference 

Check pointers' validity before dereferencing them.

This was reported by clang's scan-build.
This commit is contained in:
Gerhard Sittig 2018-02-09 19:08:11 +01:00 committed by Uwe Hermann
parent 1674225a2f
commit fc69eecca0
1 changed files with 4 additions and 0 deletions
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4
src/hardware/korad-kaxxxxp/api.c
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@ -281,9 +281,13 @@ static int config_list(uint32_t key, GVariant **data,
case SR_CONF_DEVICE_OPTIONS:
return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
case SR_CONF_VOLTAGE_TARGET:
if (!devc || !devc->model)
return SR_ERR_ARG;
*data = std_gvar_min_max_step_array(devc->model->voltage);
break;
case SR_CONF_CURRENT_LIMIT:
if (!devc || !devc->model)
return SR_ERR_ARG;
*data = std_gvar_min_max_step_array(devc->model->current);
break;
default: