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atten-pps3xxx: silence NULL dereference compiler warnings 

Check pointers' validity before dereferencing them.

This was reported by clang's scan-build.
This commit is contained in:
Gerhard Sittig 2018-02-08 22:02:59 +01:00 committed by Uwe Hermann
parent 7ee8511be4
commit f6c685e4d3
1 changed files with 6 additions and 0 deletions
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6
src/hardware/atten-pps3xxx/api.c
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@ -317,6 +317,8 @@ 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_CHANNEL_CONFIG:
if (!devc || !devc->model)
return SR_ERR_ARG;
if (devc->model->channel_modes == CHANMODE_INDEPENDENT) {
/* The 1-channel models. */
*data = g_variant_new_strv(channel_modes, 1);
@ -338,9 +340,13 @@ static int config_list(uint32_t key, GVariant **data,
*data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
break;
case SR_CONF_VOLTAGE_TARGET:
if (!devc || !devc->model)
return SR_ERR_ARG;
*data = std_gvar_min_max_step_array(devc->model->channels[channel].voltage);
break;
case SR_CONF_CURRENT_LIMIT:
if (!devc || !devc->model)
return SR_ERR_ARG;
*data = std_gvar_min_max_step_array(devc->model->channels[channel].current);
break;
default: