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maynuo-m97: 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 19:15:51 +01:00 committed by Uwe Hermann
parent 4072d5b42f
commit fe535a89c9
1 changed files with 4 additions and 0 deletions
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4
src/hardware/maynuo-m97/api.c
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@ -363,9 +363,13 @@ static int config_list(uint32_t key, GVariant **data,
*data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg)); *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
break; break;
case SR_CONF_VOLTAGE_TARGET: case SR_CONF_VOLTAGE_TARGET:
if (!devc || !devc->model)
return SR_ERR_ARG;
*data = std_gvar_min_max_step(0.0, devc->model->max_voltage, 0.001); *data = std_gvar_min_max_step(0.0, devc->model->max_voltage, 0.001);
break; break;
case SR_CONF_CURRENT_LIMIT: case SR_CONF_CURRENT_LIMIT:
if (!devc || !devc->model)
return SR_ERR_ARG;
*data = std_gvar_min_max_step(0.0, devc->model->max_current, 0.0001); *data = std_gvar_min_max_step(0.0, devc->model->max_current, 0.0001);
break; break;
default: default: