components: drivers: adc: fixed cppcheck error

unicornx · Rbb666 · commit 60c6fc0e3a2d · 2025-06-10T14:21:46.000+08:00
[cpp_check.py 80 INFO] components/drivers/misc/adc.c:76:12:
error: Uninitialized variable: result [legacyUninitvar]
    return result;
           ^

Signed-off-by: Chen Wang &lt;unicorn_wang@outlook.com&gt;
diff --git a/components/drivers/misc/adc.c b/components/drivers/misc/adc.c
@@ -43,7 +43,7 @@ static rt_ssize_t _adc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size
 static rt_err_t _adc_control(rt_device_t dev, int cmd, void *args)
 {
     rt_adc_device_t adc = (struct rt_adc_device *)dev;
-    rt_err_t        result;
+    rt_err_t        result = RT_ERROR;
 
     if (cmd == RT_ADC_CMD_ENABLE && adc->ops->enabled)
     {

Original file line number	Diff line number	Diff line change
`@@ -43,7 +43,7 @@ static rt_ssize_t _adc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size`
`43`	`43`	`static rt_err_t _adc_control(rt_device_t dev, int cmd, void *args)`
`44`	`44`	`{`
`45`	`45`	`rt_adc_device_t adc = (struct rt_adc_device *)dev;`
`46`		`- rt_err_t result;`
	`46`	`+ rt_err_t result = RT_ERROR;`
`47`	`47`
`48`	`48`	`if (cmd == RT_ADC_CMD_ENABLE && adc->ops->enabled)`
`49`	`49`	`{`