[Components][SDIO]block 	'err' declared without an initial value
@@ -252,7 +252,7 @@ static rt_size_t rt_mmcsd_read(rt_device_t dev,
void *buffer,
rt_size_t size)
{
- rt_err_t err;
+ rt_err_t err = 0;
rt_size_t offset = 0;
rt_size_t req_size = 0;
rt_size_t remain_size = size;
@@ -293,7 +293,7 @@ static rt_size_t rt_mmcsd_write(rt_device_t dev,
const void *buffer,
rt_size_t size)
{
- rt_err_t err;
+ rt_err_t err = 0;
rt_size_t offset = 0;
rt_size_t req_size = 0;
rt_size_t remain_size = size;
