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[Components][Drivers][USB]fix memory leak 

修复一个 bug 该bug曾导致在设备不断电但主机重新枚举设备的情况下会导致内存泄漏并无法接收数据
This commit is contained in:
ZYH 2018-01-17 21:12:21 +08:00
parent 627a90c2d0
commit a9f182140c
1 changed files with 4 additions and 1 deletions
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5
components/drivers/usb/usbdevice/class/hid.c
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@ -486,7 +486,10 @@ static rt_err_t _function_enable(ufunction_t func)
//
// _vcom_reset_state(func);
//
data->ep_out->buffer = rt_malloc(HID_RX_BUFSIZE);
if(data->ep_out->buffer == RT_NULL)
{
data->ep_out->buffer = rt_malloc(HID_RX_BUFSIZE);
}
data->ep_out->request.buffer = data->ep_out->buffer;
data->ep_out->request.size = EP_MAXPACKET(data->ep_out);
data->ep_out->request.req_type = UIO_REQUEST_READ_BEST;