C++ (Cpp) vp702x_usb_inout_op示例

示例#1

static int vp702x_usb_inout_cmd(struct dvb_usb_device *d, u8 cmd, u8 *o,
				int olen, u8 *i, int ilen, int msec)
{
	u8 bout[olen+2];
	u8 bin[ilen+1];
	int ret = 0;

	bout[0] = 0x00;
	bout[1] = cmd;
	memcpy(&bout[2],o,olen);

	ret = vp702x_usb_inout_op(d, bout, olen+2, bin, ilen+1,msec);

	if (ret == 0)
		memcpy(i,&bin[1],ilen);

	return ret;
}

示例#2

文件： vp702x.c 项目： 0xroot/Blackphone-BP1-Kernel

static int vp702x_usb_inout_cmd(struct dvb_usb_device *d, u8 cmd, u8 *o,
				int olen, u8 *i, int ilen, int msec)
{
	struct vp702x_device_state *st = d->priv;
	int ret = 0;
	u8 *buf;
	int buflen = max(olen + 2, ilen + 1);

	ret = mutex_lock_interruptible(&st->buf_mutex);
	if (ret < 0)
		return ret;

	if (buflen > st->buf_len) {
		buf = kmalloc(buflen, GFP_KERNEL);
		if (!buf) {
			mutex_unlock(&st->buf_mutex);
			return -ENOMEM;
		}
		info("successfully reallocated a bigger buffer");
		kfree(st->buf);
		st->buf = buf;
		st->buf_len = buflen;
	} else {
		buf = st->buf;
	}

	buf[0] = 0x00;
	buf[1] = cmd;
	memcpy(&buf[2], o, olen);

	ret = vp702x_usb_inout_op(d, buf, olen+2, buf, ilen+1, msec);

	if (ret == 0)
		memcpy(i, &buf[1], ilen);
	mutex_unlock(&st->buf_mutex);

	return ret;
}