Bluetooth: ath3k: don't use stack memory for DMA

static int ath3k_get_state(struct usb_device *udev, unsigned char *state)

{

	int pipe = 0;

	int ret, pipe = 0;

	char *buf;

	buf = kmalloc(sizeof(*buf), GFP_KERNEL);

	if (!buf)

		return -ENOMEM;

	pipe = usb_rcvctrlpipe(udev, 0);

	return usb_control_msg(udev, pipe, ATH3K_GETSTATE,

	ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,

			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,

			state, 0x01, USB_CTRL_SET_TIMEOUT);

			      buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);

	*state = *buf;

	kfree(buf);

	return ret;

}

static int ath3k_get_version(struct usb_device *udev,

			struct ath3k_version *version)

{

	int pipe = 0;

	int ret, pipe = 0;

	struct ath3k_version *buf;

	const int size = sizeof(*buf);

	buf = kmalloc(size, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;

	pipe = usb_rcvctrlpipe(udev, 0);

	return usb_control_msg(udev, pipe, ATH3K_GETVERSION,

			USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,

			sizeof(struct ath3k_version),

			USB_CTRL_SET_TIMEOUT);

	ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,

			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,

			      buf, size, USB_CTRL_SET_TIMEOUT);

	memcpy(version, buf, size);

	kfree(buf);

	return ret;

}

static int ath3k_load_fwfile(struct usb_device *udev,