staging: unisys: visorbus: remove putfile data structures

static struct controlvm_message controlvm_pending_msg;

static bool controlvm_pending_msg_valid;

/*

 * This describes a buffer and its current state of transfer (e.g., how many

 * bytes have already been supplied as putfile data, and how many bytes are

 * remaining) for a putfile_request.

 */

struct putfile_active_buffer {

	/* a payload from a controlvm message, containing a file data buffer */

	struct parser_context *parser_ctx;

	/* points within data area of parser_ctx to next byte of data */

	size_t bytes_remaining;

};

#define PUTFILE_REQUEST_SIG 0x0906101302281211

/*

 * This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE

 * conversation. Structs of this type are dynamically linked into

 * <Putfile_request_list>.

 */

struct putfile_request {

	u64 sig;		/* PUTFILE_REQUEST_SIG */

	/* header from original TransmitFile request */

	struct controlvm_message_header controlvm_header;

	/* link to next struct putfile_request */

	struct list_head next_putfile_request;

	/*

	 * head of putfile_buffer_entry list, which describes the data to be

	 * supplied as putfile data;

	 * - this list is added to when controlvm messages come in that supply

	 * file data

	 * - this list is removed from via the hotplug program that is actually

	 * consuming these buffers to write as file data

	 */

	struct list_head input_buffer_list;

	spinlock_t req_list_lock;	/* lock for input_buffer_list */

	/* waiters for input_buffer_list to go non-empty */

	wait_queue_head_t input_buffer_wq;

	/* data not yet read within current putfile_buffer_entry */

	struct putfile_active_buffer active_buf;

	/*

	 * <0 = failed, 0 = in-progress, >0 = successful;

	 * note that this must be set with req_list_lock, and if you set <0,

	 * it is your responsibility to also free up all of the other objects

	 * in this struct (like input_buffer_list, active_buf.parser_ctx)

	 * before releasing the lock

	 */

	int completion_status;

};

struct parahotplug_request {

	struct list_head list;

	int id;