-#define lbs_cmd(priv, cmdnr, cmd, callback, callback_arg) \
- __lbs_cmd(priv, cmdnr, &(cmd).hdr, sizeof(cmd), \
- callback, callback_arg)
-
-#define lbs_cmd_with_response(priv, cmdnr, cmd) \
- __lbs_cmd(priv, cmdnr, &(cmd).hdr, sizeof(cmd), \
- lbs_cmd_copyback, (unsigned long) &cmd)
-
+/* lbs_cmd() infers the size of the buffer to copy data back into, from
+ the size of the target of the pointer. Since the command to be sent
+ may often be smaller, that size is set in cmd->size by the caller.*/
+#define lbs_cmd(priv, cmdnr, cmd, cb, cb_arg) ({ \
+ uint16_t __sz = le16_to_cpu((cmd)->hdr.size); \
+ (cmd)->hdr.size = cpu_to_le16(sizeof(*(cmd))); \
+ __lbs_cmd(priv, cmdnr, &(cmd)->hdr, __sz, cb, cb_arg); \
+})
+
+#define lbs_cmd_with_response(priv, cmdnr, cmd) \
+ lbs_cmd(priv, cmdnr, cmd, lbs_cmd_copyback, (unsigned long) (cmd))
+
+/* __lbs_cmd() will free the cmdnode and return success/failure.
+ __lbs_cmd_async() requires that the callback free the cmdnode */
+struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command,
+ struct cmd_header *in_cmd, int in_cmd_size,
+ int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
+ unsigned long callback_arg);