isci: unify request data structures

Make scic_sds_request a proper member of isci_request.  Also let's us
get rid of the dma pool object size tracking since we now know that all
requests are sizeof(isci_request).  While cleaning up the construct
routine incidentally replaced SCI_FIELD_OFFSET with offsetof.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 32 deletions

diff --git a/drivers/scsi/isci/core/scic_io_request.h b/drivers/scsi/isci/core/scic_io_request.h
index cb3667decb3c..f7c6d426f8c0 100644
--- a/drivers/scsi/isci/core/scic_io_request.h
+++ b/drivers/scsi/isci/core/scic_io_request.h
@@ -102,41 +102,10 @@ typedef enum {
 
 } SCIC_TRANSPORT_PROTOCOL;
 
-
-/**
- * scic_io_request_construct() - This method is called by the SCI user to
- *    construct all SCI Core IO requests.  Memory initialization and
- *    functionality common to all IO request types is performed in this method.
- * @scic_controller: the handle to the core controller object for which to
- *    build an IO request.
- * @scic_remote_device: the handle to the core remote device object for which
- *    to build an IO request.
- * @io_tag: This parameter specifies the IO tag to be associated with this
- *    request.  If SCI_CONTROLLER_INVALID_IO_TAG is passed, then a copy of the
- *    request is built internally.  The request will be copied into the actual
- *    controller request memory when the IO tag is allocated internally during
- *    the scic_controller_start_io() method.
- * @user_io_request_object: This parameter specifies the user IO request to be
- *    utilized during IO construction.  This IO pointer will become the
- *    associated object for the core IO request object.
- * @scic_io_request_memory: This parameter specifies the memory location to be
- *    utilized when building the core request.
- * @new_scic_io_request_handle: This parameter specifies a pointer to the
- *    handle the core will expect in further interactions with the core IO
- *    request object.
- *
- * The SCI core implementation will create an association between the user IO
- * request object and the core IO request object. Indicate if the controller
- * successfully built the IO request. SCI_SUCCESS This value is returned if the
- * IO request was successfully built.
- */
 enum sci_status scic_io_request_construct(
 	struct scic_sds_controller *scic_controller,
 	struct scic_sds_remote_device *scic_remote_device,
-	u16 io_tag,
-	void *user_io_request_object,
-	struct scic_sds_request *scic_io_request_memory,
-	struct scic_sds_request **new_scic_io_request_handle);
+	u16 io_tag, struct scic_sds_request *sci_req);
 
 /**
  * scic_io_request_construct_basic_ssp() - This method is called by the SCI