i2o_block_sglist_alloc — Allocate the SG list and map it
int i2o_block_sglist_alloc
(struct i2o_controller * c, struct i2o_block_request * ireq, u32 ** mptr);
I2O controller to which the request belongs
I2O block request
message body pointer
Builds the SG list and map it to be accessable by the controller.
Returns 0 on failure or 1 on success.