[ofa-general] ibv_reg_mr errno return codes?

[Troy Benjegerdes]

I made the following change to infiniband/hw/ehca/ehca_mrmw.c to have  
ibv_reg_mr return -ENOMEM instead of -EINVAL.. shouldn't we define  
and document what errno codes ibv_reg_mr is expected to return so  
that applications have some idea if there is a permanent failure and  
they need to exit, or go back and unregister some locked memory?

diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/ 
infiniband/hw/ehca/ehca_
index cfb362a..58073f0 100644
--- a/drivers/infiniband/hw/ehca/ehca_mrmw.c
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -2047,13 +2047,14 @@ int ehca_mrmw_map_hrc_alloc(const u64 hipz_rc)
                 return 0;
         case H_ADAPTER_PARM:         /* invalid adapter handle */
         case H_RT_PARM:              /* invalid resource type */
-       case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
         case H_MLENGTH_PARM:         /* invalid memory length */
         case H_MEM_ACCESS_PARM:      /* invalid access controls */
         case H_CONSTRAINED:          /* resource constraint */
                 return -EINVAL;
         case H_BUSY:                 /* long busy */
                 return -EBUSY;
+       case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
+               return -ENOMEM;
         default:
                 return -EINVAL;
         }
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