pms(4): Do not return CAM_REQ_CMP on errors.
    
    It is a direct request for data corruptions, one report of which we
    have received.  I am very surprised that only one.
    
    MFC after:      1 week
    Sponsored by:   iXsystems, Inc.
    
    (cherry picked from commit 8434a65ce49bd6bc6779f0e57b0ce0f4bc46f48e)
    (cherry picked from commit 320fd259c69ef16e9b8d64424f66eeed8ddc3c77)
--- sys/dev/pms/freebsd/driver/ini/src/agtiapi.c.orig
+++ sys/dev/pms/freebsd/driver/ini/src/agtiapi.c
@@ -2628,9 +2628,11 @@
     {
       AGTIAPI_PRINTK("agtiapi_PrepareSGListCB: error status 0x%x\n", error);
       bus_dmamap_unload(pmcsc->buffer_dmat, pccb->CCB_dmamap);
-      bus_dmamap_destroy(pmcsc->buffer_dmat, pccb->CCB_dmamap);
       agtiapi_FreeCCB(pmcsc, pccb);
-      ccb->ccb_h.status = CAM_REQ_CMP;
+      if (error == EFBIG)
+        ccb->ccb_h.status = CAM_REQ_TOO_BIG;
+      else
+        ccb->ccb_h.status = CAM_REQ_CMP_ERR;
       xpt_done(ccb);
       return;
     }
@@ -2642,9 +2644,8 @@
                     " AGTIAPI_MAX_DMA_SEGS %d\n", 
                     nsegs, AGTIAPI_MAX_DMA_SEGS );
     bus_dmamap_unload(pmcsc->buffer_dmat, pccb->CCB_dmamap);
-    bus_dmamap_destroy(pmcsc->buffer_dmat, pccb->CCB_dmamap);
     agtiapi_FreeCCB(pmcsc, pccb);
-    ccb->ccb_h.status = CAM_REQ_CMP;
+    ccb->ccb_h.status = CAM_REQ_TOO_BIG;
     xpt_done(ccb);   
     return;
   }
@@ -3688,9 +3689,11 @@
       AGTIAPI_PRINTK( "agtiapi_PrepareSMPSGListCB: error status 0x%x\n",
                       error );
       bus_dmamap_unload( pmcsc->buffer_dmat, pccb->CCB_dmamap );
-      bus_dmamap_destroy( pmcsc->buffer_dmat, pccb->CCB_dmamap );
       agtiapi_FreeCCB( pmcsc, pccb );
-      ccb->ccb_h.status = CAM_REQ_CMP;
+      if (error == EFBIG)
+        ccb->ccb_h.status = CAM_REQ_TOO_BIG;
+      else
+        ccb->ccb_h.status = CAM_REQ_CMP_ERR;
       xpt_done( ccb );
       return;
     }
@@ -3702,9 +3705,8 @@
                     "AGTIAPI_MAX_DMA_SEGS %d\n",
                     nsegs, AGTIAPI_MAX_DMA_SEGS );
     bus_dmamap_unload( pmcsc->buffer_dmat, pccb->CCB_dmamap );
-    bus_dmamap_destroy( pmcsc->buffer_dmat, pccb->CCB_dmamap );
     agtiapi_FreeCCB( pmcsc, pccb );
-    ccb->ccb_h.status = CAM_REQ_CMP;
+    ccb->ccb_h.status = CAM_REQ_TOO_BIG;
     xpt_done( ccb );
     return;
   }
@@ -4409,7 +4411,7 @@
   if ((pccb = agtiapi_GetCCB(pmcsc)) == NULL)
   {
     AGTIAPI_PRINTK("agtiapi_QueueSMP: GetCCB ERROR\n");
-    ccb->ccb_h.status = CAM_REQ_CMP;
+    ccb->ccb_h.status = CAM_REQ_CMP_ERR;
     xpt_done(ccb);
     return tiBusy;
   }