5253 kmem_alloc/kmem_zalloc won't fail with KM_SLEEP
5254 getrbuf won't fail with KM_SLEEP

@@ -628,14 +628,10 @@
         }
 
         if (data != NULL) {
                 data->data = kmem_alloc(krdc->bitmap_size, KM_SLEEP);
                 data->len = krdc->bitmap_size;
-
-                if (data->data == NULL) {
-                        return (-1);
-                }
         }
 
         mutex_enter(&krdc->bmapmutex);
 
         urdc = &rdc_u_info[krdc->index];