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

*** 567,581 ****
          ring->physaddr = ring->txdesc_dma.cookie.dmac_address;
          bzero(ring->desc, count * sizeof (struct mwl_txdesc));
  
          datadlen = count * sizeof (struct mwl_txbuf);
          ring->buf = kmem_zalloc(datadlen, KM_SLEEP);
-         if (ring->buf == NULL) {
-                 MWL_DBG(MWL_DBG_DMA, "mwl: mwl_alloc_tx_ring(): "
-                     "could not alloc tx ring data buffer\n");
-                 return (DDI_FAILURE);
-         }
          bzero(ring->buf, count * sizeof (struct mwl_txbuf));
  
          for (i = 0; i < count; i++) {
                  ds = &ring->desc[i];
                  bf = &ring->buf[i];
--- 567,576 ----
*** 2224,2239 ****
  mwl_node_alloc(struct ieee80211com *ic)
  {
          struct mwl_node *mn;
  
          mn = kmem_zalloc(sizeof (struct mwl_node), KM_SLEEP);
-         if (mn == NULL) {
-                 /* XXX stat+msg */
-                 MWL_DBG(MWL_DBG_MSG, "mwl: mwl_node_alloc(): "
-                     "alloc node failed\n");
-                 return (NULL);
-         }
          return (&mn->mn_node);
  }
  
  static void
  mwl_node_free(struct ieee80211_node *ni)
--- 2219,2228 ----