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

*** 102,113 ****
  tkip_attach(struct ieee80211com *ic, struct ieee80211_key *k)
  {
          struct tkip_ctx *ctx;
  
          ctx = kmem_zalloc(sizeof (struct tkip_ctx), KM_SLEEP);
-         if (ctx == NULL)
-                 return (NULL);
  
          ctx->tc_ic = ic;
          return (ctx);
  }
  
--- 102,111 ----