From b913e6653d20efd26f7d39deff0dc76c42d5cb5c Mon Sep 17 00:00:00 2001 From: Pyun YongHyeon Date: Mon, 9 Feb 2009 04:02:53 +0000 Subject: MFC r186884: Always check whether dma map is valid before unloading the map. When fxp(4) intializes Rx buffers for the first time, there is no loaded dma map so attempting to unload it is an invalid operation. --- sys/dev/fxp/if_fxp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c index 9a6851c9c227..ca1a6141ae3f 100644 --- a/sys/dev/fxp/if_fxp.c +++ b/sys/dev/fxp/if_fxp.c @@ -2545,7 +2545,8 @@ fxp_new_rfabuf(struct fxp_softc *sc, struct fxp_rx *rxp) return (error); } - bus_dmamap_unload(sc->fxp_mtag, rxp->rx_map); + if (rxp->rx_mbuf != NULL) + bus_dmamap_unload(sc->fxp_mtag, rxp->rx_map); tmp_map = sc->spare_map; sc->spare_map = rxp->rx_map; rxp->rx_map = tmp_map; -- cgit v1.3