diff options
Diffstat (limited to 'sys/dev/dcons/dcons_crom.c')
| -rw-r--r-- | sys/dev/dcons/dcons_crom.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sys/dev/dcons/dcons_crom.c b/sys/dev/dcons/dcons_crom.c index 0b2b707fcde6..ee263e95ac78 100644 --- a/sys/dev/dcons/dcons_crom.c +++ b/sys/dev/dcons/dcons_crom.c @@ -205,7 +205,10 @@ dcons_crom_attach(device_t dev) return (-1); #else struct dcons_crom_softc *sc; + int error; + if (dcons_conf->buf == NULL) + return (ENXIO); sc = (struct dcons_crom_softc *) device_get_softc(dev); sc->fd.fc = device_get_ivars(dev); sc->fd.dev = dev; @@ -213,7 +216,7 @@ dcons_crom_attach(device_t dev) sc->fd.post_busreset = (void *) dcons_crom_post_busreset; /* map dcons buffer */ - bus_dma_tag_create( + error = bus_dma_tag_create( /*parent*/ sc->fd.fc->dmat, /*alignment*/ sizeof(u_int32_t), /*boundary*/ 0, @@ -229,10 +232,16 @@ dcons_crom_attach(device_t dev) /*lockarg*/&Giant, #endif &sc->dma_tag); - bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map); - bus_dmamap_load(sc->dma_tag, sc->dma_map, + if (error != 0) + return (error); + error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map); + if (error != 0) + return (error); + error = bus_dmamap_load(sc->dma_tag, sc->dma_map, (void *)dcons_conf->buf, dcons_conf->size, dmamap_cb, sc, 0); + if (error != 0) + return (error); sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll, (void *)sc, 0); return (0); |