From 6d24ae3be3237b48676a12d68b70397d3937629d Mon Sep 17 00:00:00 2001 From: royger Date: Thu, 4 Sep 2014 14:56:24 +0000 Subject: [PATCH] Revert r269814: blkfront: add support for unmapped IO Current busdma code for unmapped bios will not properly align the segment size, causing corruption on blkfront devices. Revert the commit until busdma code is fixed. Reported by: mav MFC after: 1 day --- sys/dev/xen/blkfront/blkfront.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/sys/dev/xen/blkfront/blkfront.c b/sys/dev/xen/blkfront/blkfront.c index 7a1c974552b4..92b5f3542819 100644 --- a/sys/dev/xen/blkfront/blkfront.c +++ b/sys/dev/xen/blkfront/blkfront.c @@ -272,12 +272,8 @@ xbd_queue_request(struct xbd_softc *sc, struct xbd_command *cm) { int error; - if (cm->cm_bp != NULL) - error = bus_dmamap_load_bio(sc->xbd_io_dmat, cm->cm_map, - cm->cm_bp, xbd_queue_cb, cm, 0); - else - error = bus_dmamap_load(sc->xbd_io_dmat, cm->cm_map, - cm->cm_data, cm->cm_datalen, xbd_queue_cb, cm, 0); + error = bus_dmamap_load(sc->xbd_io_dmat, cm->cm_map, cm->cm_data, + cm->cm_datalen, xbd_queue_cb, cm, 0); if (error == EINPROGRESS) { /* * Maintain queuing order by freezing the queue. The next @@ -337,6 +333,8 @@ xbd_bio_command(struct xbd_softc *sc) } cm->cm_bp = bp; + cm->cm_data = bp->bio_data; + cm->cm_datalen = bp->bio_bcount; cm->cm_sector_number = (blkif_sector_t)bp->bio_pblkno; switch (bp->bio_cmd) { @@ -995,7 +993,7 @@ xbd_instance_create(struct xbd_softc *sc, blkif_sector_t sectors, sc->xbd_disk->d_mediasize = sectors * sector_size; sc->xbd_disk->d_maxsize = sc->xbd_max_request_size; - sc->xbd_disk->d_flags = DISKFLAG_UNMAPPED_BIO; + sc->xbd_disk->d_flags = 0; if ((sc->xbd_flags & (XBDF_FLUSH|XBDF_BARRIER)) != 0) { sc->xbd_disk->d_flags |= DISKFLAG_CANFLUSHCACHE; device_printf(sc->xbd_dev,