diff options
Diffstat (limited to 'sys/dev/ata/atapi-fd.c')
| -rw-r--r-- | sys/dev/ata/atapi-fd.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/dev/ata/atapi-fd.c b/sys/dev/ata/atapi-fd.c index 6c45f6f..f8e3291 100644 --- a/sys/dev/ata/atapi-fd.c +++ b/sys/dev/ata/atapi-fd.c @@ -254,6 +254,13 @@ afdstrategy(struct buf *bp) struct afd_softc *fdp = bp->b_dev->si_drv1; int32_t s; + /* if it's a null transfer, return immediatly. */ + if (bp->b_bcount == 0) { + bp->b_resid = 0; + biodone(bp); + return; + } + s = splbio(); bufq_insert_tail(&fdp->buf_queue, bp); afd_start(fdp); @@ -267,7 +274,7 @@ afd_start(struct afd_softc *fdp) u_int32_t lba, count; int8_t ccb[16]; int8_t *data_ptr; - + if (!bp) return; |
