if you read with a smaller buffer than the block on the tape, b_resid and b_count...

diff --git a/sys/scsi/st.c b/sys/scsi/st.c
index 3bc4712..b83092d 100644 (file)
--- a/sys/scsi/st.c
+++ b/sys/scsi/st.c
@@ -854,7 +854,8 @@ done:
        /*
         * Correctly set the buf to indicate a completed xfer
         */
-       iodone(bp);
+       bp->b_resid = bp->b_bcount;
+       biodone(bp);
        return;
 }
 
@@ -1611,7 +1612,7 @@ st_interpret_sense(xs)
        struct buf *bp = xs->bp;
        struct st_softc *st = sc_link->device_softc;
        u_int8_t key;
-       u_int32_t info;
+       int32_t info;
 
        /*
         * Get the sense fields and work out what code