Re: kern/2727 (Writing to SCSI tape panics system with 'done < 0; strategy broken message)

[David Holland <dholland-bugs%netbsd.org@localhost>]

On Tue, Sep 02, 2008 at 07:07:02AM +0000, dholland%NetBSD.org@localhost wrote:
 > State-Changed-From-To: suspended->open
 > While we're looking at st(4)...

So... here, I think the problem with Manuel's 2002 patch (which has
been committed at some point) is that it wasn't meant to deal with an
error condition. But I note that st.c now has this in stdone:

        bp->b_error = error;
        bp->b_resid = xs->resid;
        /*
         * buggy device ? A SDLT320 can report an info
         * field of 0x3de8000 on a Media Error/Write Error
         * for this CBD: 0x0a 00 00 80 00 00
         */
        if (bp->b_resid > bp->b_bcount || bp->b_resid < 0)
                bp->b_resid = bp->b_bcount;

which will both avoid a panic and also prevent upper-layer code from
thinking the write went through.

So I think this PR can be closed. Manuel? Anyone else? Is the
submitter still around?

-- 
David A. Holland
dholland%netbsd.org@localhost