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Correct the DMA transfer count when the target disconnects before 

the whole transfer is completed.  (Affects VME writes)
Reselect now works on the VME si board!
This commit is contained in:
gwr 1996-02-22 03:22:52 +00:00
parent a19a024e59
commit 3700dbe324
1 changed files with 7 additions and 4 deletions
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11
sys/arch/sun3/dev/ncr_si.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ncr_si.c,v 1.5 1996/02/16 20:33:27 gwr Exp $ */
/* $NetBSD: ncr_si.c,v 1.6 1996/02/22 03:22:52 gwr Exp $ */
/*
* Copyright (c) 1995 David Jones, Gordon W. Ross
@ -897,12 +897,15 @@ si_vme_dma_stop(ncr_sc)
*
* SCSI-3 VME interface is a little funny on writes:
* if we have a disconnect, the dma has overshot by
* one byte and needs to be incremented. This is
* true if we have not transferred either all data
* or no data. XXX - from Matt Jacob
* one byte and the resid needs to be incremented.
* Only happens for partial transfers.
* (Thanks to Matt Jacob)
*/
resid = si->fifo_count & 0xFFFF;
if (dh->dh_flags & SIDH_OUT)
if ((resid > 0) && (resid < sc->sc_xlen))
resid++;
ntrans = sc->sc_xlen - resid;
#ifdef DEBUG