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Bring in Gordon's fix from the sun3 port:

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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:
thorpej 1996-02-22 07:14:53 +00:00
parent e8c79c9ef1
commit 2f132eb5e7
1 changed files with 7 additions and 4 deletions
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11
sys/arch/sparc/dev/si.c
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@ -1,4 +1,4 @@
/* $NetBSD: si.c,v 1.11 1996/01/09 02:36:58 thorpej Exp $ */
/* $NetBSD: si.c,v 1.12 1996/02/22 07:14:53 thorpej Exp $ */
/*
* Copyright (c) 1995 Jason R. Thorpe
@ -1012,12 +1012,15 @@ 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