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SCSI bus phase not valid until REQ is true (Fix from David Jones).

This commit is contained in:
gwr 1995-08-14 20:00:00 +00:00
parent 8d3f7ee63c
commit 2666f17777
1 changed files with 5 additions and 3 deletions
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8
sys/arch/sun3/dev/si.c
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@ -1,4 +1,4 @@
/* $NetBSD: si.c,v 1.20 1995/08/12 20:31:15 mycroft Exp $ */
/* $NetBSD: si.c,v 1.21 1995/08/14 20:00:00 gwr Exp $ */
/*
* Copyright (C) 1994 Adam Glass, Gordon W. Ross
@ -709,10 +709,11 @@ sci_data_out(regs, phase, count, data)
icmd = regs->sci_icmd & ~(SCI_ICMD_DIFF|SCI_ICMD_TEST);
loop:
/* SCSI bus phase not valid until REQ is true. */
WAIT_FOR_REQ(regs);
if (SCI_CUR_PHASE(regs->sci_bus_csr) != phase)
return cnt;
WAIT_FOR_REQ(regs);
icmd |= SCI_ICMD_DATA;
regs->sci_icmd = icmd;
regs->sci_odata = *data++;
@ -741,10 +742,11 @@ sci_data_in(regs, phase, count, data)
icmd = regs->sci_icmd & ~(SCI_ICMD_DIFF|SCI_ICMD_TEST);
loop:
/* SCSI bus phase not valid until REQ is true. */
WAIT_FOR_REQ(regs);
if (SCI_CUR_PHASE(regs->sci_bus_csr) != phase)
return cnt;
WAIT_FOR_REQ(regs);
*data++ = regs->sci_data;
icmd |= SCI_ICMD_ACK;
regs->sci_icmd = icmd;