Fix a race condition in p_mesgout* and inb* code that could allow a
phasemiss to sneak by without detection. This should fix the Wide/Narrow boot problems that have been reported since this bug caused the driver ignore a narrow target rejecting wide negotiation.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=15951
@ -39,7 +39,7 @@
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*
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*-M************************************************************************/
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VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.35 1996/05/21 18:32:22 gibbs Exp $"
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VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.36 1996/05/23 15:01:47 gibbs Exp $"
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#include "../../dev/aic7xxx/aic7xxx_reg.h"
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@ -495,11 +495,11 @@ p_mesgout_start:
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* a MESSAGE REJECT.
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*/
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p_mesgout_loop:
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test SSTAT1,PHASEMIS jnz p_mesgout_phasemis
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test SSTAT0,SPIORDY jz p_mesgout_loop
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cmp DINDEX,1 jne p_mesgout_outb /* last byte? */
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mvi CLRSINT1,CLRATNO /* drop ATN */
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p_mesgout_outb:
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test SSTAT1,PHASEMIS jnz p_mesgout_phasemis
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dec DINDEX
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or CLRSINT0, CLRSPIORDY
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mov SCSIDATL,SINDIR
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@ -862,8 +862,8 @@ inb_next:
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or CLRSINT0, CLRSPIORDY
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mov NONE,SCSIDATL /*dummy read from latch to ACK*/
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inb_next_wait:
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test SSTAT1,PHASEMIS jnz mesgin_phasemis
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test SSTAT0,SPIORDY jz inb_next_wait /* wait for next byte */
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test SSTAT1,PHASEMIS jnz mesgin_phasemis
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inb_first:
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mov DINDEX,SINDEX
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mov DINDIR,SCSIBUSL ret /*read byte directly from bus*/
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