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freebsd_amp_hwpstate
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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.
This commit is contained in:
Justin T. Gibbs 1996-05-27 23:16:55 +00:00
parent 187f8e98f5
commit 070d32b1a9
1 changed files with 3 additions and 3 deletions
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6
sys/dev/aic7xxx/aic7xxx.seq
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@ -39,7 +39,7 @@
*
*-M************************************************************************/
VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.35 1996/05/21 18:32:22 gibbs Exp $"
VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.36 1996/05/23 15:01:47 gibbs Exp $"
#include "../../dev/aic7xxx/aic7xxx_reg.h"
@ -495,11 +495,11 @@ p_mesgout_start:
* a MESSAGE REJECT.
*/
p_mesgout_loop:
test SSTAT1,PHASEMIS jnz p_mesgout_phasemis
test SSTAT0,SPIORDY jz p_mesgout_loop
cmp DINDEX,1 jne p_mesgout_outb /* last byte? */
mvi CLRSINT1,CLRATNO /* drop ATN */
p_mesgout_outb:
test SSTAT1,PHASEMIS jnz p_mesgout_phasemis
dec DINDEX
or CLRSINT0, CLRSPIORDY
mov SCSIDATL,SINDIR
@ -862,8 +862,8 @@ inb_next:
or CLRSINT0, CLRSPIORDY
mov NONE,SCSIDATL /*dummy read from latch to ACK*/
inb_next_wait:
test SSTAT1,PHASEMIS jnz mesgin_phasemis
test SSTAT0,SPIORDY jz inb_next_wait /* wait for next byte */
test SSTAT1,PHASEMIS jnz mesgin_phasemis
inb_first:
mov DINDEX,SINDEX
mov DINDIR,SCSIBUSL ret /*read byte directly from bus*/