This fix repairs a bug in the code handling the resetting of an Adaptec
host adapter.  Some adapters, notably the old 1540A type, do not set all
the expected status bits immediately after the reset is done.  This will
keep the driver from recognizing the card.

To apply this fix do the following as bin:

	! cd /usr
	! patch -p0 < "this-file"

And build a new kernel normally.  You will find the original aha_scsi.c
file renamed to aha_scsi.c~ in src/kernel/.  You may wish to delete it
to clean things up.

diff -c -r /save/std/2.0.0/src/kernel/aha_scsi.c ./src/kernel/aha_scsi.c
*** /save/std/2.0.0/src/kernel/aha_scsi.c	Sun Apr 21 21:54:49 1996
--- ./src/kernel/aha_scsi.c	Wed Oct 23 22:09:08 1996
***************
*** 1852,1872 ****
    /* Reset controller, wait for self test to complete. */
    out_byte(AHA_CNTLREG, AHA_HRST);
    milli_start(&ms);
!   while ((stat = in_byte(AHA_STATREG)) & AHA_STST) {
  	if (milli_elapsed(&ms) >= AHA_TIMEOUT) {
! 		printf("aha0: AHA154x controller not responding\n");
  		return(0);
  	}
    }
- 
-   /* Check for self-test failure. */
-   if ((stat & (AHA_DIAGF | AHA_INIT | AHA_IDLE | AHA_CDF | AHA_DF))
- 						!= (AHA_INIT | AHA_IDLE)) {
- 	printf("aha0: AHA154x controller failed self-test\n");
- 	return(0);
-   }
- 
-   /* !! maybe a santity check here: make sure IDLE and INIT are set? */
  
    /* Get information about controller type and configuration. */
    cmd[0] = AHACOM_HAINQUIRY;
--- 1852,1867 ----
    /* Reset controller, wait for self test to complete. */
    out_byte(AHA_CNTLREG, AHA_HRST);
    milli_start(&ms);
!   while (((stat = in_byte(AHA_STATREG)) & (AHA_STST | AHA_DIAGF | AHA_INIT
! 		| AHA_IDLE | AHA_CDF | AHA_DF)) != (AHA_INIT | AHA_IDLE))
!   {
  	if (milli_elapsed(&ms) >= AHA_TIMEOUT) {
! 		printf(
! 		  "aha0: AHA154x controller not responding, status = 0x%02x\n",
! 			stat);
  		return(0);
  	}
    }
  
    /* Get information about controller type and configuration. */
    cmd[0] = AHACOM_HAINQUIRY;