kern/103841: commit references a PR

[dfilter service]

The following reply was made to PR kern/103841; it has been noted by GNATS.

From: dfilter at FreeBSD.ORG (dfilter service)
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: kern/103841: commit references a PR
Date: Fri, 14 Sep 2007 23:44:17 +0000 (UTC)

 jkim        2007-09-14 23:44:11 UTC
 
   FreeBSD src repository
 
   Modified files:        (Branch: RELENG_6)
     sys/dev/fdc          fdc.c 
     sys/dev/ic           nec765.h 
     sys/pc98/cbus        fdc.c 
   Log:
   MFC:    sys/dev/fdc/fdc.c       1.310-1.313
           sys/dev/ic/nec765.h     1.12, 1.13
           sys/dev/pc98/fdc.c      1.167
   
   - Enhanced floppy controllers have Data Rate Select Register (DSR) at 0x3f4.
   Use it to reset controller and to select data rate.  According to Intel
   80277AA datasheet, software reset behaves the same as DOR reset except
   that it is self clearing.  National Semiconductor PC8477B datasheet says
   the same.  As a side effect, we no longer use Configuration Control
   Register (CCR) at 0x3f7 for these controllers, which is often missing
   in modern hardware.
   - Assume floppy disk is not inserted when we have exhausted retries.  This
   significantly reduces booting time when there is broken floppy disk drive,
   controller, cable, BIOS, etc.
   When the floppy controller interface is correctly implemented, disk change
   signal (DSKCHG) is reflected in the Digital Input Register (DIR) at 0x3f7.
   However, there are many cases that the signal is unusable.  Moreover, some
   BIOS does not reserve the port at all.  In those cases, the register may not
   function.
   - Fix style nits.
   
   PR:     kern/103841
   
   Revision   Changes    Path
   1.307.2.4  +27 -8     src/sys/dev/fdc/fdc.c
   1.11.8.1   +29 -23    src/sys/dev/ic/nec765.h
   1.160.2.4  +2 -2      src/sys/pc98/cbus/fdc.c
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