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From: =?ISO-8859-1?Q?Mikko_Ty=F6l=E4j=E4rvi?= <mbsd@pacbell.net>
Subject: Re: ports/57465 kldunload rtc.ko causes a panic; yet it's in rc.d
 script
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The following reply was made to PR ports/57465; it has been noted by GNATS.

From: =?ISO-8859-1?Q?Mikko_Ty=F6l=E4j=E4rvi?= <mbsd@pacbell.net>
To: freebsd-gnats-submit@FreeBSD.org, w@expro.pl
Cc:  
Subject: Re: ports/57465 kldunload rtc.ko causes a panic; yet it's in rc.d
 script
Date: Thu, 2 Oct 2003 08:45:19 -0700 (PDT)

 I ran into this some time ago, and found that you get different
 results depending on whether the device has been opened or not.
 
 Have you tried kldunloading "rtc" w/o using it first, e.g. directly
 after boot?
 
 I've been using the following patch for a while:
 
 --- rtc.c.org   Wed Aug 20 20:41:50 2003
 +++ rtc.c       Thu Oct  2 08:40:37 2003
 @@ -299,7 +299,8 @@
                 DLog(Lfail, "%p busy", sc);
                 return error;
         }
 -       destroy_dev(rtc_dev);
 +       if (sc == NULL)
 +               destroy_dev(rtc_dev);
  #if __FreeBSD_version < 500104
         error = cdevsw_remove(&rtc_cdevsw);
  #endif
 
 Which seems to work find for me in all cases.  I made a mental note to
 submit a PR once I've tested out the fix, and then of course, I forgot
 all about it... :)
 
    $.02,
    /Mikko