Re: port-alpha/40077: pmf_system_shutdown(9) breaks reboot(8) on PWS500au

[Nicolas Joly <njoly%pasteur.fr@localhost>]

The following reply was made to PR port-alpha/40077; it has been noted by GNATS.

From: Nicolas Joly <njoly%pasteur.fr@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: port-alpha-maintainer%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost, njoly%pasteur.fr@localhost
Subject: Re: port-alpha/40077: pmf_system_shutdown(9) breaks reboot(8) on 
PWS500au
Date: Mon, 7 Sep 2009 17:27:46 +0200

 On Sun, Sep 06, 2009 at 05:30:05PM +0000, Michael L. Hitch wrote:
 > The following reply was made to PR port-alpha/40077; it has been noted by 
 > GNATS.
 > 
 > From: "Michael L. Hitch" <mhitch%lightning.msu.montana.edu@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc: port-alpha-maintainer%netbsd.org@localhost, 
 > gnats-admin%netbsd.org@localhost, 
 >     netbsd-bugs%netbsd.org@localhost
 > Subject: Re: port-alpha/40077: pmf_system_shutdown(9) breaks reboot(8) on
 >  PWS500au
 > Date: Sun, 6 Sep 2009 11:26:08 -0600 (MDT)
 > 
 >  On Mon, 1 Dec 2008, njoly%pasteur.fr@localhost wrote:
 >  
 >  > No sure about the real fix, but at least removing the 
 > pmf_system_shutdown()
 >  > call from sys/arch/alpha/alpha/machdep.c:cpu_reboot() make reboot/halt
 >  > commands work as expected.
 >  
 >     I ran into a similar type of problem on an old Compaq DL360.  It hung
 >  on any attempt to halt, and required a power cycle to clear.  I did track
 >  it down to the 1.113 revision of sys/dev/pci/pci.c, which disables bus 
 >  master accesses.  You might try to comment out the code in 
 >  pci_child_shutdown() and see if that also makes it work.  If I ever get 
 >  around to getting my PWS500au connected back up, I could also check this, 
 >  but I'm getting deep into the SMP problem at the moment.
 
 Good catch. Commenting the code that disable the bus mastering in
 pci_child_shutdown() make it work, it reboots flawlessly again.
 
 Thanks.
 
 -- 
 Nicolas Joly
 
 Biological Software and Databanks.
 Institut Pasteur, Paris.