Re: [patch] properly stop devices before poweroff

[Andrew Morton <akpm@osdl.org>]

Zwane Mwaikambo <zwane@arm.linux.org.uk> wrote:
>
> On Fri, 29 Apr 2005, Andrew Morton wrote:
> 
> > Pavel Machek <pavel@ucw.cz> wrote:
> > >
> > > 
> > > Without this patch, Linux provokes emergency disk shutdowns and
> > > similar nastiness. It was in SuSE kernels for some time, IIRC.
> > > 
> > 
> > With this patch when running `halt -p' my ia64 Tiger (using
> > tiger_defconfig) gets a stream of badnesses in iosapic_unregister_intr()
> > and then hangs up.
> > 
> > Unfortunately it all seems to happen after the serial port has been
> > disabled because nothing comes out.  I set the console to a squitty font
> > and took a piccy.  See
> > http://www.zip.com.au/~akpm/linux/patches/stuff/dsc02505.jpg
> > 
> > I guess it's an ia64 problem.  I'll leave the patch in -mm for now.
> 
> Could you cat /proc/interrupts during runtime?

           CPU0       CPU1       CPU2       CPU3       
 28:          0          0          0          0          LSAPIC  cpe_poll
 29:          0          0          0          0          LSAPIC  cmc_poll
 30:          0          0          0          0  IO-SAPIC-level  cpe_hndlr
 31:          0          0          0          0          LSAPIC  cmc_hndlr
 34:         19          0          0          0   IO-SAPIC-edge  ide0
 39:          0          0          0          0  IO-SAPIC-level  acpi
 48:        382          0          0          0  IO-SAPIC-level  eth0
 49:          0       2835          0          0  IO-SAPIC-level  ioc0
 50:          0          0         29          0  IO-SAPIC-level  ioc1
 51:          0          0          0          0  IO-SAPIC-level  uhci_hcd:usb1
 52:         51          0          0          0  IO-SAPIC-level  uhci_hcd:usb2
232:          0          0          0          0          LSAPIC  mca_rdzv
238:          0          0          0          0          LSAPIC  perfmon
239:     122785     128748     129310     130523          LSAPIC  timer
240:          0          0          0          0          LSAPIC  mca_wkup
254:         29         77        101        102          LSAPIC  IPI
ERR:          0

> It looks like the device 
> being suspended never went through pci_device_enable() (e.g. ethernet 
> interface wasn't up). It's harmless right now.

Everything's up.  Perhaps we're trying to disable devices more than once?
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