On Thu, 2012-04-12 at 04:09 +0600, Andrey Rahmatullin wrote:
> On Wed, Apr 11, 2012 at 05:13:51PM -0400, Alan Stern wrote:
> > > I replaced the hcd_pci_suspend_noirq call with retval=0 and suspend/resume
> > > was successful.
> >
> > This indicates that your computer doesn't like to suspend while the
> > EHCI controllers are in D3hot. I have no idea why not.
> >
> > If you want a really thorough test, try changing
> > drivers/pci/pci-driver.c:pci_pm_suspend_noirq. In the "if (!pm)"
> > clause, add a call to
> >
> > pci_prepare_to_sleep(pci_dev);
> >
> > just after the pci_save_state line. Then try suspending with the
> > script enabled (ehci-hcd unbound from the controllers). If this fails
> > then we'll know it is the source of the trouble.
> Looks like it works even with this line added.
>
I reverted the retval change (that worked) and added this line. Put the
script back and did a suspend. The suspend and resume worked without
issue.
Here's my change just in case I did it incorrectly:
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 12d1e81..e026390 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -713,6 +713,7 @@ static int pci_pm_suspend_noirq(struct device *dev)
if (!pm) {
pci_save_state(pci_dev);
+ pci_prepare_to_sleep(pci_dev);
return 0;
}
-- Steve
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