On Wed, 2006-11-15 at 01:54 +0100, Christian Hoffmann wrote:
> On Tuesday 14 November 2006 23:07, Benjamin Herrenschmidt wrote:
> > > I tried that patch, but the last message I see over netconsole (using
> > > tg3) is: Suspending console(s)
> > > and then nothing. Nothing on resume at all :(
> > >
> > > Adding some printks in the radeonfb_pci_suspend and radeonfb_pci_resume
> > > (radeon_pm.c) didn't help: I don't see them. But I am not a kernel
> > > programmer at all, so I might do something wrong or in the wrong place.
> >
> > Does it resume if you make radeon_pci_resume() a nop ?
> >
> > Of course, the fbdev will not come back, but will the machine overall
> > resume ?
> >
> > Ben.
> Yes, if i make radeon_pci_resume a nop, the machine resumes if i do a return 0
> immediately.
> I think I tracked it down to the call to acquire_console_sem() as the
> following code makes the machine hang again:
>
> int radeonfb_pci_resume(struct pci_dev *pdev)
> {
> struct fb_info *info = pci_get_drvdata(pdev);
> struct radeonfb_info *rinfo = info->par;
> int rc = 0;
> if (pdev->dev.power.power_state.event == PM_EVENT_ON)
> return 0;
> if (rinfo->no_schedule) {
> /* if (try_acquire_console_sem())*/
> return 0;
> } else
> acquire_console_sem();
>
> return 0;
> ...
Well, if you acquire the console sem you need to release it too :-)
Ben.
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