Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [alsa-devel] PNP_DRIVER_RES_DISABLE breaks swsusp at least with snd_cs4236 | Date | Sat, 12 Jan 2008 20:08:09 +0100 |
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On Saturday, 12 of January 2008, Rene Herman wrote: > On 12-01-08 16:21, Pierre Ossman wrote: > > > Ah, sorry. It was a different thread. Look for a mail with the subject > > "PNP: do not stop/start devices in suspend/resume path" in the LKML och > > linux-pm archives. > > Right, and I see that the removal of start/stop is already in -mm. That's > not going to work. Something (such as removing power) disabled Ondrej's > CS4236 and the pnp_start_dev() is needed to re-enable it upon resume. > > >> But we certainly need the pnp_start_dev() in the current flow of > >> things. It not being called is the problem this fixes... > > > > I think the previous suggestion was that the drivers should call this, > > not the core, so that it behaved more like other parts of the kernel > > (e.g. PCI). > > It seems all PnP drivers would need to stick a pnp_start_dev in their resume > method
Yes.
> then which means it really belongs in core.
Yes, if practical.
> One important point where PnP and PCI differ is that PnP allows to change the > resources on a protocol level and I don't see how it could ever not be > necessary to restore the state a user may have set if power has been > removed. Hibernate is just that, isn't it?
Basically, yes, it is.
Thanks, Rafael
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