Re: [PATCH v2 0/3] mac80211 suspend/resume

[Johannes Berg <johannes@sipsolutions.net>]

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On Sat, 2009-01-10 at 01:53 +0200, Tomas Winkler wrote:

> I second this by stressing another issue. in the point that
> suspend/resume events shell be present to user space regardless of
> mac80211 specific talk with wpa_supplicant. Not only Wifi but also in
> my knowledge BT and other coms need user space application
> to close gracefully connection before kernel shuts in down.

But userspace is usually the one _invoking_ the suspend, so what I was
trying to say is that we don't care what userspace did right before
invoking suspend.

> Even sometime leavening shutting down interface managing application
> may reduce the crosstalk so that driver doesn't have go guess when
> application has finished it's shutdown. rtnl is probably not enough as
> there is still race who grabs it first.

No, the rtnl definitely is enough right now since userspace will do
whatever it needs to _before_ invoking the kernel suspend.

I say we should just put these patches in as they are.

johannes

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