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Re: [RFC] mac80211: Prevent possible BUG on suspend.

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On Mon, 2011-12-12 at 00:38 +0100, Dmitry Tarnyagin wrote:
> PM code has a watchdog to trigger a BUG when suspend callback
> is not returning in several seconds. Some WLAN hardware has
> longer timeouts for non-interruptible configuration-related
> operations, leading to the watchdog timeout while
> ieee80211_scan_cancel is waiting on a mutex.

Yuck, fix the device?

> The patch checks if interface mutex is already held and rejects
> suspend if there is a possibility of locking.

That's really not a good plan. This will refuse suspend *all the time*.

johannes


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