On Monday, 28 May 2007 17:55, Alan Stern wrote:
> You're using the PM_PRE_FREEZE and PM_POST_THAW notifiers for both this
> and the userspace helper change. Is it your intention that drivers
> should continue to request these services but encounter an error if the
> request occurs at the wrong time? Or do you expect drivers to use the
> notifier chains to know when they shouldn't make any requests?
In fact, I'd like drivers to use notifiers to actually load the firmware into
memory before hibernation/suspend. Namely, if there's PM_PRE_FREEZE, the
driver calls request_firmware() from within the notifier and saves the firmware
in memory for future use, if need be. Later, when PM_POST_THAW comes, the
memory holding the firmware is released.
Unfortunately there are drivers that call request_firmware() directly from
.resume() which blocks until timeout expires and fails anyway. I just wanted
this to fail immediately, without waiting.