On 5/28/07, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
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.
Stupid question time. Wouldn't it just be easier to have request_firmware() keep a copy of the firmware once it's been loaded? We're not talking about a lot of memory that would be wasted, and that way no drivers have to be changed. Ray _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
