This new approach drops the is_off change that was part of v4. That was kind of beyond the scope of this patchset. This new approach changes the boot_keep_on in such a way that we won't need any kind of new locking for a PD. This involves using the patch [1] for adding dev_set_drv_sync_state from Saravana for allowing the genpd core to set a default sync state callback for a provider that doesn't register one by itself. While at it, we can add another such API but this time to query a device's sync state. Then, we filter out each power off request in such a way that if a boot powered on power domain is not attached to its consumer device and the provider has not state synced yet, the power off request is skipped. [1] https://lore.kernel.org/all/20210407034456.516204-2-saravanak@xxxxxxxxxx/ No worth mentioning what changed since v4 as this version is almost entirely reworked. Abel Vesa (3): driver core: Add dev_is_drv_state_synced() PM: domains: Ignore power off request for enabled unused domains PM: domains: Add and set generic sync state callback Saravana Kannan (1): driver core: Add dev_set_drv_sync_state() drivers/base/power/domain.c | 72 +++++++++++++++++++++++++++++++++++++ include/linux/device.h | 26 ++++++++++++++ include/linux/pm_domain.h | 4 +++ 3 files changed, 102 insertions(+) -- 2.34.1
