On Thu, Apr 20, 2023 at 09:58:30AM +0800, Kai-Heng Feng wrote: > PCIe service that shares IRQ with PME may cause spurious wakeup on > system suspend. > > Since AER is conditionally disabled in previous patch, also apply the > same logic to disable DPC which depends on AER to work. > > PCIe Base Spec 5.0, section 5.2 "Link State Power Management" states > that TLP and DLLP transmission is disabled for a Link in L2/L3 Ready > (D3hot), L2 (D3cold with aux power) and L3 (D3cold), so we don't lose > much here to disable DPC during system suspend. > > This is very similar to previous attempts to suspend AER and DPC [1], > but with a different reason. > > [1] https://lore.kernel.org/linux-pci/20220408153159.106741-1-kai.heng.feng@xxxxxxxxxxxxx/ > Link: https://bugzilla.kernel.org/show_bug.cgi?id=216295 > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
