From 7e341061ddd9239f7214fc3abb794f0ed977e259 Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Mon, 29 Jun 2020 12:16:46 +0800 Subject: HID: intel-ish-hid: Replace PCI_DEV_FLAGS_NO_D3 with pci_save_state PCI_DEV_FLAGS_NO_D3 should not be used outside of PCI core. Instead, we can use pci_save_state() to hint PCI core that the device should stay at D0 during suspend. By doing so, PCI core will let the upstream bridges also stays at D0 so the entire hierarchy is in the correct power state as PCI spec mandates. Signed-off-by: Kai-Heng Feng Acked-by: Srinivas Pandruvada Signed-off-by: Jiri Kosina --- drivers/hid/intel-ish-hid/ipc/pci-ish.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'drivers/hid') diff --git a/drivers/hid/intel-ish-hid/ipc/pci-ish.c b/drivers/hid/intel-ish-hid/ipc/pci-ish.c index f491d8b4e24c..c6d48a8648b7 100644 --- a/drivers/hid/intel-ish-hid/ipc/pci-ish.c +++ b/drivers/hid/intel-ish-hid/ipc/pci-ish.c @@ -106,6 +106,11 @@ static inline bool ish_should_enter_d0i3(struct pci_dev *pdev) return !pm_suspend_via_firmware() || pdev->device == CHV_DEVICE_ID; } +static inline bool ish_should_leave_d0i3(struct pci_dev *pdev) +{ + return !pm_resume_via_firmware() || pdev->device == CHV_DEVICE_ID; +} + /** * ish_probe() - PCI driver probe callback * @pdev: pci device @@ -215,9 +220,7 @@ static void __maybe_unused ish_resume_handler(struct work_struct *work) struct ishtp_device *dev = pci_get_drvdata(pdev); int ret; - /* Check the NO_D3 flag to distinguish the resume paths */ - if (pdev->dev_flags & PCI_DEV_FLAGS_NO_D3) { - pdev->dev_flags &= ~PCI_DEV_FLAGS_NO_D3; + if (ish_should_leave_d0i3(pdev) && !dev->suspend_flag) { disable_irq_wake(pdev->irq); ishtp_send_resume(dev); @@ -281,8 +284,11 @@ static int __maybe_unused ish_suspend(struct device *device) */ ish_disable_dma(dev); } else { - /* Set the NO_D3 flag, the ISH would enter D0i3 */ - pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3; + /* + * Save state so PCI core will keep the device at D0, + * the ISH would enter D0i3 + */ + pci_save_state(pdev); enable_irq_wake(pdev->irq); } -- cgit v1.2.3