diff mbox series

[v2,2/3] nvme-pci: Make use of "suspend_poweroff" flag during system suspend

Message ID 20220518131913.26974-3-manivannan.sadhasivam@linaro.org (mailing list archive)
State RFC, archived
Headers show
Series PCI: Notify PCI drivers about powerdown during suspend | expand

Commit Message

Manivannan Sadhasivam May 18, 2022, 1:19 p.m. UTC 
On some platforms like Chromebooks based on Qcom SC7280, the power to the
PCI devices will be taken off during system suspend. For these platforms,
the PCI RC will set the "system_poweroff" flag to notify the PCI device
drivers of the poweroff scenario.

Hence, make use of the flag in the system suspend path and if set, properly
shutdown the device.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---

Changes in v2:

* Added Ack from Christoph
* Reworded the commit message to include SC7280

 drivers/nvme/host/pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index d817ca17463e..381bf0c7cf8d 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3238,6 +3238,7 @@  static int nvme_suspend(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct nvme_dev *ndev = pci_get_drvdata(pdev);
+	struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus);
 	struct nvme_ctrl *ctrl = &ndev->ctrl;
 	int ret = -EBUSY;
 
@@ -3257,7 +3258,7 @@  static int nvme_suspend(struct device *dev)
 	 * state (which may not be possible if the link is up).
 	 */
 	if (pm_suspend_via_firmware() || !ctrl->npss ||
-	    !pcie_aspm_enabled(pdev) ||
+	    !pcie_aspm_enabled(pdev) || bridge->suspend_poweroff ||
 	    (ndev->ctrl.quirks & NVME_QUIRK_SIMPLE_SUSPEND))
 		return nvme_disable_prepare_reset(ndev, true);