Commit f23a0cea authored by Leon Yen's avatar Leon Yen Committed by Felix Fietkau
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wifi: mt76: mt7921e: add pci .shutdown() support 



Some combinations of hosts cannnot detect mt7921e after reboot. The
interoperability issue is caused by the status mismatch between host
and chip fw. In such cases, the driver should stop chip activities
and reset chip to default state before reboot.

Suggested-by: default avatar <angelogioacchino.delregno@collabora.com>
Co-developed-by: default avatarDeren Wu <deren.wu@mediatek.com>
Signed-off-by: default avatarDeren Wu <deren.wu@mediatek.com>
Signed-off-by: default avatarLeon Yen <Leon.Yen@mediatek.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 6a70a90d

drivers/net/wireless/mediatek/mt76/mt7921/pci.c

+16 −0
Original line number Diff line number Diff line
@@ -507,6 +507,21 @@ static int mt7921_pci_resume(struct device *device) 
	return err;

}



static void mt7921_pci_shutdown(struct pci_dev *pdev)

{

	struct mt76_dev *mdev = pci_get_drvdata(pdev);

	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);

	struct mt76_connac_pm *pm = &dev->pm;



	cancel_delayed_work_sync(&pm->ps_work);

	cancel_work_sync(&pm->wake_work);



	/* chip cleanup before reboot */

	mt7921_mcu_drv_pmctrl(dev);

	mt7921_dma_cleanup(dev);

	mt7921_wfsys_reset(dev);

}



static DEFINE_SIMPLE_DEV_PM_OPS(mt7921_pm_ops, mt7921_pci_suspend, mt7921_pci_resume);



static struct pci_driver mt7921_pci_driver = {
@@ -514,6 +529,7 @@ static struct pci_driver mt7921_pci_driver = { 
	.id_table	= mt7921_pci_device_table,

	.probe		= mt7921_pci_probe,

	.remove		= mt7921_pci_remove,

	.shutdown	= mt7921_pci_shutdown,

	.driver.pm	= pm_sleep_ptr(&mt7921_pm_ops),

};