From: Loic Poulain <loic.poulain@xxxxxxxxxx> [ Upstream commit 757072abe1c0b67cb226936c709291889658a222 ] Deinit the device on shutdown to halt MHI/PCI operation on device side. This change fixes floating device state with some hosts that do not fully shutdown PCIe device when rebooting. Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Link: https://lore.kernel.org/r/1616169037-7969-1-git-send-email-loic.poulain@xxxxxxxxxx Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/bus/mhi/pci_generic.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c index 356c19ce4bbf..ef549c695b55 100644 --- a/drivers/bus/mhi/pci_generic.c +++ b/drivers/bus/mhi/pci_generic.c @@ -516,6 +516,12 @@ static void mhi_pci_remove(struct pci_dev *pdev) mhi_unregister_controller(mhi_cntrl); } +static void mhi_pci_shutdown(struct pci_dev *pdev) +{ + mhi_pci_remove(pdev); + pci_set_power_state(pdev, PCI_D3hot); +} + static void mhi_pci_reset_prepare(struct pci_dev *pdev) { struct mhi_pci_device *mhi_pdev = pci_get_drvdata(pdev); @@ -686,6 +692,7 @@ static struct pci_driver mhi_pci_driver = { .id_table = mhi_pci_id_table, .probe = mhi_pci_probe, .remove = mhi_pci_remove, + .shutdown = mhi_pci_shutdown, .err_handler = &mhi_pci_err_handler, .driver.pm = &mhi_pci_pm_ops }; -- 2.30.2
