On Fri, Mar 19, 2021 at 04:50:37PM +0100, Loic Poulain wrote:
> 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>
Thanks,
Mani
> ---
> 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 cbd2224..b104ab8 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -532,6 +532,12 @@ 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);
> @@ -704,6 +710,7 @@ 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
> };
> --
> 2.7.4
>
