On Tue, Oct 26, 2021 at 07:09:40PM +0200, Loic Poulain wrote:
> There is no reason for shutting down MHI ungracefully on freeze,
> this causes the MHI host stack & device stack to not be aligned
> anymore since the proper MHI reset sequence is not performed for
> ungraceful shutdown.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 5f0c2ee1fe8d ("bus: mhi: pci-generic: Fix hibernation")
> Suggested-by: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx>
> Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
> Reviewed-by: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx>
> Reviewed-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Thanks,
Mani
> ---
> v2: Forgot to mention this change comes from a Bhaumik suggestion
>
> drivers/bus/mhi/pci_generic.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
> index 6a42425..d4a3ce2 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -1018,7 +1018,7 @@ static int __maybe_unused mhi_pci_freeze(struct device *dev)
> * context.
> */
> if (test_and_clear_bit(MHI_PCI_DEV_STARTED, &mhi_pdev->status)) {
> - mhi_power_down(mhi_cntrl, false);
> + mhi_power_down(mhi_cntrl, true);
> mhi_unprepare_after_power_down(mhi_cntrl);
> }
>
> --
> 2.7.4
>
