bus: mhi: host: pci_generic: Flush recovery worker during freeze

commit c38f83bae4037023827c85e045841d0421f85034 upstream.

It is possible that the recovery work might be running while the freeze
gets executed (during hibernation etc.,). Currently, we don't powerdown
the stack if it is not up but if the recovery work completes after freeze,
then the device will be up afterwards. This will not be a sane situation.

So let's flush the recovery worker before trying to powerdown the device.

Cc: stable@vger.kernel.org
Fixes: 5f0c2ee1fe8d ("bus: mhi: pci-generic: Fix hibernation")
Reported-by: Bhaumik Vasav Bhatt <quic_bbhatt@quicinc.com>
Reviewed-by: Bhaumik Vasav Bhatt <quic_bbhatt@quicinc.com>
Link: https://lore.kernel.org/r/20220408150039.17297-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index 2e8d9b6e500c721c10a6e1801c54e8ef434c4753..0982642a7907ea04eba0809b7fe92e7c124087a8 100644 (file)
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -1020,6 +1020,7 @@ static int __maybe_unused mhi_pci_freeze(struct device *dev)
         * the intermediate restore kernel reinitializes MHI device with new
         * context.
         */
+       flush_work(&mhi_pdev->recovery_work);
        if (test_and_clear_bit(MHI_PCI_DEV_STARTED, &mhi_pdev->status)) {
                mhi_power_down(mhi_cntrl, true);
                mhi_unprepare_after_power_down(mhi_cntrl);