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

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commit c38f83bae4 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: 5f0c2ee1fe ("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>
This commit is contained in:
Manivannan Sadhasivam
2022-04-08 20:30:39 +05:30
committed by Greg Kroah-Hartman
parent b3d21deabc
commit 34b5d2aa35
1 changed files with 1 additions and 0 deletions
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1
drivers/bus/mhi/pci_generic.c
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@@ -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);