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Date: Mon, 24 Jan 2022 19:32:55 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Bhaumik Bhatt <bbhatt@...eaurora.org>, Hemant Kumar <hemantk@...eaurora.org>, Manivannan Sadhasivam <mani@...nel.org>, Loic Poulain <loic.poulain@...aro.org>, Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> Subject: [PATCH 5.15 058/846] bus: mhi: pci_generic: Graceful shutdown on freeze From: Loic Poulain <loic.poulain@...aro.org> commit f77097ec8c0141a4b5cf3722a246be0cb5677e29 upstream. 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. Link: https://lore.kernel.org/r/1635268180-13699-1-git-send-email-loic.poulain@linaro.org Fixes: 5f0c2ee1fe8d ("bus: mhi: pci-generic: Fix hibernation") Cc: stable@...r.kernel.org Suggested-by: Bhaumik Bhatt <bbhatt@...eaurora.org> Reviewed-by: Bhaumik Bhatt <bbhatt@...eaurora.org> Reviewed-by: Hemant Kumar <hemantk@...eaurora.org> Reviewed-by: Manivannan Sadhasivam <mani@...nel.org> Signed-off-by: Loic Poulain <loic.poulain@...aro.org> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> Link: https://lore.kernel.org/r/20211216081227.237749-3-manivannan.sadhasivam@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/bus/mhi/pci_generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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 * 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); }
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