From: Manivannan Sadhasivam <mani@kernel.org>
To: Loic Poulain <loic.poulain@linaro.org>
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
bbhatt@codeaurora.org, stable@vger.kernel.org
Subject: Re: [PATCH v2] mhi: pci_generic: Graceful shutdown on freeze
Date: Fri, 29 Oct 2021 14:58:06 +0530 [thread overview]
Message-ID: <20211029092806.GB4945@thinkpad> (raw)
In-Reply-To: <1635268180-13699-1-git-send-email-loic.poulain@linaro.org>
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@vger.kernel.org
> Fixes: 5f0c2ee1fe8d ("bus: mhi: pci-generic: Fix hibernation")
> Suggested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
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
>
next prev parent reply other threads:[~2021-10-29 9:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-26 17:09 [PATCH v2] mhi: pci_generic: Graceful shutdown on freeze Loic Poulain
2021-10-29 9:28 ` Manivannan Sadhasivam [this message]
2021-11-18 6:17 ` Manivannan Sadhasivam
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