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SubjectRe: [PATCH v3 1/6] bus: mhi: core: Make sure to powerdown if mhi_sync_power_up fails
On Mon, Apr 27, 2020 at 09:59:08AM -0600, Jeffrey Hugo wrote:
> Powerdown is necessary if mhi_sync_power_up fails due to a timeout, to
> clean up the resources. Otherwise a BUG could be triggered when
> attempting to clean up MSIs because the IRQ is still active from a
> request_irq().
>
> Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thanks,
Mani

> ---
> drivers/bus/mhi/core/pm.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
> index 52690cb..dc83d65 100644
> --- a/drivers/bus/mhi/core/pm.c
> +++ b/drivers/bus/mhi/core/pm.c
> @@ -902,7 +902,11 @@ int mhi_sync_power_up(struct mhi_controller *mhi_cntrl)
> MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
> msecs_to_jiffies(mhi_cntrl->timeout_ms));
>
> - return (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -EIO;
> + ret = (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -ETIMEDOUT;
> + if (ret)
> + mhi_power_down(mhi_cntrl, false);
> +
> + return ret;
> }
> EXPORT_SYMBOL(mhi_sync_power_up);
>
> --
> Qualcomm Technologies, Inc. is a member of the
> Code Aurora Forum, a Linux Foundation Collaborative Project.

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