Re: [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up

[Manivannan Sadhasivam]

On Thu, May 06, 2021 at 12:51:41PM -0700, Bhaumik Bhatt wrote:
> Set the BHI and BHIe pointers to NULL as part of clean-up. This
> makes sure that stale pointers are not accessed after powering
> MHI down.
> 
> Suggested-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx>
> Signed-off-by: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx>
> Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>
> Reviewed-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx>

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

Thanks,
Mani

> ---
>  drivers/bus/mhi/core/init.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index 11c7a3d..1cc2f22 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -1132,6 +1132,9 @@ void mhi_unprepare_after_power_down(struct mhi_controller *mhi_cntrl)
>  		mhi_cntrl->rddm_image = NULL;
>  	}
>  
> +	mhi_cntrl->bhi = NULL;
> +	mhi_cntrl->bhie = NULL;
> +
>  	mhi_deinit_dev_ctxt(mhi_cntrl);
>  }
>  EXPORT_SYMBOL_GPL(mhi_unprepare_after_power_down);
> -- 
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