linux-kernel - Re: [PATCH v4 4/6] ath11k: set register access length for MHI driver

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Date:   Fri, 21 May 2021 19:21:52 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org, linux-wireless@...r.kernel.org,
        kvalo@...eaurora.org, ath11k@...ts.infradead.org
Subject: Re: [PATCH v4 4/6] ath11k: set register access length for MHI driver

On Thu, May 06, 2021 at 12:51:43PM -0700, Bhaumik Bhatt wrote:
> MHI driver requires register space length to add range checks and
> prevent memory region accesses outside of that for MMIO space.
> Set it before registering the MHI controller.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
> Reviewed-by: Hemant Kumar <hemantk@...eaurora.org>

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

Kalle, should we do immutable branch for this patch or I can pick it up via MHI
tree (if there are no other patches expected from ath11k for this controller)?

Thanks,
Mani

> ---
>  drivers/net/wireless/ath/ath11k/mhi.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/wireless/ath/ath11k/mhi.c b/drivers/net/wireless/ath/ath11k/mhi.c
> index 09858e5..c0f013c 100644
> --- a/drivers/net/wireless/ath/ath11k/mhi.c
> +++ b/drivers/net/wireless/ath/ath11k/mhi.c
> @@ -235,6 +235,7 @@ int ath11k_mhi_register(struct ath11k_pci *ab_pci)
>  	mhi_ctrl->cntrl_dev = ab->dev;
>  	mhi_ctrl->fw_image = ab_pci->amss_path;
>  	mhi_ctrl->regs = ab->mem;
> +	mhi_ctrl->reg_len = ab->mem_len;
>  
>  	ret = ath11k_mhi_get_msi(ab_pci);
>  	if (ret) {
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>