linux-kernel - Re: [PATCH] ath11k: use MHI provided APIs to allocate and free MHI controller

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Date:   Tue, 17 Nov 2020 09:06:48 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>
Cc:     kvalo@...eaurora.org, linux-arm-msm@...r.kernel.org,
        hemantk@...eaurora.org, jhugo@...eaurora.org,
        linux-kernel@...r.kernel.org, ath11k@...ts.infradead.org
Subject: Re: [PATCH] ath11k: use MHI provided APIs to allocate and free MHI
 controller

+ath11k list

On Mon, Nov 16, 2020 at 04:01:40PM -0800, Bhaumik Bhatt wrote:
> Use MHI provided APIs to allocate and free MHI controller to
> improve MHI host driver handling. This also fixes a memory leak
> as the MHI controller was allocated but never freed.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>

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

Thanks,
Mani

> ---
>  drivers/net/wireless/ath/ath11k/mhi.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/wireless/ath/ath11k/mhi.c b/drivers/net/wireless/ath/ath11k/mhi.c
> index aded9a7..1c9d9dc 100644
> --- a/drivers/net/wireless/ath/ath11k/mhi.c
> +++ b/drivers/net/wireless/ath/ath11k/mhi.c
> @@ -218,7 +218,7 @@ int ath11k_mhi_register(struct ath11k_pci *ab_pci)
>  	struct mhi_controller *mhi_ctrl;
>  	int ret;
>  
> -	mhi_ctrl = kzalloc(sizeof(*mhi_ctrl), GFP_KERNEL);
> +	mhi_ctrl = mhi_alloc_controller();
>  	if (!mhi_ctrl)
>  		return -ENOMEM;
>  
> @@ -234,7 +234,7 @@ int ath11k_mhi_register(struct ath11k_pci *ab_pci)
>  	ret = ath11k_mhi_get_msi(ab_pci);
>  	if (ret) {
>  		ath11k_err(ab, "failed to get msi for mhi\n");
> -		kfree(mhi_ctrl);
> +		mhi_free_controller(mhi_ctrl);
>  		return ret;
>  	}
>  
> @@ -252,7 +252,7 @@ int ath11k_mhi_register(struct ath11k_pci *ab_pci)
>  	ret = mhi_register_controller(mhi_ctrl, &ath11k_mhi_config);
>  	if (ret) {
>  		ath11k_err(ab, "failed to register to mhi bus, err = %d\n", ret);
> -		kfree(mhi_ctrl);
> +		mhi_free_controller(mhi_ctrl);
>  		return ret;
>  	}
>  
> @@ -265,6 +265,7 @@ void ath11k_mhi_unregister(struct ath11k_pci *ab_pci)
>  
>  	mhi_unregister_controller(mhi_ctrl);
>  	kfree(mhi_ctrl->irq);
> +	mhi_free_controller(mhi_ctrl);
>  }
>  
>  static char *ath11k_mhi_state_to_str(enum ath11k_mhi_state mhi_state)
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>