linux-kernel - Re: [PATCH] usb: cdns3: Removes duplicated call to the cdns3_exit

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Date:   Thu, 13 Aug 2020 09:25:20 +0000
From:   Peter Chen <peter.chen@....com>
To:     Pawel Laszczak <pawell@...ence.com>
CC:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "balbi@...nel.org" <balbi@...nel.org>,
        "rogerq@...com" <rogerq@...com>,
        "weiyongjun1@...wei.com" <weiyongjun1@...wei.com>,
        "jpawar@...ence.com" <jpawar@...ence.com>,
        "kurahul@...ence.com" <kurahul@...ence.com>,
        "sparmar@...ence.com" <sparmar@...ence.com>
Subject: Re: [PATCH] usb: cdns3: Removes duplicated call to the
 cdns3_exit_roles function

On 20-08-13 09:10:54, Pawel Laszczak wrote:
> To avoid double calling of function cdns3_exit_roles when initialization
> failed
need ","

> patch removes invoking this function from cdns3_core_init_role.
> This function is invoked again from cdns3_probe when
> cdns3_core_init_role returns error code.

If you delete the cdns3_exit_roles here, where it will be called again?
I only see cdns3_exit_roles is called at .remove callback.

Peter
> 
> Signed-off-by: Pawel Laszczak <pawell@...ence.com>
> ---
>  drivers/usb/cdns3/core.c | 20 ++++++++------------
>  1 file changed, 8 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
> index 5c1586ec7824..c22c7224642a 100644
> --- a/drivers/usb/cdns3/core.c
> +++ b/drivers/usb/cdns3/core.c
> @@ -132,7 +132,7 @@ static int cdns3_core_init_role(struct cdns3 *cdns)
>  		if (ret) {
>  			dev_err(dev, "Host initialization failed with %d\n",
>  				ret);
> -			goto err;
> +			return ret;
>  		}
>  	}
>  
> @@ -141,7 +141,7 @@ static int cdns3_core_init_role(struct cdns3 *cdns)
>  		if (ret) {
>  			dev_err(dev, "Device initialization failed with %d\n",
>  				ret);
> -			goto err;
> +			return ret;
>  		}
>  	}
>  
> @@ -149,38 +149,34 @@ static int cdns3_core_init_role(struct cdns3 *cdns)
>  
>  	ret = cdns3_drd_update_mode(cdns);
>  	if (ret)
> -		goto err;
> +		return ret;
>  
>  	/* Initialize idle role to start with */
>  	ret = cdns3_role_start(cdns, USB_ROLE_NONE);
>  	if (ret)
> -		goto err;
> +		return ret;
>  
>  	switch (cdns->dr_mode) {
>  	case USB_DR_MODE_OTG:
>  		ret = cdns3_hw_role_switch(cdns);
>  		if (ret)
> -			goto err;
> +			return ret;
>  		break;
>  	case USB_DR_MODE_PERIPHERAL:
>  		ret = cdns3_role_start(cdns, USB_ROLE_DEVICE);
>  		if (ret)
> -			goto err;
> +			return ret;
>  		break;
>  	case USB_DR_MODE_HOST:
>  		ret = cdns3_role_start(cdns, USB_ROLE_HOST);
>  		if (ret)
> -			goto err;
> +			return ret;
>  		break;
>  	default:
> -		ret = -EINVAL;
> -		goto err;
> +		return -EINVAL;
>  	}
>  
>  	return 0;
> -err:
> -	cdns3_exit_roles(cdns);
> -	return ret;
>  }
>  
>  /**
> -- 
> 2.17.1
> 

-- 

Thanks,
Peter Chen