linux-kernel - Re: [PATCH] staging: r8188eu: clean up error handling in rtw_start_drv

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Date:   Sun, 6 Nov 2022 20:05:06 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Michael Straube <straube.linux@...il.com>
Cc:     gregkh@...uxfoundation.org, Larry.Finger@...inger.net,
        phil@...lpotter.co.uk, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: r8188eu: clean up error handling in
 rtw_start_drv_threads()

On Sun, Nov 06, 2022 at 02:34:43PM +0100, Michael Straube wrote:
> Convert the error handling in the function rtw_start_drv_threads() to
> the common logic used in the kernel. Another step to get rid of _FAIL
> and _SUCCESS which uses inverted logic.

Hello Michael,
Can you please tell how did you find this opportunity for improvement? Are you
using some tool or is it a manual code review/analysis?

Thank you,
./drv

>
> Signed-off-by: Michael Straube <straube.linux@...il.com>
> ---
>  drivers/staging/r8188eu/include/osdep_intf.h |  2 +-
>  drivers/staging/r8188eu/os_dep/os_intfs.c    | 17 +++++++----------
>  2 files changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/staging/r8188eu/include/osdep_intf.h b/drivers/staging/r8188eu/include/osdep_intf.h
> index 0f7d74a3ff6d..6d66cb57225e 100644
> --- a/drivers/staging/r8188eu/include/osdep_intf.h
> +++ b/drivers/staging/r8188eu/include/osdep_intf.h
> @@ -46,7 +46,7 @@ u8 rtw_init_drv_sw(struct adapter *padapter);
>  void rtw_free_drv_sw(struct adapter *padapter);
>  void rtw_reset_drv_sw(struct adapter *padapter);
>
> -u32 rtw_start_drv_threads(struct adapter *padapter);
> +int rtw_start_drv_threads(struct adapter *padapter);
>  void rtw_stop_drv_threads (struct adapter *padapter);
>  void rtw_cancel_all_timer(struct adapter *padapter);
>
> diff --git a/drivers/staging/r8188eu/os_dep/os_intfs.c b/drivers/staging/r8188eu/os_dep/os_intfs.c
> index 970f380bac96..66556e07ed93 100644
> --- a/drivers/staging/r8188eu/os_dep/os_intfs.c
> +++ b/drivers/staging/r8188eu/os_dep/os_intfs.c
> @@ -363,18 +363,16 @@ struct net_device *rtw_init_netdev(struct adapter *old_padapter)
>  	return pnetdev;
>  }
>
> -u32 rtw_start_drv_threads(struct adapter *padapter)
> +int rtw_start_drv_threads(struct adapter *padapter)
>  {
> -	u32 _status = _SUCCESS;
> -
>  	padapter->cmdThread = kthread_run(rtw_cmd_thread, padapter, "RTW_CMD_THREAD");
>  	if (IS_ERR(padapter->cmdThread))
> -		_status = _FAIL;
> -	else
> -		/* wait for rtw_cmd_thread() to start running */
> -		wait_for_completion(&padapter->cmdpriv.start_cmd_thread);
> +		return PTR_ERR(padapter->cmdThread);
>
> -	return _status;
> +	/* wait for rtw_cmd_thread() to start running */
> +	wait_for_completion(&padapter->cmdpriv.start_cmd_thread);
> +
> +	return 0;
>  }
>
>  void rtw_stop_drv_threads(struct adapter *padapter)
> @@ -627,8 +625,7 @@ static int _netdev_open(struct net_device *pnetdev)
>
>  		netdev_dbg(pnetdev, "MAC Address = %pM\n", pnetdev->dev_addr);
>
> -		status = rtw_start_drv_threads(padapter);
> -		if (status == _FAIL) {
> +		if (rtw_start_drv_threads(padapter)) {
>  			pr_info("Initialize driver software resource Failed!\n");
>  			goto netdev_open_error;
>  		}
> --
> 2.38.0
>
>