linux-kernel - Re: [PATCH] staging: qlge: Add bool type to qlge_idc

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Date:   Sat, 14 Oct 2023 08:58:13 +0200
From:   Nam Cao <namcao@...utronix.de>
To:     Gilbert Adikankwu <gilbertadikankwu@...il.com>
Cc:     outreachy@...ts.linux.dev, manishc@...vell.com,
        GR-Linux-NIC-Dev@...vell.com, coiby.xu@...il.com,
        gregkh@...uxfoundation.org, netdev@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: qlge: Add bool type to qlge_idc_wait()

On Sat, Oct 14, 2023 at 07:11:59AM +0100, Gilbert Adikankwu wrote:
> Reported by checkpatch:
> 
> WARNING: else is not generally useful after a break or return
>

What checkpatch is telling you here is that the "else" is redundant and
can be removed. Although your patch suppresses the warning, it makes the
code messier :(

Best regards,
Nam

> The idea of the break statements in the if/else is so that the loop is
> exited immediately the value of status is changed. And returned
> immediately. For if/else conditionals, the block to be executed will
> always be one of the two. Introduce a bool type variable 's_sig' that
> evaluates to true when the value of status is changed within the if/else
> block.
> 
> Signed-off-by: Gilbert Adikankwu <gilbertadikankwu@...il.com>
> ---
>  drivers/staging/qlge/qlge.h     | 1 +
>  drivers/staging/qlge/qlge_mpi.c | 8 ++++++--
>  2 files changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/qlge/qlge.h b/drivers/staging/qlge/qlge.h
> index d0dd659834ee..b846bca82571 100644
> --- a/drivers/staging/qlge/qlge.h
> +++ b/drivers/staging/qlge/qlge.h
> @@ -11,6 +11,7 @@
>  #include <linux/netdevice.h>
>  #include <linux/rtnetlink.h>
>  #include <linux/if_vlan.h>
> +#include <linux/types.h>
>  
>  /*
>   * General definitions...
> diff --git a/drivers/staging/qlge/qlge_mpi.c b/drivers/staging/qlge/qlge_mpi.c
> index 96a4de6d2b34..44cb879240a0 100644
> --- a/drivers/staging/qlge/qlge_mpi.c
> +++ b/drivers/staging/qlge/qlge_mpi.c
> @@ -909,6 +909,7 @@ int qlge_mb_wol_set_magic(struct qlge_adapter *qdev, u32 enable_wol)
>  static int qlge_idc_wait(struct qlge_adapter *qdev)
>  {
>  	int status = -ETIMEDOUT;
> +	bool s_sig = false;
>  	struct mbox_params *mbcp = &qdev->idc_mbc;
>  	long wait_time;
>  
> @@ -934,14 +935,17 @@ static int qlge_idc_wait(struct qlge_adapter *qdev)
>  		} else if (mbcp->mbox_out[0] == AEN_IDC_CMPLT) {
>  			netif_err(qdev, drv, qdev->ndev, "IDC Success.\n");
>  			status = 0;
> -			break;
> +			s_sig = true;
>  		} else {
>  			netif_err(qdev, drv, qdev->ndev,
>  				  "IDC: Invalid State 0x%.04x.\n",
>  				  mbcp->mbox_out[0]);
>  			status = -EIO;
> -			break;
> +			s_sig = true;
>  		}
> +
> +		if (s_sig)
> +			break;
>  	}
>  
>  	return status;
> -- 
> 2.34.1
>