Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18;
Date:   Wed, 6 Apr 2022 10:45:46 +0200
From:   Heiko Carstens <hca@linux.ibm.com>
To:     Haowen Bai <baihaowen@meizu.com>,
        Peter Oberparleiter <oberpar@linux.ibm.com>,
        Vineeth Vijayan <vneethv@linux.ibm.com>
Cc:     Vasily Gorbik <gor@linux.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        Sven Schnelle <svens@linux.ibm.com>,
        linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2] s390: Simplify the calculation of variables
Message-ID: <Yk1TOpjLnmUcRQt3@osiris>
References: <Ykq2H+POaGs0GHVU@osiris>
 <1649212651-32038-1-git-send-email-baihaowen@meizu.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1649212651-32038-1-git-send-email-baihaowen@meizu.com>
Precedence: bulk

On Wed, Apr 06, 2022 at 10:37:31AM +0800, Haowen Bai wrote:
> Fix the following coccicheck warnings:
> ./arch/s390/include/asm/scsw.h:695:47-49: WARNING
>  !A || A && B is equivalent to !A || B
> 
> I apply a readable version just to get rid of a warning.
> 
> Signed-off-by: Haowen Bai <baihaowen@meizu.com>
> ---
> V1->V2: apply a readable and simple version as suggestion.
> 
>  arch/s390/include/asm/scsw.h | 47 ++++++++++++++++++++++++++++++--------------
>  1 file changed, 32 insertions(+), 15 deletions(-)

[full quote below]

Vineeth, Peter, could one of you please Review and or ACK the patch
below?

Thank you!

> diff --git a/arch/s390/include/asm/scsw.h b/arch/s390/include/asm/scsw.h
> index a7c3ccf681da..b7e65f96de3c 100644
> --- a/arch/s390/include/asm/scsw.h
> +++ b/arch/s390/include/asm/scsw.h
> @@ -508,9 +508,13 @@ static inline int scsw_cmd_is_valid_zcc(union scsw *scsw)
>   */
>  static inline int scsw_cmd_is_valid_ectl(union scsw *scsw)
>  {
> -	return (scsw->cmd.stctl & SCSW_STCTL_STATUS_PEND) &&
> -	       !(scsw->cmd.stctl & SCSW_STCTL_INTER_STATUS) &&
> -	       (scsw->cmd.stctl & SCSW_STCTL_ALERT_STATUS);
> +	if (!(scsw->tm.stctl & SCSW_STCTL_STATUS_PEND))
> +		return 0;
> +	if (scsw->tm.stctl & SCSW_STCTL_INTER_STATUS)
> +		return 0;
> +	if (scsw->tm.stctl & SCSW_STCTL_ALERT_STATUS)
> +		return 1;
> +	return 0;
>  }
>  
>  /**
> @@ -522,10 +526,15 @@ static inline int scsw_cmd_is_valid_ectl(union scsw *scsw)
>   */
>  static inline int scsw_cmd_is_valid_pno(union scsw *scsw)
>  {
> -	return (scsw->cmd.fctl != 0) &&
> -	       (scsw->cmd.stctl & SCSW_STCTL_STATUS_PEND) &&
> -	       (!(scsw->cmd.stctl & SCSW_STCTL_INTER_STATUS) ||
> -		  (scsw->cmd.actl & SCSW_ACTL_SUSPENDED));
> +	if (!scsw->tm.fctl)
> +		return 0;
> +	if (!(scsw->tm.stctl & SCSW_STCTL_STATUS_PEND))
> +		return 0;
> +	if (!(scsw->tm.stctl & SCSW_STCTL_INTER_STATUS))
> +		return 1;
> +	if (scsw->tm.actl & SCSW_ACTL_SUSPENDED)
> +		return 1;
> +	return 0;
>  }
>  
>  /**
> @@ -675,9 +684,13 @@ static inline int scsw_tm_is_valid_q(union scsw *scsw)
>   */
>  static inline int scsw_tm_is_valid_ectl(union scsw *scsw)
>  {
> -	return (scsw->tm.stctl & SCSW_STCTL_STATUS_PEND) &&
> -	       !(scsw->tm.stctl & SCSW_STCTL_INTER_STATUS) &&
> -	       (scsw->tm.stctl & SCSW_STCTL_ALERT_STATUS);
> +	if (!(scsw->tm.stctl & SCSW_STCTL_STATUS_PEND))
> +		return 0;
> +	if (scsw->tm.stctl & SCSW_STCTL_INTER_STATUS)
> +		return 0;
> +	if (scsw->tm.stctl & SCSW_STCTL_ALERT_STATUS)
> +		return 1;
> +	return 0;
>  }
>  
>  /**
> @@ -689,11 +702,15 @@ static inline int scsw_tm_is_valid_ectl(union scsw *scsw)
>   */
>  static inline int scsw_tm_is_valid_pno(union scsw *scsw)
>  {
> -	return (scsw->tm.fctl != 0) &&
> -	       (scsw->tm.stctl & SCSW_STCTL_STATUS_PEND) &&
> -	       (!(scsw->tm.stctl & SCSW_STCTL_INTER_STATUS) ||
> -		 ((scsw->tm.stctl & SCSW_STCTL_INTER_STATUS) &&
> -		  (scsw->tm.actl & SCSW_ACTL_SUSPENDED)));
> +	if (!scsw->tm.fctl)
> +		return 0;
> +	if (!(scsw->tm.stctl & SCSW_STCTL_STATUS_PEND))
> +		return 0;
> +	if (!(scsw->tm.stctl & SCSW_STCTL_INTER_STATUS))
> +		return 1;
> +	if (scsw->tm.actl & SCSW_ACTL_SUSPENDED)
> +		return 1;
> +	return 0;
>  }
>  
>  /**
> -- 
> 2.7.4
>