linux-kernel - Re: [PATCH linux-next] drivers/xen/events/events

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Date:   Wed, 25 Aug 2021 14:53:26 +0200
From:   Juergen Gross <jgross@...e.com>
To:     CGEL <cgel.zte@...il.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wei Liu <wei.liu@...nel.org>, Jan Beulich <jbeulich@...e.com>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        Jing Yangyang <jing.yangyang@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH linux-next] drivers/xen/events/events_base.c: fix
 bugon.cocci warnings

On 25.08.21 08:22, CGEL wrote:
> From: Jing Yangyang <jing.yangyang@....com.cn>
> 
> Use BUG_ON instead of a if condition followed by BUG.
> 
> Generated by: scripts/coccinelle/misc/bugon.cocci
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Jing Yangyang <jing.yangyang@....com.cn>

I already gave you feedback for another patch asking you to adjust
the continuation line indentations.

Same here.


Juergen

> ---
>   drivers/xen/events/events_base.c | 21 ++++++++-------------
>   1 file changed, 8 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
> index a78704a..dd44019 100644
> --- a/drivers/xen/events/events_base.c
> +++ b/drivers/xen/events/events_base.c
> @@ -818,8 +818,7 @@ static void xen_evtchn_close(evtchn_port_t port)
>   	struct evtchn_close close;
>   
>   	close.port = port;
> -	if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
> -		BUG();
> +	BUG_ON(HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0);
>   }
>   
>   /* Not called for lateeoi events. */
> @@ -1270,9 +1269,8 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
>   					      handle_percpu_irq, "ipi");
>   
>   		bind_ipi.vcpu = xen_vcpu_nr(cpu);
> -		if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
> -						&bind_ipi) != 0)
> -			BUG();
> +		BUG_ON(HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
> +						&bind_ipi) != 0);
>   		evtchn = bind_ipi.port;
>   
>   		ret = xen_irq_info_ipi_setup(cpu, irq, evtchn, ipi);
> @@ -1983,9 +1981,8 @@ static void restore_cpu_virqs(unsigned int cpu)
>   		/* Get a new binding from Xen. */
>   		bind_virq.virq = virq;
>   		bind_virq.vcpu = xen_vcpu_nr(cpu);
> -		if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
> -						&bind_virq) != 0)
> -			BUG();
> +		BUG_ON(HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
> +						&bind_virq) != 0);
>   		evtchn = bind_virq.port;
>   
>   		/* Record the new mapping. */
> @@ -2009,9 +2006,8 @@ static void restore_cpu_ipis(unsigned int cpu)
>   
>   		/* Get a new binding from Xen. */
>   		bind_ipi.vcpu = xen_vcpu_nr(cpu);
> -		if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
> -						&bind_ipi) != 0)
> -			BUG();
> +		BUG_ON(HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
> +						&bind_ipi) != 0);
>   		evtchn = bind_ipi.port;
>   
>   		/* Record the new mapping. */
> @@ -2063,8 +2059,7 @@ void xen_poll_irq_timeout(int irq, u64 timeout)
>   		poll.timeout = timeout;
>   		set_xen_guest_handle(poll.ports, &evtchn);
>   
> -		if (HYPERVISOR_sched_op(SCHEDOP_poll, &poll) != 0)
> -			BUG();
> +		BUG_ON(HYPERVISOR_sched_op(SCHEDOP_poll, &poll) != 0);
>   	}
>   }
>   EXPORT_SYMBOL(xen_poll_irq_timeout);
> 


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