linux-kernel - Re: [PATCH] kvm:s390:Fix assumption that kvm_set_irq

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Date:	Fri, 7 Aug 2015 09:18:15 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Nicholas Krause <xerofoify@...il.com>, gleb@...nel.org
Cc:	borntraeger@...ibm.com, cornelia.huck@...ibm.com,
	linux390@...ibm.com, kvm@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kvm:s390:Fix assumption that kvm_set_irq_routing is
 always run successfully



On 06/08/2015 19:05, Nicholas Krause wrote:
> This fixes the assumption that kvm_set_irq_routing is always run
> successfully by instead making it equal to the variable r which
> we use for returning in the function kvm_arch_vm_ioctl instead
> of making r equal to zero when calling this particular function
> and incorrectly making the caller of kvm_arch_vm_ioctl think
> the function has run successfully.
> 
> Signed-off-by: Nicholas Krause <xerofoify@...il.com>
> ---
>  arch/s390/kvm/kvm-s390.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index f32f843..660860f 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -879,8 +879,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
>  		if (kvm->arch.use_irqchip) {
>  			/* Set up dummy routing. */
>  			memset(&routing, 0, sizeof(routing));
> -			kvm_set_irq_routing(kvm, &routing, 0, 0);
> -			r = 0;
> +			r = kvm_set_irq_routing(kvm, &routing, 0, 0);
>  		}
>  		break;
>  	}
> 

Seems good.

Paolo
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