Re: [PATCH 3/4] KVM-S390: Less function calls in kvm_s390_import_bp_data() after error detection

[Cornelia Huck <cornelia.huck@de.ibm.com>]

On Wed, 17 Aug 2016 20:10:37 +0200
SF Markus Elfring <elfring@users.sourceforge.net> wrote:

> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Wed, 17 Aug 2016 19:25:50 +0200
> 
> The kfree() function was called in a few cases by the
> kvm_s390_import_bp_data() function during error handling
> even if a passed variable contained a null pointer.
> 
> Adjust jump targets according to the Linux coding style convention.

NACK.

> 
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>  arch/s390/kvm/guestdbg.c | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 

> @@ -273,10 +273,12 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
>  	vcpu->arch.guestdbg.nr_hw_wp = nr_wp;
>  	vcpu->arch.guestdbg.hw_wp_info = wp_info;
>  	return 0;
> -error:
> -	kfree(bp_data);
> -	kfree(wp_info);
> +free_bp_info:
>  	kfree(bp_info);
> +free_wp_info:
> +	kfree(wp_info);
> +free_bp_data:
> +	kfree(bp_data);
>  	return ret;
>  }
> 

This replaces a perfectly fine fallthrough with some horrible labels.
Please don't do that.