linux-kernel - Re: [PATCH 2/3] xen/privcmd: fix error handling in mmap-resource processing

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Message-ID: <c0c84258-c2ee-f58c-ae9a-5f8bdd75f0db@oracle.com>
Date:   Wed, 22 Sep 2021 09:29:17 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Jan Beulich <jbeulich@...e.com>, Juergen Gross <jgross@...e.com>
Cc:     Stefano Stabellini <sstabellini@...nel.org>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] xen/privcmd: fix error handling in mmap-resource
 processing


On 9/22/21 6:17 AM, Jan Beulich wrote:
> @@ -817,7 +818,7 @@ static long privcmd_ioctl_mmap_resource(
>  			unsigned int i;
>  
>  			for (i = 0; i < num; i++) {
> -				rc = pfns[i];
> +				rc = errs[i];
>  				if (rc < 0)
>  					break;


Can the assignment be moved inside the 'if' statement?


I am also not sure I understand why we need error array at all. Don't we always look at the first error only? In fact, AFAICS this is the only place where we look at the value.


-boris