linux-kernel - Re: [PATCH] afs: remove redundant assignment to variable ret

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Message-ID: <26748.1557644126@warthog.procyon.org.uk>
Date:   Sun, 12 May 2019 07:55:26 +0100
From:   David Howells <dhowells@...hat.com>
To:     Colin King <colin.king@...onical.com>
Cc:     dhowells@...hat.com, linux-afs@...ts.infradead.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] afs: remove redundant assignment to variable ret

Colin King <colin.king@...onical.com> wrote:

> The variable ret is being assigned a value however this is never
> read and later it is being reassigned to a new value. The assignment
> is redundant and hence can be removed.

No.

>  	if (ret == 0) {
>  		ret = acl->size;
>  		if (size > 0) {
> -			ret = -ERANGE;
>  			if (acl->size > size)
>  				return -ERANGE;
>  			memcpy(buffer, acl->data, acl->size);

This is the wrong solution.  acl and key need releasing, so the return should
be a goto.

David