From: Jan Beulich <jbeulich@suse.com>
To: Juergen Gross <jgross@suse.com>
Cc: Wei Liu <wei.liu@kernel.org>, Paul Durrant <paul@xen.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org,
Ross Lagerwall <ross.lagerwall@citrix.com>
Subject: Re: [PATCH] xen/netback: fix build warning
Date: Wed, 7 Dec 2022 10:25:26 +0100 [thread overview]
Message-ID: <46128e5c-f616-38c5-0ab2-1825e72985a8@suse.com> (raw)
In-Reply-To: <20221207072349.28608-1-jgross@suse.com>
On 07.12.2022 08:23, Juergen Gross wrote:
> Commit ad7f402ae4f4 ("xen/netback: Ensure protocol headers don't fall in
> the non-linear area") introduced a (valid) build warning.
>
> Fix it.
>
> Fixes: ad7f402ae4f4 ("xen/netback: Ensure protocol headers don't fall in the non-linear area")
> Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
> --- a/drivers/net/xen-netback/netback.c
> +++ b/drivers/net/xen-netback/netback.c
> @@ -530,7 +530,7 @@ static int xenvif_tx_check_gop(struct xenvif_queue *queue,
> const bool sharedslot = nr_frags &&
> frag_get_pending_idx(&shinfo->frags[0]) ==
> copy_pending_idx(skb, copy_count(skb) - 1);
> - int i, err;
> + int i, err = 0;
>
> for (i = 0; i < copy_count(skb); i++) {
> int newerr;
I'm afraid other logic (below here) is now slightly wrong as well, in
particular
/* If the mapping of the first frag was OK, but
* the header's copy failed, and they are
* sharing a slot, send an error
*/
if (i == 0 && !first_shinfo && sharedslot)
xenvif_idx_release(queue, pending_idx,
XEN_NETIF_RSP_ERROR);
else
xenvif_idx_release(queue, pending_idx,
XEN_NETIF_RSP_OKAY);
which looks to be intended to deal with _only_ failure of the one shared
part of the header, whereas "err" now can indicate an error on any earlier
part as well.
Jan
next prev parent reply other threads:[~2022-12-07 9:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-07 7:23 [PATCH] xen/netback: fix build warning Juergen Gross
2022-12-07 9:25 ` Jan Beulich [this message]
2022-12-07 10:18 ` Juergen Gross
2022-12-07 10:26 ` Jan Beulich
2022-12-07 11:29 ` Juergen Gross
2022-12-07 12:24 ` Ross Lagerwall
2022-12-07 13:46 ` Jason Andryuk
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