netdev - Re: net: thunderx: nicvf_xdp

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Message-Id: <20181121.161846.32682644237371562.davem@davemloft.net>
Date:   Wed, 21 Nov 2018 16:18:46 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     lorenzo.bianconi@...hat.com
Cc:     netdev@...r.kernel.org, sgoutham@...ium.com
Subject: Re: net: thunderx: nicvf_xdp_setup error code path

From: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
Date: Tue, 20 Nov 2018 18:56:36 +0100

> Hi all,
> 
> looking at thunderx XDP support I noticed that nic->xdp_prog pointer in
> nicvf_xdp_setup is not actually set to NULL if bpf_prog_add fails but it
> is initialized with bpf_prog_add error code. xdp_prog pointer value is used in
> the driver to verify if XDP is currently enabled.
> Moreover nicvf_xdp_setup does not report to the userspace any error code in
> case of failure.
> I wrote the following patch to fix the reported issues. Please note I just
> compiled it, not actually tested since I have no thunderx nic at the moment.
> 
> @Sunil: could you please give it a whirl? If it is ok I will post a formal
> patch, thanks

Sunil did review this, so please resubmit formally.