linux-kernel - Re: [PATCH RFC 4/7] bridge: cfm: Kernel space implementation of CFM.

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Message-ID: <20200904080257.6b2a643f@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 4 Sep 2020 08:02:57 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Henrik Bjoernlund <henrik.bjoernlund@...rochip.com>
Cc:     <davem@...emloft.net>, <roopa@...dia.com>, <nikolay@...dia.com>,
        <jiri@...lanox.com>, <idosch@...lanox.com>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bridge@...ts.linux-foundation.org>,
        <UNGLinuxDriver@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: Re: [PATCH RFC 4/7] bridge: cfm: Kernel space implementation of
 CFM.

On Fri, 4 Sep 2020 09:15:24 +0000 Henrik Bjoernlund wrote:
> +	rcu_read_lock();
> +	b_port = rcu_dereference(mep->b_port);
> +	if (!b_port)
> +		return NULL;
> +	skb = dev_alloc_skb(CFM_CCM_MAX_FRAME_LENGTH);
> +	if (!skb)
> +		return NULL;

net/bridge/br_cfm.c:171:23: warning: context imbalance in 'ccm_frame_build' - different lock contexts for basic block