linux-kernel - Re: [net PATCH 1/5] octeontx2: Detect the mbox up or down message via register

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Message-ID: <20240311155818.03e20c05@kernel.org>
Date: Mon, 11 Mar 2024 15:58:18 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Subbaraya Sundeep <sbhatta@...vell.com>
Cc: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
 <sgoutham@...vell.com>, <lcherian@...vell.com>, <gakula@...vell.com>,
 <hkelam@...vell.com>, <naveenm@...vell.com>, <horms@...nel.org>
Subject: Re: [net PATCH 1/5] octeontx2: Detect the mbox up or down message
 via register

On Tue, 12 Mar 2024 00:46:48 +0530 Subbaraya Sundeep wrote:
>  static int mcs_notify_pfvf(struct mcs_intr_event *event, struct rvu *rvu)
>  {
>  	struct mcs_intr_info *req;
> -	int err, pf;
> +	int pf;
>  
>  	pf = rvu_get_pf(event->pcifunc);
>  
> +	mutex_lock(&rvu->mbox_lock);
> +
>  	req = otx2_mbox_alloc_msg_mcs_intr_notify(rvu, pf);
>  	if (!req)
>  		return -ENOMEM;

missing unlock here?

> @@ -135,10 +137,11 @@ static int mcs_notify_pfvf(struct mcs_intr_event *event, struct rvu *rvu)
>  	req->hdr.pcifunc = event->pcifunc;
>  	req->lmac_id = event->lmac_id;
>  
> -	otx2_mbox_msg_send(&rvu->afpf_wq_info.mbox_up, pf);
> -	err = otx2_mbox_wait_for_rsp(&rvu->afpf_wq_info.mbox_up, pf);
> -	if (err)
> -		dev_warn(rvu->dev, "MCS notification to pf %d failed\n", pf);
> +	otx2_mbox_wait_for_zero(&rvu->afpf_wq_info.mbox_up, pf);
> +
> +	otx2_mbox_msg_send_up(&rvu->afpf_wq_info.mbox_up, pf);
> +
> +	mutex_unlock(&rvu->mbox_lock);
-- 
pw-bot: cr