linux-kernel - Re: [PATCH v3] octeontx2-pf: Add error log forcn10k_map_unmap_rq

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Message-ID: <20250407164221.GT395307@horms.kernel.org>
Date: Mon, 7 Apr 2025 17:42:21 +0100
From: Simon Horman <horms@...nel.org>
To: Wentao Liang <vulab@...as.ac.cn>
Cc: sbhatta@...vell.com, sgoutham@...vell.com, gakula@...vell.com,
	hkelam@...vell.com, andrew+netdev@...n.ch, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] octeontx2-pf: Add error log
 forcn10k_map_unmap_rq_policer()

On Mon, Apr 07, 2025 at 04:11:17PM +0800, Wentao Liang wrote:
> The cn10k_free_matchall_ipolicer() calls the cn10k_map_unmap_rq_policer()
> for each queue in a for loop without checking for any errors.
> 
> Check the return value of the cn10k_map_unmap_rq_policer() function during
> each loop, and report a warning if the function fails.
> 
> Signed-off-by: Wentao Liang <vulab@...as.ac.cn>
> ---
> v3: Add failed queue number and error code to log.
> v2: Fix error code
> 
>  drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> index a15cc86635d6..9113a9b90002 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> @@ -353,8 +353,10 @@ int cn10k_free_matchall_ipolicer(struct otx2_nic *pfvf)
>  
>  	/* Remove RQ's policer mapping */
>  	for (qidx = 0; qidx < hw->rx_queues; qidx++)
> -		cn10k_map_unmap_rq_policer(pfvf, qidx,
> -					   hw->matchall_ipolicer, false);
> +		rc = cn10k_map_unmap_rq_policer(pfvf, qidx, hw->matchall_ipolicer, false);
> +		if (rc)
> +			dev_warn(pfvf->dev, "Failed to unmap RQ %d's policer (error %d).",
> +				 qidx, rc);
>  
>  	rc = cn10k_free_leaf_profile(pfvf, hw->matchall_ipolicer);

I think that you need brackets for the for loop now
that it covers more than one statement. Like this:

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
index c3b6e0f60a79..7f6a435ac680 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
@@ -357,9 +357,12 @@ int cn10k_free_matchall_ipolicer(struct otx2_nic *pfvf)
 	mutex_lock(&pfvf->mbox.lock);
 
 	/* Remove RQ's policer mapping */
-	for (qidx = 0; qidx < hw->rx_queues; qidx++)
-		cn10k_map_unmap_rq_policer(pfvf, qidx,
-					   hw->matchall_ipolicer, false);
+	for (qidx = 0; qidx < hw->rx_queues; qidx++) {
+		rc = cn10k_map_unmap_rq_policer(pfvf, qidx, hw->matchall_ipolicer, false);
+		if (rc)
+			dev_warn(pfvf->dev, "Failed to unmap RQ %d's policer (error %d).",
+				 qidx, rc);
+	}
 
 	rc = cn10k_free_leaf_profile(pfvf, hw->matchall_ipolicer);
 

Flagged by allmodconfig W=1 builds.

-- 
pw-bot: changes-requested