linux-kernel - Re: [PATCH net-next] net: ethernet: ti: am65-cpsw: Fix PM runtime leakage in am65_cpsw_nuss_ndo_slave

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Date:   Fri, 9 Dec 2022 16:54:44 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     Roger Quadros <rogerq@...nel.org>
Cc:     davem@...emloft.net, maciej.fijalkowski@...el.com, kuba@...nel.org,
        andrew@...n.ch, edumazet@...gle.com, pabeni@...hat.com,
        vigneshr@...com, s-vadapalli@...com, linux-omap@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: ethernet: ti: am65-cpsw: Fix PM runtime
 leakage in am65_cpsw_nuss_ndo_slave_open()

On 08 Dec 12:55, Roger Quadros wrote:
>Ensure pm_runtime_put() is issued in error path.
>
>Reported-by: Jakub Kicinski <kuba@...nel.org>
>Signed-off-by: Roger Quadros <rogerq@...nel.org>


Reviewed-by: Saeed Mahameed <saeed@...nel.org>


[...]

>@@ -622,6 +623,10 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
> error_cleanup:
> 	am65_cpsw_nuss_ndo_slave_stop(ndev);

BTW, while looking at the ndo_slave_stop() call, it seems to abort if 
am65_cpsw_nuss_common_stop() fails, but looking deeper at that and it seems 
am65_cpsw_nuss_common_stop() can never fail, so you might want to fix that.

> 	return ret;
>+
>+runtime_put:
>+	pm_runtime_put(common->dev);
>+	return ret;
> }
>
> static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma)
>-- 
>2.34.1
>