linux-kernel - Re: [net PATCH] octeontx2-pf: Fix memory leak during interface down

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Message-ID: <20231116205033.GI109951@vergenet.net>
Date:   Thu, 16 Nov 2023 20:50:33 +0000
From:   Simon Horman <horms@...nel.org>
To:     Suman Ghosh <sumang@...vell.com>
Cc:     sgoutham@...vell.com, gakula@...vell.com, sbhatta@...vell.com,
        hkelam@...vell.com, lcherian@...vell.com, jerinj@...vell.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [net PATCH] octeontx2-pf: Fix memory leak during interface down

On Thu, Nov 16, 2023 at 09:23:34PM +0530, Suman Ghosh wrote:
> During 'ifconfig <netdev> down' one RSS memory was not getting freed.
> This patch fixes the same.
> 
> Fixes: f12098ce9b43 ("octeontx2-pf: Clear RSS enable flag on interace down")
> Signed-off-by: Suman Ghosh <sumang@...vell.com>

Hi Suman,

I'm wondering if the fixes tag should refer to the commit
that introduced the allocation that your patch is freeing.

Fixes: 81a4362016e7 ("octeontx2-pf: Add RSS multi group support")

> ---
>  drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> index 91b99fd70361..ba95ac913274 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> @@ -1934,6 +1934,8 @@ int otx2_stop(struct net_device *netdev)
>  	/* Clear RSS enable flag */
>  	rss = &pf->hw.rss_info;
>  	rss->enable = false;
> +	if (!netif_is_rxfh_configured(netdev))
> +		kfree(rss->rss_ctx[DEFAULT_RSS_CONTEXT_GROUP]);
>  
>  	/* Cleanup Queue IRQ */
>  	vec = pci_irq_vector(pf->pdev,
> -- 
> 2.25.1
>