netdev - RE: [PATCH net] net: libwx: fix memory leak on msix entry

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Message-ID: <021601da2273$0b2fb3f0$218f1bd0$@trustnetic.com>
Date: Wed, 29 Nov 2023 11:20:46 +0800
From: Jiawen Wu <jiawenwu@...stnetic.com>
To: <netdev@...r.kernel.org>,
	<edumazet@...gle.com>,
	<davem@...emloft.net>,
	<kuba@...nel.org>,
	<pabeni@...hat.com>
Cc: <mengyuanlou@...-swift.com>,
	<stable@...r.kernel.org>
Subject: RE: [PATCH net] net: libwx: fix memory leak on msix entry

Cc: stable@...r.kernel.org

> -----Original Message-----
> From: Jiawen Wu <jiawenwu@...stnetic.com>
> Sent: Tuesday, November 28, 2023 5:59 PM
> To: netdev@...r.kernel.org; edumazet@...gle.com; davem@...emloft.net; kuba@...nel.org; pabeni@...hat.com
> Cc: mengyuanlou@...-swift.com; Jiawen Wu <jiawenwu@...stnetic.com>
> Subject: [PATCH net] net: libwx: fix memory leak on msix entry
> 
> Since pci_free_irq_vectors() set pdev->msix_enabled as 0 in the
> calling of pci_msix_shutdown(), wx->msix_entries is never freed.
> Reordering the lines to fix the memory leak.
> 
> Fixes: 3f703186113f ("net: libwx: Add irq flow functions")
> Signed-off-by: Jiawen Wu <jiawenwu@...stnetic.com>
> ---
>  drivers/net/ethernet/wangxun/libwx/wx_lib.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> index 2823861e5a92..a5a50b5a8816 100644
> --- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> @@ -1972,11 +1972,11 @@ void wx_reset_interrupt_capability(struct wx *wx)
>  	if (!pdev->msi_enabled && !pdev->msix_enabled)
>  		return;
> 
> -	pci_free_irq_vectors(wx->pdev);
>  	if (pdev->msix_enabled) {
>  		kfree(wx->msix_entries);
>  		wx->msix_entries = NULL;
>  	}
> +	pci_free_irq_vectors(wx->pdev);
>  }
>  EXPORT_SYMBOL(wx_reset_interrupt_capability);
> 
> --
> 2.27.0
>