linux-kernel - RE: [Intel-wired-lan] [PATCH net v2] i40e: Fix adding unsupported cloud filters

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Date:   Thu, 16 Nov 2023 13:41:56 +0000
From:   "Romanowski, Rafal" <rafal.romanowski@...el.com>
To:     ivecera <ivecera@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "Drewek, Wojciech" <wojciech.drewek@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        Simon Horman <horms@...nel.org>,
        "Keller, Jacob E" <jacob.e.keller@...el.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: RE: [Intel-wired-lan] [PATCH net v2] i40e: Fix adding unsupported
 cloud filters

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Ivan Vecera
> Sent: Sunday, November 5, 2023 5:46 PM
> To: netdev@...r.kernel.org
> Cc: Drewek, Wojciech <wojciech.drewek@...el.com>; intel-wired-
> lan@...ts.osuosl.org; Brandeburg, Jesse <jesse.brandeburg@...el.com>; linux-
> kernel@...r.kernel.org; Eric Dumazet <edumazet@...gle.com>; Nguyen,
> Anthony L <anthony.l.nguyen@...el.com>; Simon Horman
> <horms@...nel.org>; Keller, Jacob E <jacob.e.keller@...el.com>; Jakub Kicinski
> <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; David S. Miller
> <davem@...emloft.net>
> Subject: [Intel-wired-lan] [PATCH net v2] i40e: Fix adding unsupported cloud
> filters
> 
> If a VF tries to add unsupported cloud filter through virchnl then
> i40e_add_del_cloud_filter(_big_buf) returns -ENOTSUPP but this error code is
> stored in 'ret' instead of 'aq_ret' that is used as error code sent back to VF. In
> this scenario where one of the mentioned functions fails the value of 'aq_ret'
> is zero so the VF will incorrectly receive a 'success'.
> 
> Use 'aq_ret' to store return value and remove 'ret' local variable. Additionally
> fix the issue when filter allocation fails, in this case no notification is sent back
> to the VF.
> 
> Fixes: e284fc280473be ("i40e: Add and delete cloud filter")
> Reviewed-by: Simon Horman <horms@...nel.org>
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> ---
>  .../net/ethernet/intel/i40e/i40e_virtchnl_pf.c   | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> index 08d7edccfb8ddb..3f99eb19824527 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> @@ -3844,7 +3844,7 @@ static int i40e_vc_add_cloud_filter(struct i40e_vf


Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>