netdev - RE: [Intel-wired-lan] [PATCH net] ixgbe, xsk: clean up the resources in ixgbe_xsk_pool

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Date:   Tue, 17 Aug 2021 10:39:26 +0000
From:   "Penigalapati, Sandeep" <sandeep.penigalapati@...el.com>
To:     Wang Hai <wanghai38@...wei.com>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "ast@...nel.org" <ast@...nel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "hawk@...nel.org" <hawk@...nel.org>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "jeffrey.t.kirsher@...el.com" <jeffrey.t.kirsher@...el.com>,
        "Sokolowski, Jan" <jan.sokolowski@...el.com>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH net] ixgbe, xsk: clean up the resources
 in ixgbe_xsk_pool_enable error path

>-----Original Message-----
>From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
>Wang Hai
>Sent: Monday, June 7, 2021 5:57 PM
>To: Brandeburg, Jesse <jesse.brandeburg@...el.com>; Nguyen, Anthony L
><anthony.l.nguyen@...el.com>; davem@...emloft.net; ast@...nel.org;
>kuba@...nel.org; daniel@...earbox.net; hawk@...nel.org;
>john.fastabend@...il.com; jeffrey.t.kirsher@...el.com; Sokolowski, Jan
><jan.sokolowski@...el.com>; Karlsson, Magnus
><magnus.karlsson@...el.com>
>Cc: netdev@...r.kernel.org; bpf@...r.kernel.org; intel-wired-
>lan@...ts.osuosl.org; linux-kernel@...r.kernel.org
>Subject: [Intel-wired-lan] [PATCH net] ixgbe, xsk: clean up the resources in
>ixgbe_xsk_pool_enable error path
>
>In ixgbe_xsk_pool_enable(), if ixgbe_xsk_wakeup() fails, We should restore
>the previous state and clean up the resources. Add the missing clear
>af_xdp_zc_qps and unmap dma to fix this bug.
>
>Fixes: d49e286d354e ("ixgbe: add tracking of AF_XDP zero-copy state for each
>queue pair")
>Fixes: 4a9b32f30f80 ("ixgbe: fix potential RX buffer starvation for AF_XDP")
>Signed-off-by: Wang Hai <wanghai38@...wei.com>
>---
> drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@...el.com>