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[net] ixgbe, xsk: clean up the resources in ixgbe_xsk_pool_enable error path

Message ID 20210607122644.59021-1-wanghai38@huawei.com
State Under Review
Delegated to: Anthony Nguyen
Headers show
Series [net] ixgbe, xsk: clean up the resources in ixgbe_xsk_pool_enable error path | expand

Commit Message

Wang Hai June 7, 2021, 12:26 p.m. UTC
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@huawei.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Magnus Karlsson June 8, 2021, 11:07 a.m. UTC | #1
On Mon, Jun 7, 2021 at 2:17 PM Wang Hai <wanghai38@huawei.com> wrote:
>
> 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@huawei.com>
> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Thanks Wang.

Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>

> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
> index 91ad5b902673..d912f14d2ba4 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
> @@ -52,8 +52,11 @@ static int ixgbe_xsk_pool_enable(struct ixgbe_adapter *adapter,
>
>                 /* Kick start the NAPI context so that receiving will start */
>                 err = ixgbe_xsk_wakeup(adapter->netdev, qid, XDP_WAKEUP_RX);
> -               if (err)
> +               if (err) {
> +                       clear_bit(qid, adapter->af_xdp_zc_qps);
> +                       xsk_pool_dma_unmap(pool, IXGBE_RX_DMA_ATTR);
>                         return err;
> +               }
>         }
>
>         return 0;
> --
> 2.17.1
>
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@osuosl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
index 91ad5b902673..d912f14d2ba4 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -52,8 +52,11 @@  static int ixgbe_xsk_pool_enable(struct ixgbe_adapter *adapter,
 
 		/* Kick start the NAPI context so that receiving will start */
 		err = ixgbe_xsk_wakeup(adapter->netdev, qid, XDP_WAKEUP_RX);
-		if (err)
+		if (err) {
+			clear_bit(qid, adapter->af_xdp_zc_qps);
+			xsk_pool_dma_unmap(pool, IXGBE_RX_DMA_ATTR);
 			return err;
+		}
 	}
 
 	return 0;