From: Wang Hai <wanghai38@xxxxxxxxxx>
[ Upstream commit 1b80fec7b043552e01609bae7d0aad07aa742adc ]
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@xxxxxxxxxx>
Acked-by: Magnus Karlsson <magnus.karlsson@xxxxxxxxx>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@xxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210817203736.3529939-1-anthony.l.nguyen@xxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
index f72d2978263b..d60da7a89092 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;
--
2.30.2
