netdev - [PATCH net v2 1/3] iavf: fix inverted Rx hash condition leading to disabled hash

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Message-Id: <20230316155316.1554931-2-anthony.l.nguyen@intel.com>
Date:   Thu, 16 Mar 2023 08:53:14 -0700
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, netdev@...r.kernel.org
Cc:     Alexander Lobakin <aleksander.lobakin@...el.com>,
        anthony.l.nguyen@...el.com, leonro@...dia.com,
        Larysa Zaremba <larysa.zaremba@...el.com>,
        Michal Kubiak <michal.kubiak@...el.com>,
        Rafal Romanowski <rafal.romanowski@...el.com>
Subject: [PATCH net v2 1/3] iavf: fix inverted Rx hash condition leading to disabled hash

From: Alexander Lobakin <aleksander.lobakin@...el.com>

Condition, which checks whether the netdev has hashing enabled is
inverted. Basically, the tagged commit effectively disabled passing flow
hash from descriptor to skb, unless user *disables* it via Ethtool.
Commit a876c3ba59a6 ("i40e/i40evf: properly report Rx packet hash")
fixed this problem, but only for i40e.
Invert the condition now in iavf and unblock passing hash to skbs again.

Fixes: 857942fd1aa1 ("i40e: Fix Rx hash reported to the stack by our driver")
Reviewed-by: Larysa Zaremba <larysa.zaremba@...el.com>
Reviewed-by: Michal Kubiak <michal.kubiak@...el.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@...el.com>
Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>
Reviewed-by: Leon Romanovsky <leonro@...dia.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/iavf/iavf_txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.c b/drivers/net/ethernet/intel/iavf/iavf_txrx.c
index 18b6a702a1d6..e989feda133c 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_txrx.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.c
@@ -1096,7 +1096,7 @@ static inline void iavf_rx_hash(struct iavf_ring *ring,
 		cpu_to_le64((u64)IAVF_RX_DESC_FLTSTAT_RSS_HASH <<
 			    IAVF_RX_DESC_STATUS_FLTSTAT_SHIFT);
 
-	if (ring->netdev->features & NETIF_F_RXHASH)
+	if (!(ring->netdev->features & NETIF_F_RXHASH))
 		return;
 
 	if ((rx_desc->wb.qword1.status_error_len & rss_mask) == rss_mask) {
-- 
2.38.1