igb: Always call igb_xdp_ring_update_tail() under Tx lock

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[ Upstream commit 27717f8b17 ]

Always call igb_xdp_ring_update_tail() under __netif_tx_lock, add a comment
and lockdep assert to indicate that. This is needed to share the same TX
ring between XDP, XSK and slow paths. Furthermore, the current XDP
implementation is racy on tail updates.

Fixes: 9cbc948b5a ("igb: add XDP support")
Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
[Kurt: Add lockdep assert and fixes tag]
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Sriram Yagnaraman 2024-08-22 09:42:07 +02:00 • committed by Greg Kroah-Hartman

parent 25cf67f8ff

commit 61964f3634

1 changed files with 13 additions and 4 deletions

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drivers/net/ethernet/intel/igb/igb_main.c

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