i40e: use xdp.frame_sz as XDP RxQ info frag_size

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[ Upstream commit c69d22c6c4 ]

The only user of frag_size field in XDP RxQ info is
bpf_xdp_frags_increase_tail(). It clearly expects whole buffer size instead
of DMA write size. Different assumptions in i40e driver configuration lead
to negative tailroom.

Set frag_size to the same value as frame_sz in shared pages mode, use new
helper to set frag_size when AF_XDP ZC is active.

Fixes: a045d2f2d0 ("i40e: set xdp_rxq_info::frag_size")
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Link: https://patch.msgid.link/20260305111253.2317394-7-larysa.zaremba@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Larysa Zaremba 2026-03-05 12:12:47 +01:00 • committed by Sasha Levin

parent b6176646c3

commit f1ac9d1972

1 changed files with 6 additions and 3 deletions

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drivers/net/ethernet/intel/i40e/i40e_main.c

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