net: stmmac: dwmac4: Use the correct bufzise when the len is exactly 8K

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DMA bufsize selection isn't made on the MTU but the actual frame length,
so including the L2 header. On DWMAC4, if the len is exactly BUF_SIZE_8KiB,
the next larger size is incorrectly selected.

Lets fix the comparison and while at it, rename the parameter from len
to mtu.

Fixes: c3efed5ad1 ("net: stmmac: Enable dwmac4 jumbo frame more than 8KiB").
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Link: https://patch.msgid.link/20260917215339.2022523-6-maxime.chevallier@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Maxime Chevallier 2026-09-17 23:53:36 +02:00 • committed by Jakub Kicinski

parent 960db6f657

commit b42e701277

3 changed files with 5 additions and 5 deletions

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4

drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c

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2

drivers/net/ethernet/stmicro/stmmac/hwif.h

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4

drivers/net/ethernet/stmicro/stmmac/ring_mode.c

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