net: macb: refuse set_ringparam on EMAC

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EMAC has never supported changing ring sizes: RX is hardcoded to 9 and
TX is the tiniest ring buffer you can imagine.

Make sure the operation fails early rather than silently succeed and
storing values in bp->configured_{rx,tx}_ring_size that are never read
in the EMAC case.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://patch.msgid.link/20260812-macb-context-v9-7-7ddbf5f715e0@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Théo Lebrun 2026-08-12 10:03:21 +02:00 • committed by Jakub Kicinski

parent 5262eab946

commit 227fdb2fe6

1 changed files with 3 additions and 0 deletions

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drivers/net/ethernet/cadence/macb_main.c

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