net: stmmac: Limit FIFO size by hardware capability

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[ Upstream commit 044f2fbaa2 ]

Tx/Rx FIFO size is specified by the parameter "{tx,rx}-fifo-depth" from
stmmac_platform layer.

However, these values are constrained by upper limits determined by the
capabilities of each hardware feature. There is a risk that the upper
bits will be truncated due to the calculation, so it's appropriate to
limit them to the upper limit values and display a warning message.

This only works if the hardware capability has the upper limit values.

Fixes: e7877f52fd ("stmmac: Read tx-fifo-depth and rx-fifo-depth from the devicetree")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Kunihiko Hayashi 2025-01-27 10:38:19 +09:00 • committed by Greg Kroah-Hartman

parent 80083bd4c2

commit 6d3693d402

1 changed files with 15 additions and 0 deletions

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

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