net: stmmac: dwmac4: extend timeout for VLAN Tag register busy bit check

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Increase the timeout for checking the busy bit of the VLAN Tag register
from 10µs to 500ms. This change is necessary to accommodate scenarios
where Energy Efficient Ethernet (EEE) is enabled.

Overnight testing revealed that when EEE is active, the busy bit can
remain set for up to approximately 300ms. The new 500ms timeout provides
a safety margin.

Fixes: ed64639bc1 ("net: stmmac: Add support for VLAN Rx filtering")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
Link: https://patch.msgid.link/20240924205424.573913-1-shenwei.wang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Shenwei Wang 2024-09-24 15:54:24 -05:00 • committed by Paolo Abeni

parent 23e19f2473

commit 4c1b56671b

1 changed files with 9 additions and 9 deletions

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18

drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c

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