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net: fec: limit register access on i.MX6UL
[ Upstream commit 0a8b43b ] Using 'ethtool -d […]' on an i.MX6UL leads to a kernel crash: Unhandled fault: external abort on non-linefetch (0x1008) at […] due to this SoC has less registers in its FEC implementation compared to other i.MX6 variants. Thus, a run-time decision is required to avoid access to non-existing registers. Fixes: a51d3ab ("net: fec: use a more proper compatible string for i.MX6UL type device") Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20221024080552.21004-1-jbe@pengutronix.de Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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