net/wan/fsl_ucc_hdlc: reject muram offsets above 64K

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[ Upstream commit 148587a59f ]

Qiang Zhao points out that these offsets get written to 16-bit
registers, and there are some QE platforms with more than 64K
muram. So it is possible that qe_muram_alloc() gives us an allocation
that can't actually be used by the hardware, so detect and reject
that.

Reported-by: Qiang Zhao <qiang.zhao@nxp.com>
Reviewed-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Rasmus Villemoes 2019-11-28 15:55:51 +01:00 • committed by Greg Kroah-Hartman

parent c0317d7419

commit 76cb528725

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drivers/net/wan/fsl_ucc_hdlc.c

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