soc: fsl: qe: fold qe_get_num_of_snums into qe_snums_init

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The comment "No QE ever has fewer than 28 SNUMs" is false; e.g. the
MPC8309 has 14. The code path returning -EINVAL is also a recipe for
instant disaster, since the caller (qe_snums_init) uncritically
assigns the return value to the unsigned qe_num_of_snum, and would
thus proceed to attempt to copy 4GB from snum_init_46[] to the snum[]
array.

So fold the handling of the legacy fsl,qe-num-snums into
qe_snums_init, and make sure we do not end up using the snum_init_46
array in cases other than the two where we know it makes sense.

Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Qiang Zhao <qiang.zhao@nxp.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

...

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Rasmus Villemoes 2019-05-13 11:15:01 +00:00 • committed by Li Yang

parent 5cfca8911d

commit 21560067fb

1 changed files with 16 additions and 30 deletions

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46

drivers/soc/fsl/qe/qe.c

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