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Callers are expected to check cpu_cache_has_invalidate_memregion() and return -ENXIO themselves, instead of calling this function. If a caller forgets to do this, they may erroneously think the operation succeeded. This is in contrast to x86, where cpu_cache_invalidate_memregion() itself checks if the operation is supported, and returns -ENXIO if it is not. Signed-off-by: Bence Csokas Reviewed-by: Jonathan Cameron --- lib/cache_maint.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/cache_maint.c b/lib/cache_maint.c index 9256a9ffc34c..132d2816d6b1 100644 --- a/lib/cache_maint.c +++ b/lib/cache_maint.c @@ -59,12 +59,12 @@ static int cache_inval_done_one(struct cache_coherency_= ops_inst *cci) =20 static int cache_invalidate_memregion(phys_addr_t addr, size_t size) { - int ret; struct cache_coherency_ops_inst *cci; struct cc_inval_params params =3D { .addr =3D addr, .size =3D size, }; + int ret =3D -ENXIO; =20 guard(rwsem_read)(&cache_ops_instance_list_lock); list_for_each_entry(cci, &cache_ops_instance_list, node) { @@ -78,7 +78,7 @@ static int cache_invalidate_memregion(phys_addr_t addr, s= ize_t size) return ret; } =20 - return 0; + return ret; } =20 struct cache_coherency_ops_inst * --=20 2.55.0