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Instead of returning an error if the watermark value is too high, which the core will silently ignore anyway, limit the value to the hardware FIFO size; a lower-than-requested value is still better than using the default, which is usually 1. Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> Signed-off-by: Paul Cercueil <paul@crapouillou.net> Acked-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://lore.kernel.org/r/20220117102512.31725-1-paul@crapouillou.net Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>