[PATCH v6 1/2] spi: Replace -ENOTSUPP with -EOPNOTSUPP in op checking

[Mark Brown]

On Thu, Nov 16, 2023 at 10:43:37AM +0800, AceLan Kao wrote:

> The purpose of this patch is to distinguish the "operation not support"
> error from the generic "not support", so that drivers could better
> handle different errors.

What is the intended distinction between the two?
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