[PATCH] nvme: Elaborate on cache maintenance operation in get/set_features

[Bin Meng]

On Tue, Mar 2, 2021 at 11:43 PM Andre Przywara <andre.przywara at arm.com> wrote:
>
> At the moment the nvme_get_features() and nvme_set_features() functions
> carry a (somewhat misleading) comment about missing cache maintenance.
>
> As it turns out, nvme_get_features() has no caller at all in the tree,
> and nvme_set_features' only user doesn't use a DMA buffer.
>
> Mention that in the comment, and leave some breadcrumbs for the future,
> should those functions attract more users.
>
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
> ---
> Hi,
>
> just extending the comments as this caused some confusion lately, and to
> keep the pointer to the NVMe spec I checked.
>
> Cheers,
> Andre
>
>  drivers/nvme/nvme.c | 25 ++++++++++++++++++++-----
>  1 file changed, 20 insertions(+), 5 deletions(-)
>

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>