Re: [PATCH v9 04/10] drivers: qcom: rpmh: add RPMH helper functions

[Doug Anderson]

Hi,

On Thu, May 24, 2018 at 3:45 AM, Raju P L S S S N
<rplsssn@xxxxxxxxxxxxxx> wrote:
> --- a/drivers/soc/qcom/rpmh-rsc.c
> +++ b/drivers/soc/qcom/rpmh-rsc.c
> @@ -61,6 +61,8 @@
>  #define CMD_STATUS_ISSUED              BIT(8)
>  #define CMD_STATUS_COMPL               BIT(16)
>
> +LIST_HEAD(rsc_drv_list);

I still see no point of rsc_drv_list.  Please remove it, AKA squash in
<http://crosreview.com/1042883>.

I'm also still of the opinion that we should take something like
<http://crosreview.com/1054646>, AKA "Get rid of the global array
rpmh_rsc".


> +/**
> + * __rpmh_write: send the RPMH request
> + *
> + * @dev: The device making the request
> + * @state: Active/Sleep request type
> + * @rpm_msg: The data that needs to be sent (cmds).
> + */
> +static int __rpmh_write(const struct device *dev, enum rpmh_state state,
> +                       struct rpmh_request *rpm_msg)
> +{
> +       struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);
> +
> +       if (IS_ERR(ctrlr))
> +               return PTR_ERR(ctrlr);
> +
> +       rpm_msg->msg.state = state;
> +
> +       if (state != RPMH_ACTIVE_ONLY_STATE)
> +               return -EINVAL;
> +
> +       WARN_ON(irqs_disabled());
> +
> +       return rpmh_rsc_send_data(ctrlr->drv, &rpm_msg->msg);
> +}

You went too far in the removal of EXPORT_SYMBOL I think.  This symbol
needs to be exported because other code that could be compiled as a
module might need to call into it.  To explain:

* If two files that are always built-in to Linux need to call into
each other: no need for EXPORT_SYMBOL.

* If two files that are always part of the same module need to call
into each other: no need for EXPORT_SYMBOL.

* If one file that might be built-into a module needs to call another
that's builtin to the kernel: need EXPORT_SYMBOL.


-Doug