linux-kernel - Re: [PATCH v8 01/10] drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs

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Date:   Wed, 23 May 2018 17:45:41 +0530
From:   Raju P L S S S N <rplsssn@...eaurora.org>
To:     Doug Anderson <dianders@...omium.org>,
        Lina Iyer <ilina@...eaurora.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        linux-arm-msm@...r.kernel.org,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        msivasub@...eaurora.org, mkshah@...eaurora.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Evan Green <evgreen@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: Re: [PATCH v8 01/10] drivers: qcom: rpmh-rsc: add RPMH controller for
 QCOM SoCs

Hi,

On 5/12/2018 1:45 AM, Doug Anderson wrote:
> Hi,
> 
> On Wed, May 9, 2018 at 10:01 AM, Lina Iyer <ilina@...eaurora.org> wrote:
>> +int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg)
>> +{
>> +       int ret;
>> +
>> +       if (!msg || !msg->cmds || !msg->num_cmds ||
>> +           msg->num_cmds > MAX_RPMH_PAYLOAD) {
>> +               WARN_ON(1);
>> +               return -EINVAL;
>> +       }
>> +
>> +       do {
>> +               ret = tcs_write(drv, msg);
>> +               if (ret == -EBUSY) {
>> +                       pr_info_ratelimited("TCS Busy, retrying RPMH message send: addr=%#x\n",
>> +                                           msg->cmds[0].addr);
>> +                       udelay(10);
>> +               }
>> +       } while (ret == -EBUSY);
>> +
>> +       return ret;
>> +}
>> +EXPORT_SYMBOL(rpmh_rsc_send_data);
> 
> Here and elsewhere in this series: why EXPORT_SYMBOL in this case?
> This is only exported to rpmh.c, right?  You don't need EXPORT_SYMBOL
> for that.  The Makefile puts rpmh.c and rpmh-rsc.c together in the
> same "qcom_rpmh.o", and then even further the KConfig lists this as
> bool so both are builtin to the kernel.
> 
> -Doug

Sure. I Will change in v9.

Thanks for your review Doug,
Raju

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