linux-kernel - Re: [PATCH v2 04/15] ARM: milbeaut: Add basic support for Milbeaut m10v SoC

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Date:   Tue, 19 Feb 2019 16:12:11 +0900
From:   "Sugaya, Taichi" <sugaya.taichi@...ionext.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Shinji Kanematsu <kanematsu.shinji@...ionext.com>,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Takao Orito <orito.takao@...ionext.com>,
        Kazuhiro Kasai <kasai.kazuhiro@...ionext.com>
Subject: Re: [PATCH v2 04/15] ARM: milbeaut: Add basic support for Milbeaut
 m10v SoC

Hi,

Thank you for your comments.

On 2019/02/18 21:15, Arnd Bergmann wrote:
> On Fri, Feb 8, 2019 at 1:26 PM Sugaya Taichi
> <sugaya.taichi@...ionext.com> wrote:
> 
>> +static int m10v_pm_enter(suspend_state_t state)
>> +{
>> +       switch (state) {
>> +       case PM_SUSPEND_STANDBY:
>> +               pr_err("STANDBY\n");
>> +               asm("wfi");
>> +               break;
>> +       case PM_SUSPEND_MEM:
>> +               pr_err("SUSPEND\n");
>> +               cpu_pm_enter();
>> +               cpu_suspend(0, m10v_die);
>> +               cpu_pm_exit();
>> +               break;
>> +       }
>> +       return 0;
>> +}
> 
> It looks like you left the pr_err() messages from bringup, they should probably
> be removed now.
> 

OK. remove the pr_err()s.


>> +static int __init m10v_pm_init(void)
>> +{
>> +       suspend_set_ops(&m10v_pm_ops);
>> +
>> +       return 0;
>> +}
>> +late_initcall(m10v_pm_init);
> 
> This requires a check to ensure you are actually on the right platform,
> otherwise you break suspend/resume in a multiplatform kernel running
> on anything other than milbeaut.
>

OK.
I think the solution is adding a "if statement with mlbeaut compatible" 
above suspend_set_ops(&m10v_pm_ops).

Thanks,
Sugaya Taichi


>         Arnd
>