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From: Harini Katakam <harinik@xilinx.com>
To: Claudiu Beznea <Claudiu.Beznea@microchip.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>,
	David Miller <davem@davemloft.net>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	michals@xilinx.com, appanad@xilinx.com,
	Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Subject: Re: [RFC PATCH 3/5] net: macb: Add pm runtime support
Date: Thu, 3 May 2018 16:43:50 +0530	[thread overview]
Message-ID: <CAFcVECKWz6bGZpg7UF=4hObUjca12Oq5NbE0SBL+v=1grJP8YA@mail.gmail.com> (raw)
In-Reply-To: <48b8ea24-52be-c314-f674-1a6cae4d95f4@microchip.com>

Hi Claudiu,

On Thu, May 3, 2018 at 3:39 PM, Claudiu Beznea
<Claudiu.Beznea@microchip.com> wrote:
>
>
> On 22.03.2018 15:51, harinikatakamlinux@gmail.com wrote:
>> From: Harini Katakam <harinik@xilinx.com>
<snip>
> I would use a "goto" instruction, e.g.:
>                 value = -ETIMEDOUT;
>                 goto out;
>

Will do

>
> Below, in macb_open() you have a return err; case:
>         err = macb_alloc_consistent(bp);
>         if (err) {
>                 netdev_err(dev, "Unable to allocate DMA memory (error %d)\n",
>                            err);
>                 return err;
>         }
>
> You have to undo pm_runtime_get_sync() with pm_runtime_put_sync() or something
> similar to decrement dev->power.usage_count.

Will do

<snip>
>> @@ -4104,11 +4145,16 @@ static int macb_remove(struct platform_device *pdev)
>>               mdiobus_free(bp->mii_bus);
>>
>>               unregister_netdev(dev);
>> -             clk_disable_unprepare(bp->tx_clk);
>> -             clk_disable_unprepare(bp->hclk);
>> -             clk_disable_unprepare(bp->pclk);
>> -             clk_disable_unprepare(bp->rx_clk);
>> -             clk_disable_unprepare(bp->tsu_clk);
>> +             pm_runtime_disable(&pdev->dev);
>> +             pm_runtime_dont_use_autosuspend(&pdev->dev);
>> +             if (!pm_runtime_suspended(&pdev->dev)) {
>> +                     clk_disable_unprepare(bp->tx_clk);
>> +                     clk_disable_unprepare(bp->hclk);
>> +                     clk_disable_unprepare(bp->pclk);
>> +                     clk_disable_unprepare(bp->rx_clk);
>> +                     clk_disable_unprepare(bp->tsu_clk);
>> +                     pm_runtime_set_suspended(&pdev->dev);
>
> This is driver remove function. Shouldn't clocks be removed?

clk_disable_unprepare IS being done here.
The check for !pm_runtime_suspended is just to make sure the
clocks are not already removed (in runtime_suspend).

Regards,
Harini

  reply	other threads:[~2018-05-03 11:13 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-22 13:51 [RFC PATCH 0/5] Macb power management support for ZynqMP harinikatakamlinux
2018-03-22 13:51 ` [RFC PATCH 1/5] net: macb: Check MDIO state before read/write and use timeouts harinikatakamlinux
2018-03-22 14:47   ` Andrew Lunn
2018-05-03 10:08   ` Claudiu Beznea
2018-05-03 10:58     ` Harini Katakam
2018-03-22 13:51 ` [RFC PATCH 2/5] net: macb: Support clock management for tsu_clk harinikatakamlinux
2018-03-22 13:51 ` [RFC PATCH 3/5] net: macb: Add pm runtime support harinikatakamlinux
2018-05-03 10:09   ` Claudiu Beznea
2018-05-03 11:13     ` Harini Katakam [this message]
2018-05-03 12:59       ` Claudiu Beznea
2018-03-22 13:51 ` [RFC PATCH 4/5] net: macb: Add support for suspend/resume with full power down harinikatakamlinux
2018-05-03 10:09   ` Claudiu Beznea
2018-05-03 11:20     ` Harini Katakam
2018-05-03 12:23       ` Claudiu Beznea
2018-03-22 13:51 ` [RFC PATCH 5/5] net: macb: Add WOL support with ARP harinikatakamlinux
2018-05-04 12:17   ` Claudiu Beznea
2018-05-10 10:37     ` Harini Katakam
2018-05-15  8:39       ` Claudiu Beznea

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