linux-kernel - Re: [PATCH] brcmfmac: avoid duplicated suspend/resume operation

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Message-ID: <54AA6BEB.9060207@broadcom.com>
Date:	Mon, 5 Jan 2015 11:48:11 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
CC:	<brudley@...adcom.com>, Franky Lin <frankyl@...adcom.com>,
	<meuleman@...adcom.com>, <kvalo@...eaurora.org>,
	<linville@...driver.com>, <pieterpg@...adcom.com>,
	<hdegoede@...hat.com>, <wens@...e.org>,
	<linux-wireless@...r.kernel.org>,
	<brcm80211-dev-list@...adcom.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] brcmfmac: avoid duplicated suspend/resume operation

On 01/05/15 03:34, Fu, Zhonghui wrote:
> Hi Arend,
>
> Where to find your patch for this?

Well, we did not submit it. Hence my "Acked-by:" to your patch below.

Regards,
Arend

>
> Thanks,
> Zhonghui
>
> On 2014/12/31 17:56, Arend van Spriel wrote:
>> On 12/31/14 09:20, Fu, Zhonghui wrote:
>>>    From e34419970a07bfcd365f9c66bdfa552188a0cd26 Mon Sep 17 00:00:00 2001
>>> From: Zhonghui Fu<zhonghui.fu@...ux.intel.com>
>>> Date: Mon, 29 Dec 2014 21:25:31 +0800
>>> Subject: [PATCH] brcmfmac: avoid duplicated suspend/resume operation
>>>
>>> WiFi chip has 2 SDIO functions, and PM core will trigger
>>> twice suspend/resume operations for one WiFi chip to do
>>> the same things. This patch avoid this case.
>>
>> We have a patch queued up for this as well, but this one looks good enough although I personally prefer container_of() instead of dev_to_sdio_func().
>>
>> Acked-by: Arend van Spriel<arend@...adcom.com>
>>> Signed-off-by: Zhonghui Fu<zhonghui.fu@...ux.intel.com>
>>> ---
>>>    drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c |   19 +++++++++++++++++--
>>>    1 files changed, 17 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> index 3c06e93..eee7818 100644
>>> --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> @@ -1139,11 +1139,18 @@ void brcmf_sdio_wowl_config(struct device *dev, bool enabled)
>>>    static int brcmf_ops_sdio_suspend(struct device *dev)
>>>    {
>>>        struct brcmf_bus *bus_if = dev_get_drvdata(dev);
>>> -    struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
>>> +    struct brcmf_sdio_dev *sdiodev;
>>>        mmc_pm_flag_t sdio_flags;
>>> +    struct sdio_func *func = dev_to_sdio_func(dev);
>>>
>>>        brcmf_dbg(SDIO, "Enter\n");
>>>
>>> +    if (func->num == 2) {
>>> +        return 0;
>>> +    }
>>> +
>>> +    sdiodev = bus_if->bus_priv.sdio;
>>> +
>>>        atomic_set(&sdiodev->suspend, true);
>>>
>>>        if (sdiodev->wowl_enabled) {
>>> @@ -1164,9 +1171,17 @@ static int brcmf_ops_sdio_suspend(struct device *dev)
>>>    static int brcmf_ops_sdio_resume(struct device *dev)
>>>    {
>>>        struct brcmf_bus *bus_if = dev_get_drvdata(dev);
>>> -    struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
>>> +    struct brcmf_sdio_dev *sdiodev;
>>> +    struct sdio_func *func = dev_to_sdio_func(dev);
>>>
>>>        brcmf_dbg(SDIO, "Enter\n");
>>> +
>>> +    if (func->num == 2) {
>>> +        return 0;
>>> +    }
>>> +
>>> +    sdiodev = bus_if->bus_priv.sdio;
>>> +
>>>        if (sdiodev->pdata->oob_irq_supported)
>>>            disable_irq_wake(sdiodev->pdata->oob_irq_nr);
>>>        brcmf_sdio_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
>>> -- 1.7.1
>>>
>>
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