linux-kernel - Re: [PATCH v3] brcmfmac: avoid duplicated suspend/resume operation

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Message-ID: <54E05961.7000201@broadcom.com>
Date:	Sun, 15 Feb 2015 09:31:29 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	Pat Erley <pat-lkml@...ey.org>
CC:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>,
	Kalle Valo <kvalo@...eaurora.org>, <brudley@...adcom.com>,
	Franky Lin <frankyl@...adcom.com>, <meuleman@...adcom.com>,
	<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" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] brcmfmac: avoid duplicated suspend/resume operation

On 02/15/15 04:27, Pat Erley wrote:
> On 02/14/2015 08:40 PM, Fu, Zhonghui wrote:
>>
>> Any comments to this patch? Can it be accepted?

I assume that patches are queued up until after the merge window that we 
are currently in.

>> Thanks,
>> Zhonghui
>>
>> On 2015/2/12 11:26, Fu, Zhonghui wrote:
>>> From a05d35ab334c20970c236fb971dae88810078c88 Mon Sep 17 00:00:00 2001
>>> From: Fu Zhonghui <zhonghui.fu@...ux.intel.com>
>>> Date: Thu, 12 Feb 2015 10:49:35 +0800
>>> Subject: [PATCH v3] 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.
>>>
>>> Acked-by: Arend van Spriel <arend@...adcom.com>
>>> Signed-off-by: Fu Zhonghui <zhonghui.fu@...ux.intel.com>
>>> ---
>>> Changes in v3:
>>> - Rebase to wireless-drivers-next/master branch
>>>
>>> drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 13 ++++++++++++-
>>> 1 file changed, 12 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> index 7944224..b8832a7 100644
>>> --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
>>> @@ -1117,9 +1117,13 @@ static int brcmf_ops_sdio_suspend(struct
>>> device *dev)
>>> struct brcmf_bus *bus_if;
>>> 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;
>>> +
>
> Should it be >= 2 instead of == 2 so that if, in the future, a 3+
> SDIO function chip comes out, it's already handled? Not that that
> should hold up the patch or anything, just a curiosity.

The driver only claims functions 1 and 2 during the probe so that assure 
it works for SDIO devices that have more than two functions.

Regards,
Arend

>>> bus_if = dev_get_drvdata(dev);
>>> sdiodev = bus_if->bus_priv.sdio;
>>>
>>> @@ -1148,9 +1152,16 @@ 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 && sdiodev->pdata->oob_irq_supported)
>>> disable_irq_wake(sdiodev->pdata->oob_irq_nr);
>>> brcmf_sdio_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
>>> -- 1.9.1
>>>
>>
>> --
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>

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