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

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Message-ID: <54A3DC80.1080505@cogentembedded.com>
Date:	Wed, 31 Dec 2014 14:22:40 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>, brudley@...adcom.com,
	Arend van Spriel <arend@...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

Hello.

On 12/31/2014 11:20 AM, 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.

> 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;
> +	}

    {} not needed.

[...]
> @@ -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;
> +	}

    Same here.

[...]

WBR, Sergei

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