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

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Message-ID: <54A3C837.6040400@broadcom.com>
Date:	Wed, 31 Dec 2014 10:56:07 +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 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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