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

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Message-ID: <54A3B1B4.7090705@linux.intel.com>
Date:	Wed, 31 Dec 2014 16:20:04 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	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: [PATCH] brcmfmac: avoid duplicated suspend/resume operation

>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;
+	}
+
+	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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