linux-kernel - [PATCH 2/2] brcmfmac: keep WiFi chip's power during system suspension

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Date:	Mon, 27 Apr 2015 13:06:43 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	"brudley@...adcom.com" <brudley@...adcom.com>,
	Arend van Spriel <arend@...adcom.com>,
	Franky Lin <frankyl@...adcom.com>,
	"meuleman@...adcom.com" <meuleman@...adcom.com>,
	Kalle Valo <kvalo@...eaurora.org>,
	"pieterpg@...adcom.com" <pieterpg@...adcom.com>,
	"hdegoede@...hat.com" <hdegoede@...hat.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"brcm80211-dev-list@...adcom.com" <brcm80211-dev-list@...adcom.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] brcmfmac: keep WiFi chip's power during system suspension

Need to keep the power supply for WiFi chip during system suspension.
Otherwise, the context of WiFi chip will be lost.

Signed-off-by: Zhonghui Fu <zhonghui.fu@...ux.intel.com>
---
 drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
index fdf8feb..03d3671 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
@@ -1251,15 +1251,17 @@ static int brcmf_ops_sdio_suspend(struct device *dev)
 	brcmf_sdiod_freezer_on(sdiodev);
 	brcmf_sdio_wd_timer(sdiodev->bus, 0);
 
+	sdio_flags = MMC_PM_KEEP_POWER;
 	if (sdiodev->wowl_enabled) {
-		sdio_flags = MMC_PM_KEEP_POWER;
 		if (sdiodev->pdata->oob_irq_supported)
 			enable_irq_wake(sdiodev->pdata->oob_irq_nr);
 		else
-			sdio_flags = MMC_PM_WAKE_SDIO_IRQ;
-		if (sdio_set_host_pm_flags(sdiodev->func[1], sdio_flags))
-			brcmf_err("Failed to set pm_flags %x\n", sdio_flags);
+			sdio_flags |= MMC_PM_WAKE_SDIO_IRQ;
 	}
+
+	if (sdio_set_host_pm_flags(sdiodev->func[1], sdio_flags))
+		brcmf_err("Failed to set pm_flags %x\n", sdio_flags);
+
 	return 0;
 }
 
-- 1.7.1

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