STAGING: brcm80211 v2 keep power on in suspend state

Keep WIFI power on during suspend.

Consumes 10s of milliwatts but avoids having to reload firmware
on resume. Tested on tegra2_seaboard.
Signed-off-by: Venkat Rao <vrao@broadcom.com>
Tested-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc.c

@@ -68,6 +68,13 @@ DHD_PM_RESUME_WAIT_INIT(sdioh_request_buffer_wait);
 int sdioh_sdmmc_card_regread(sdioh_info_t *sd, int func, u32 regaddr,
 			     int regsize, u32 *data);
 
+void sdioh_sdio_set_host_pm_flags(int flag)
+{
+	if (sdio_set_host_pm_flags(gInstance->func[1], flag))
+		printk(KERN_ERR "%s: Failed to set pm_flags 0x%08x\n",\
+			 __func__, (unsigned int)flag);
+}
+
 static int sdioh_sdmmc_card_enablefuncs(sdioh_info_t *sd)
 {
 	int err_ret;

drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c

@@ -39,6 +39,8 @@
 #include <linux/firmware.h>
 #include <wl_cfg80211.h>
 
+void sdioh_sdio_set_host_pm_flags(int flag);
+
 static struct sdio_func *cfg80211_sdio_func;
 static struct wl_dev *wl_cfg80211_dev;
 static const u8 ether_bcast[ETH_ALEN] = {255, 255, 255, 255, 255, 255};
@@ -1988,6 +1990,8 @@ static s32 wl_cfg80211_suspend(struct wiphy *wiphy)
 	clear_bit(WL_STATUS_SCANNING, &wl->status);
 	clear_bit(WL_STATUS_SCAN_ABORTING, &wl->status);
 
+	sdioh_sdio_set_host_pm_flags(MMC_PM_KEEP_POWER);
+
 	return err;
 }