staging: brcm80211: use address space qualifier in brcmfmac

Several sparse warning were issued due to missing __user qualifier
for brcmfmac variables. This patch adds those.

Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmfmac/dhd.h

@@ -779,7 +779,7 @@ extern void brcmf_c_pktfilter_offload_enable(struct brcmf_pub *drvr, char *arg,
 /* Linux network driver ioctl encoding */
 struct brcmf_c_ioctl {
 	uint cmd;		/* common ioctl definition */
-	void *buf;		/* pointer to user buffer */
+	void __user *buf;	/* pointer to user buffer */
 	uint len;		/* length of user buffer */
 	bool set;		/* get or set request (optional) */
 	uint used;		/* bytes read or written (optional) */

drivers/staging/brcm80211/brcmfmac/dhd_linux.c

@@ -835,7 +835,7 @@ static struct ethtool_ops brcmf_ethtool_ops = {
 	.get_drvinfo = brcmf_ethtool_get_drvinfo
 };
 
-static int brcmf_ethtool(struct brcmf_info *drvr_priv, void *uaddr)
+static int brcmf_ethtool(struct brcmf_info *drvr_priv, void __user *uaddr)
 {
 	struct ethtool_drvinfo info;
 	char drvname[sizeof(info.driver)];
@@ -1001,7 +1001,7 @@ static int brcmf_netdev_ioctl_entry(struct net_device *net, struct ifreq *ifr,
 	}
 
 	/* To differentiate read 4 more byes */
-	if ((copy_from_user(&driver, (char *)ifr->ifr_data +
+	if ((copy_from_user(&driver, (char __user *)ifr->ifr_data +
 			    sizeof(struct brcmf_ioctl), sizeof(uint)) != 0)) {
 		bcmerror = -EINVAL;
 		goto done;

drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c

@@ -540,7 +540,7 @@ brcmf_dev_ioctl(struct net_device *dev, u32 cmd, void *arg, u32 len)
 	ioc.buf = arg;
 	ioc.len = len;
 	strcpy(ifr.ifr_name, dev->name);
-	ifr.ifr_data = (caddr_t)&ioc;
+	ifr.ifr_data = (char __user *)&ioc;
 
 	fs = get_fs();
 	set_fs(get_ds());