diff -Naur a/src/shared/linux_osl.c b/src/shared/linux_osl.c
--- a/src/shared/linux_osl.c	2015-09-19 00:47:30.000000000 +0200
+++ b/src/shared/linux_osl.c	2020-12-14 13:34:41.810370857 +0100
@@ -30,6 +30,7 @@
 #include <pcicfg.h>
 
 #include <linux/fs.h>
+#include <linux/io.h>
 
 #define PCI_CFG_RETRY 		10
 
@@ -942,7 +943,7 @@
 void *
 osl_reg_map(uint32 pa, uint size)
 {
-	return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
+	return (ioremap((unsigned long)pa, (unsigned long)size));
 }
 
 void
@@ -1072,11 +1073,21 @@
 {
 	struct file *fp = (struct file *)image;
 	int rdlen;
+	loff_t pos;
 
 	if (!image)
 		return 0;
 
-	rdlen = kernel_read(fp, fp->f_pos, buf, len);
+	pos = fp->f_pos;
+	rdlen = kernel_read(fp, 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
+			pos, 
+#endif
+			buf, len
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
+			,&pos 
+#endif
+	);
 	if (rdlen > 0)
 		fp->f_pos += rdlen;
 
diff -Naur a/src/wl/sys/wl_cfg80211_hybrid.c b/src/wl/sys/wl_cfg80211_hybrid.c
--- a/src/wl/sys/wl_cfg80211_hybrid.c	2015-09-19 00:47:30.000000000 +0200
+++ b/src/wl/sys/wl_cfg80211_hybrid.c	2020-12-14 13:37:21.520354758 +0100
@@ -30,6 +30,9 @@
 #include <linux/kthread.h>
 #include <linux/netdevice.h>
 #include <linux/ieee80211.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
+#include <linux/sched/signal.h>
+#endif
 #include <net/cfg80211.h>
 #include <linux/nl80211.h>
 #include <net/rtnetlink.h>
@@ -38,11 +41,17 @@
 #include <wlioctl.h>
 #include <proto/802.11.h>
 #include <wl_cfg80211_hybrid.h>
+#include <wl_linux.h>
 
 #define EVENT_TYPE(e) dtoh32((e)->event_type)
 #define EVENT_FLAGS(e) dtoh16((e)->flags)
 #define EVENT_STATUS(e) dtoh32((e)->status)
 
+#ifndef IEEE80211_BAND_2GHZ
+#define IEEE80211_BAND_2GHZ NL80211_BAND_2GHZ
+#define IEEE80211_BAND_5GHZ NL80211_BAND_5GHZ
+#endif
+
 #ifdef BCMDBG
 u32 wl_dbg_level = WL_DBG_ERR | WL_DBG_INFO;
 #else
@@ -50,7 +59,11 @@
 #endif
 
 static s32 wl_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
+           enum nl80211_iftype type, struct vif_params *params);
+#else
            enum nl80211_iftype type, u32 *flags, struct vif_params *params);
+#endif
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
 static s32
 wl_cfg80211_scan(struct wiphy *wiphy,
@@ -435,35 +448,17 @@
 static s32
 wl_dev_ioctl(struct net_device *dev, u32 cmd, void *arg, u32 len)
 {
-	struct ifreq ifr;
-	struct wl_ioctl ioc;
-	mm_segment_t fs;
-	s32 err = 0;
-
 	BUG_ON(len < sizeof(int));
-
-	memset(&ioc, 0, sizeof(ioc));
-	ioc.cmd = cmd;
-	ioc.buf = arg;
-	ioc.len = len;
-	strcpy(ifr.ifr_name, dev->name);
-	ifr.ifr_data = (caddr_t)&ioc;
-
-	fs = get_fs();
-	set_fs(get_ds());
-#if defined(WL_USE_NETDEV_OPS)
-	err = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#else
-	err = dev->do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#endif
-	set_fs(fs);
-
-	return err;
+	return wlc_ioctl_internal(dev, cmd, arg, len);
 }
 
 static s32
 wl_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
+                         enum nl80211_iftype type,
+#else
                          enum nl80211_iftype type, u32 *flags,
+#endif
    struct vif_params *params)
 {
 	struct wl_cfg80211_priv *wl = wiphy_to_wl(wiphy);
@@ -2358,6 +2353,20 @@
                     const wl_event_msg_t *e, void *data)
 {
 	struct wl_cfg80211_connect_info *conn_info = wl_to_conn(wl);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
+	struct cfg80211_bss *bss;
+	struct wlc_ssid *ssid;
+	ssid = &wl->profile->ssid;
+	bss = cfg80211_get_bss(wl_to_wiphy(wl), NULL, (s8 *)&wl->bssid,
+	ssid->SSID, ssid->SSID_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
+	struct cfg80211_roam_info roam_info = {
+		.bss = bss,
+		.req_ie = conn_info->req_ie,
+		.req_ie_len = conn_info->req_ie_len,
+		.resp_ie = conn_info->resp_ie,
+		.resp_ie_len = conn_info->resp_ie_len,
+	};
+#endif
 	s32 err = 0;
 
 	wl_get_assoc_ies(wl);
@@ -2365,12 +2374,17 @@
 	memcpy(&wl->bssid, &e->addr, ETHER_ADDR_LEN);
 	wl_update_bss_info(wl);
 	cfg80211_roamed(ndev,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
+			&roam_info,
+#else
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 39)
 			&wl->conf->channel,	 
 #endif
 			(u8 *)&wl->bssid,
 			conn_info->req_ie, conn_info->req_ie_len,
-			conn_info->resp_ie, conn_info->resp_ie_len, GFP_KERNEL);
+			conn_info->resp_ie, conn_info->resp_ie_len,
+#endif
+			GFP_KERNEL);
 	WL_DBG(("Report roaming result\n"));
 
 	set_bit(WL_STATUS_CONNECTED, &wl->status);
@@ -2386,8 +2400,15 @@
 	s32 err = 0;
 
 	if (wl->scan_request) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+		struct cfg80211_scan_info info = {
+			.aborted = true
+		};
 		WL_DBG(("%s: Aborting scan\n", __FUNCTION__));
-		cfg80211_scan_done(wl->scan_request, true);     
+		cfg80211_scan_done(wl->scan_request, &info);
+#else
+		cfg80211_scan_done(wl->scan_request, true);
+#endif
 		wl->scan_request = NULL;
 	}
 
@@ -2488,7 +2509,14 @@
 
 scan_done_out:
 	if (wl->scan_request) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+		struct cfg80211_scan_info info = {
+			.aborted = false
+		};
+		cfg80211_scan_done(wl->scan_request, &info);
+#else
 		cfg80211_scan_done(wl->scan_request, false);
+#endif
 		wl->scan_request = NULL;
 	}
 	rtnl_unlock();
@@ -2913,7 +2941,14 @@
 	s32 err = 0;
 
 	if (wl->scan_request) {
-		cfg80211_scan_done(wl->scan_request, true);	
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+		struct cfg80211_scan_info info = {
+			.aborted = true
+		};
+		cfg80211_scan_done(wl->scan_request, &info);
+#else
+		cfg80211_scan_done(wl->scan_request, true);
+#endif
 		wl->scan_request = NULL;
 	}
 
diff -Naur a/src/wl/sys/wlc_pub.h b/src/wl/sys/wlc_pub.h
--- a/src/wl/sys/wlc_pub.h	2015-09-19 00:47:30.000000000 +0200
+++ b/src/wl/sys/wlc_pub.h	2020-12-14 13:37:21.522354770 +0100
@@ -24,6 +24,7 @@
 
 #include <wlc_types.h>
 #include <wlc_utils.h>
+#include <siutils.h>
 #include "proto/802.11.h"
 #include "proto/bcmevent.h"
 
diff -Naur a/src/wl/sys/wl_iw.c b/src/wl/sys/wl_iw.c
--- a/src/wl/sys/wl_iw.c	2015-09-19 00:47:30.000000000 +0200
+++ b/src/wl/sys/wl_iw.c	2020-12-14 13:37:21.521354764 +0100
@@ -37,6 +37,7 @@
 
 #include <wl_dbg.h>
 #include <wl_iw.h>
+#include <wl_linux.h>
 
 extern bool wl_iw_conn_status_str(uint32 event_type, uint32 status,
 	uint32 reason, char* stringBuf, uint buflen);
@@ -103,29 +104,7 @@
 	int len
 )
 {
-	struct ifreq ifr;
-	wl_ioctl_t ioc;
-	mm_segment_t fs;
-	int ret;
-
-	memset(&ioc, 0, sizeof(ioc));
-	ioc.cmd = cmd;
-	ioc.buf = arg;
-	ioc.len = len;
-
-	strcpy(ifr.ifr_name, dev->name);
-	ifr.ifr_data = (caddr_t) &ioc;
-
-	fs = get_fs();
-	set_fs(get_ds());
-#if defined(WL_USE_NETDEV_OPS)
-	ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#else
-	ret = dev->do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#endif
-	set_fs(fs);
-
-	return ret;
+	return wlc_ioctl_internal(dev, cmd, arg, len);
 }
 
 static int
diff -Naur a/src/wl/sys/wl_linux.c b/src/wl/sys/wl_linux.c
--- a/src/wl/sys/wl_linux.c	2015-09-19 00:47:30.000000000 +0200
+++ b/src/wl/sys/wl_linux.c	2020-12-14 13:37:21.522354770 +0100
@@ -45,6 +45,7 @@
 #include <linux/completion.h>
 #include <linux/usb.h>
 #include <linux/pci_ids.h>
+#include <linux/io.h>
 #define WLC_MAXBSSCFG		1	
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0)
@@ -93,7 +94,13 @@
 
 #include <wlc_wowl.h>
 
-static void wl_timer(ulong data);
+static void wl_timer(
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+		struct timer_list *tl
+#else
+		ulong data
+#endif
+		);
 static void _wl_timer(wl_timer_t *t);
 static struct net_device *wl_alloc_linux_if(wl_if_t *wlif);
 
@@ -117,6 +124,9 @@
 
 typedef struct priv_link {
 	wl_if_t *wlif;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
+	unsigned long last_rx;
+#endif
 } priv_link_t;
 
 #define WL_DEV_IF(dev)          ((wl_if_t*)((priv_link_t*)DEV_PRIV(dev))->wlif)
@@ -582,7 +592,7 @@
 	}
 	wl->bcm_bustype = bustype;
 
-	if ((wl->regsva = ioremap_nocache(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
+	if ((wl->regsva = ioremap(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
 		WL_ERROR(("wl%d: ioremap() failed\n", unit));
 		goto fail;
 	}
@@ -772,7 +782,7 @@
 	if ((val & 0x0000ff00) != 0)
 		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
 		bar1_size = pci_resource_len(pdev, 2);
-		bar1_addr = (uchar *)ioremap_nocache(pci_resource_start(pdev, 2),
+		bar1_addr = (uchar *)ioremap(pci_resource_start(pdev, 2),
 			bar1_size);
 	wl = wl_attach(pdev->vendor, pdev->device, pci_resource_start(pdev, 0), PCI_BUS, pdev,
 		pdev->irq, bar1_addr, bar1_size);
@@ -1643,10 +1653,7 @@
 		goto done2;
 	}
 
-	if (segment_eq(get_fs(), KERNEL_DS))
-		buf = ioc.buf;
-
-	else if (ioc.buf) {
+	if (ioc.buf) {
 		if (!(buf = (void *) MALLOC(wl->osh, MAX(ioc.len, WLC_IOCTL_MAXLEN)))) {
 			bcmerror = BCME_NORESOURCE;
 			goto done2;
@@ -1667,7 +1674,7 @@
 	WL_UNLOCK(wl);
 
 done1:
-	if (ioc.buf && (ioc.buf != buf)) {
+	if (ioc.buf) {
 		if (copy_to_user(ioc.buf, buf, ioc.len))
 			bcmerror = BCME_BADADDR;
 		MFREE(wl->osh, buf, MAX(ioc.len, WLC_IOCTL_MAXLEN));
@@ -1680,6 +1687,39 @@
 	return (OSL_ERROR(bcmerror));
 }
 
+int
+wlc_ioctl_internal(struct net_device *dev, int cmd, void *buf, int len)
+{
+	wl_info_t *wl;
+	wl_if_t *wlif;
+	int bcmerror;
+
+	if (!dev)
+		return -ENETDOWN;
+
+	wl = WL_INFO(dev);
+	wlif = WL_DEV_IF(dev);
+	if (wlif == NULL || wl == NULL || wl->dev == NULL)
+		return -ENETDOWN;
+
+	bcmerror = 0;
+
+	WL_TRACE(("wl%d: wlc_ioctl_internal: cmd 0x%x\n", wl->pub->unit, cmd));
+
+	WL_LOCK(wl);
+	if (!capable(CAP_NET_ADMIN)) {
+		bcmerror = BCME_EPERM;
+	} else {
+		bcmerror = wlc_ioctl(wl->wlc, cmd, buf, len, wlif->wlcif);
+	}
+	WL_UNLOCK(wl);
+
+	ASSERT(VALID_BCMERROR(bcmerror));
+	if (bcmerror != 0)
+		wl->pub->bcmerror = bcmerror;
+	return (OSL_ERROR(bcmerror));
+}
+
 static struct net_device_stats*
 wl_get_stats(struct net_device *dev)
 {
@@ -2165,8 +2205,8 @@
 	wlif = WL_DEV_IF(dev);
 	wl = WL_INFO(dev);
 
+	skb->prev = NULL;
 	if (WL_ALL_PASSIVE_ENAB(wl) || (WL_RTR() && WL_CONFIG_SMP())) {
-		skb->prev = NULL;
 
 		TXQ_LOCK(wl);
 
@@ -2298,9 +2338,19 @@
 }
 
 static void
-wl_timer(ulong data)
-{
-	wl_timer_t *t = (wl_timer_t *)data;
+wl_timer(
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+		struct timer_list *tl
+#else
+		ulong data
+#endif
+) {
+	wl_timer_t *t =
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+		from_timer(t, tl, timer);
+#else
+		(wl_timer_t *)data;
+#endif
 
 	if (!WL_ALL_PASSIVE_ENAB(t->wl))
 		_wl_timer(t);
@@ -2352,9 +2402,13 @@
 
 	bzero(t, sizeof(wl_timer_t));
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+	timer_setup(&t->timer, wl_timer, 0);
+#else
 	init_timer(&t->timer);
 	t->timer.data = (ulong) t;
 	t->timer.function = wl_timer;
+#endif
 	t->wl = wl;
 	t->fn = fn;
 	t->arg = arg;
@@ -2449,6 +2503,9 @@
 {
 	struct sk_buff *oskb = (struct sk_buff *)p;
 	struct sk_buff *skb;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
+	priv_link_t *priv_link;
+#endif
 	uchar *pdata;
 	uint len;
 
@@ -2915,7 +2972,13 @@
 	if (skb == NULL) return;
 
 	skb->dev = wl->monitor_dev;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
+	priv_link = MALLOC(wl->osh, sizeof(priv_link_t));
+	priv_link = netdev_priv(skb->dev);
+	priv_link->last_rx = jiffies;
+#else
 	skb->dev->last_rx = jiffies;
+#endif
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
 	skb_reset_mac_header(skb);
 #else
@@ -3335,10 +3398,16 @@
 }
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5,6,0)
 static const struct file_operations wl_fops = {
 	.owner	= THIS_MODULE,
 	.read	= wl_proc_read,
 	.write	= wl_proc_write,
+#else
+static const struct proc_ops wl_fops = {
+	.proc_read   = wl_proc_read,
+	.proc_write  = wl_proc_write,
+#endif
 };
 #endif
 
diff -Naur a/src/wl/sys/wl_linux.h b/src/wl/sys/wl_linux.h
--- a/src/wl/sys/wl_linux.h	2015-09-19 00:47:30.000000000 +0200
+++ b/src/wl/sys/wl_linux.h	2020-12-14 13:37:21.522354770 +0100
@@ -22,6 +22,7 @@
 #define _wl_linux_h_
 
 #include <wlc_types.h>
+#include <wlc_pub.h>
 
 typedef struct wl_timer {
 	struct timer_list 	timer;
@@ -187,6 +188,7 @@
 extern int __devinit wl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 extern void wl_free(wl_info_t *wl);
 extern int  wl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+extern int wlc_ioctl_internal(struct net_device *dev, int cmd, void *buf, int len);
 extern struct net_device * wl_netdev_get(wl_info_t *wl);
 
 #endif