Change:
<ins> --- a/src/wl/sys/wl_cfg80211_hybrid.c	2014-06-26 12:42:08.000000000 +0200 +++ b/src/wl/sys/wl_cfg80211_hybrid.c	2015-04-13 13:20:08.140013177 +0200 @@ -63,8 +63,13 @@ static s32 wl_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_ibss_params *params); static s32 wl_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev); +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 0) static s32 wl_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev, u8 *mac, struct station_info *sinfo); +#else +static s32 wl_cfg80211_get_station(struct wiphy *wiphy, +           struct net_device *dev, const u8 *mac, struct station_info *sinfo); +#endif static s32 wl_cfg80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev, bool enabled, s32 timeout); static int wl_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev, @@ -1387,7 +1392,7 @@ key_endian_to_host(&key); params.key_len = (u8) min_t(u8, DOT11_MAX_KEY_SIZE, key.len); -	memcpy(params.key, key.data, params.key_len); +	memcpy((char *)params.key, key.data, params.key_len); if ((err = wl_dev_ioctl(dev, WLC_GET_WSEC, &wsec, sizeof(wsec)))) { return err; @@ -1421,9 +1426,15 @@ return err; } +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 0) static s32 wl_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev, u8 *mac, struct station_info *sinfo) +#else +static s32 +wl_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev, +                        const u8 *mac, struct station_info *sinfo) +#endif { struct wl_cfg80211_priv *wl = wiphy_to_wl(wiphy); scb_val_t scb_val; @@ -1441,7 +1452,11 @@ WL_DBG(("Could not get rate (%d)n", err)); } else { rate = dtoh32(rate); +#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0) sinfo->filled |= STATION_INFO_TX_BITRATE; +#else +		sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); +#endif sinfo->txrate.legacy = rate * 5; WL_DBG(("Rate %d Mbpsn", (rate / 2))); } @@ -1454,7 +1469,11 @@ return err; } rssi = dtoh32(scb_val.val); +#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0) sinfo->filled |= STATION_INFO_SIGNAL; +#else +		sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); +#endif sinfo->signal = rssi; WL_DBG(("RSSI %d dBmn", rssi)); } @@ -2010,9 +2029,15 @@ notify_ie = (u8 *)bi + le16_to_cpu(bi->ie_offset); notify_ielen = le32_to_cpu(bi->ie_length); +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0) cbss = cfg80211_inform_bss(wiphy, channel, (const u8 *)(bi->BSSID.octet), 0, beacon_proberesp->capab_info, beacon_proberesp->beacon_int, (const u8 *)notify_ie, notify_ielen, signal, GFP_KERNEL); +#else +	cbss = cfg80211_inform_bss(wiphy, channel, CFG80211_BSS_FTYPE_UNKNOWN, (const u8 *)(bi->BSSID.octet), +		0, beacon_proberesp->capab_info, beacon_proberesp->beacon_int, +		(const u8 *)notify_ie, notify_ielen, signal, GFP_KERNEL); +#endif if (unlikely(!cbss)) return -ENOMEM; @@ -2071,7 +2096,26 @@ wl_get_assoc_ies(wl); memcpy(&wl->bssid, &e->addr, ETHER_ADDR_LEN); wl_update_bss_info(wl); +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0) +			{ +				struct wl_bss_info *bi; +				u16 bss_info_channel; +				struct ieee80211_channel *channel; +				u32 freq; + +				bi = (struct wl_bss_info *)(wl->extra_buf + 4); +				bss_info_channel = bi->ctl_ch ? bi->ctl_ch : CHSPEC_CHANNEL(bi->chanspec); + +				freq = ieee80211_channel_to_frequency(bss_info_channel, +				       (bss_info_channel <= CH_MAX_2G_CHANNEL) ? +				       IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ); + +				channel = ieee80211_get_channel(wl_to_wiphy(wl), freq); +				cfg80211_ibss_joined(ndev, (u8 *)&wl->bssid, channel, GFP_KERNEL); +			} +#else cfg80211_ibss_joined(ndev, (u8 *)&wl->bssid, GFP_KERNEL); +#endif set_bit(WL_STATUS_CONNECTED, &wl->status); wl->profile->active = true; } @@ -2629,7 +2673,15 @@ void wl_cfg80211_detach(struct net_device *ndev) { -	struct wl_cfg80211_priv *wl = ndev_to_wl(ndev); +	struct wl_cfg80211_priv *wl; +	struct wireless_dev *wdev; + +	wdev = ndev->ieee80211_ptr; +	if (wdev == NULL) { +                printk(KERN_ERR "[%s()] in ndev=%p: IEEE80211ptr=%pn", __FUNCTION__, ndev, wdev); +                return; +        } +	wl = ndev_to_wl(ndev); wl_deinit_cfg80211_priv(wl); wl_free_wdev(wl); --- a/src/wl/sys/wl_dbg.h	2014-06-26 12:42:08.000000000 +0200 +++ b/src/wl/sys/wl_dbg.h	2015-04-13 13:19:52.443345832 +0200 @@ -55,10 +55,12 @@ #define WL_NONE(args) +#define FORCE_TRACE_LEVEL(fmt, ...) do { printk(KERN_ERR fmt, ## __VA_ARGS__); } while (0) /* ## is GCC specific syntax to remove comma when single arg */ + #ifdef BCMDBG_ERR #define	WL_ERROR(args)		WL_PRINT(args) #else -#define	WL_ERROR(args) +#define	WL_ERROR(args)		FORCE_TRACE_LEVEL args #endif #define	WL_TRACE(args) #define WL_APSTA_UPDN(args) --- a/src/wl/sys/wl_linux.c	2014-06-26 12:42:08.000000000 +0200 +++ b/src/wl/sys/wl_linux.c	2015-04-13 13:19:52.443345832 +0200 @@ -878,7 +878,7 @@ static SIMPLE_DEV_PM_OPS(wl_pm_ops, wl_suspend, wl_resume); #endif -static struct pci_driver wl_pci_driver = { +static struct pci_driver wl_pci_driver __refdata = { .name =		"wl", .probe =	wl_pci_probe, .remove =	__devexit_p(wl_remove), @@ -1270,6 +1270,7 @@ MFREE(wl->osh, wlif->dev, sizeof(struct net_device)); #else free_netdev(wlif->dev); +		wlif->dev = NULL; #endif } @@ -1307,7 +1308,12 @@ dev->priv = priv_link; #else +#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)) dev = alloc_netdev(sizeof(priv_link_t), intf_name, ether_setup); +#else +	dev = alloc_netdev(sizeof(priv_link_t), intf_name, NET_NAME_UNKNOWN, +			   ether_setup); +#endif if (!dev) { WL_ERROR(("wl%d: %s: alloc_netdev failedn", (wl->pub)?wl->pub->unit:wlif->subunit, __FUNCTION__)); @@ -1651,11 +1657,7 @@ } WL_LOCK(wl); -	if (!capable(CAP_NET_ADMIN)) { -		bcmerror = BCME_EPERM; -	} else { -		bcmerror = wlc_ioctl(wl->wlc, ioc.cmd, buf, ioc.len, wlif->wlcif); -	} +	bcmerror = wlc_ioctl(wl->wlc, ioc.cmd, buf, ioc.len, wlif->wlcif); WL_UNLOCK(wl); done1: @@ -2157,8 +2159,8 @@ 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); @@ -2455,8 +2457,10 @@ p80211msg_t *phdr; len = sizeof(p80211msg_t) + oskb->len - D11_PHY_HDR_LEN; -		if ((skb = dev_alloc_skb(len)) == NULL) +		if ((skb = dev_alloc_skb(len)) == NULL) { +			WL_ERROR(("in %s:%d [%s()] dev_alloc_skb() failure!", __FILE__, __LINE__, __FUNCTION__)); return; +		} skb_put(skb, len); phdr = (p80211msg_t*)skb->data; @@ -2535,8 +2539,10 @@ rtap_len = sizeof(wl_radiotap_ht_brcm_2_t); len = rtap_len + (oskb->len - D11_PHY_HDR_LEN); -		if ((skb = dev_alloc_skb(len)) == NULL) +		if ((skb = dev_alloc_skb(len)) == NULL) { +			WL_ERROR(("in %s:%d [%s()] dev_alloc_skb() failure!", __FILE__, __LINE__, __FUNCTION__)); return; +		} skb_put(skb, len); @@ -2664,8 +2670,10 @@ len += amsdu_len; } -		if ((skb = dev_alloc_skb(len)) == NULL) +		if ((skb = dev_alloc_skb(len)) == NULL) { +			WL_ERROR(("in %s:%d [%s()] dev_alloc_skb() failure!", __FILE__, __LINE__, __FUNCTION__)); return; +		} skb_put(skb, len); @@ -2990,7 +2998,7 @@ } void -wl_set_monitor(wl_info_t *wl, int val) +wl_set_monitor(wl_info_t *wl, int val) /* public => is called by wlc_hybrid.o_shipped */ { const char *devname; wl_if_t *wlif; @@ -3224,42 +3232,75 @@ #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0) static int wl_proc_read(char *buffer, char **start, off_t offset, int length, int *eof, void *data) +{ +	wl_info_t * wl = (wl_info_t *)data; #else static ssize_t -wl_proc_read(struct file *filp, char __user *buffer, size_t length, loff_t *data) -#endif +wl_proc_read(struct file *filp, char __user *buffer, size_t length, loff_t *offp) { -	wl_info_t * wl = (wl_info_t *)data; -	int to_user; -	int len; +	wl_info_t * wl = PDE_DATA(file_inode(filp)); +#endif +	int bcmerror, len; +	int to_user = 0; +	char tmp[8]; #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0) if (offset > 0) { *eof = 1; return 0; } +#else +	if (*offp > 0) { /* for example, stop: cat /proc/brcm_monitor0 */ +		return 0; /* 0 <=> EOF */ +	} #endif -	if (!length) { -		WL_ERROR(("%s: Not enough return buf spacen", __FUNCTION__)); -		return 0; -	} WL_LOCK(wl); -	wlc_ioctl(wl->wlc, WLC_GET_MONITOR, &to_user, sizeof(int), NULL); -	len = sprintf(buffer, "%dn", to_user); -	WL_UNLOCK(wl); -	return len; +	bcmerror = wlc_ioctl(wl->wlc, WLC_GET_MONITOR, &to_user, sizeof(int), NULL); + 	WL_UNLOCK(wl); + +	if (bcmerror != BCME_OK) { +		WL_ERROR(("%s: GET_MONITOR failed with %dn", __FUNCTION__, bcmerror)); +		return -EIO; +	} + + 	len = snprintf(tmp, ARRAY_SIZE(tmp), "%dn", to_user); +	tmp[ARRAY_SIZE(tmp) - 1] = '0'; +	if (len >= ARRAY_SIZE(tmp)) { +		printk(KERN_ERR "%s:%d [%s()] output would be truncated (ret=%d)!", __FILE__, __LINE__, __FUNCTION__, len); +		return -ERANGE; +	} +	else if (len < 0) { +		printk(KERN_ERR "%s:%d [%s()] unable to convert value (ret=%d)!", __FILE__, __LINE__, __FUNCTION__, len); +		return len; +	} +	if (length < len) { +		printk(KERN_ERR "%s:%d [%s()] user buffer is too small (at least=%d ; user=%d)!", __FILE__, __LINE__, __FUNCTION__, len, (int)length); +		return -EMSGSIZE; +	} +	if (copy_to_user(buffer, tmp, len) != 0) { +		printk(KERN_ERR "%s:%d [%s()] unable to copy data!", __FILE__, __LINE__, __FUNCTION__); +		return -EFAULT; +	} + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0) +	*offp += len; +#endif + + 	return len; } #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0) static int wl_proc_write(struct file *filp, const char *buff, unsigned long length, void *data) +{ +	wl_info_t * wl = (wl_info_t *)data; #else static ssize_t -wl_proc_write(struct file *filp, const char __user *buff, size_t length, loff_t *data) -#endif +wl_proc_write(struct file *filp, const char __user *buff, size_t length, loff_t *offp) { -	wl_info_t * wl = (wl_info_t *)data; +	wl_info_t * wl = PDE_DATA(file_inode(filp)); +#endif int from_user = 0; int bcmerror; @@ -3270,7 +3311,11 @@ } if (copy_from_user(&from_user, buff, 1)) { WL_ERROR(("%s: copy from user failedn", __FUNCTION__)); -		return -EIO; +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0) + 		return -EIO; +#else +		return -EFAULT; +#endif } if (from_user >= 0x30) @@ -3280,10 +3325,15 @@ bcmerror = wlc_ioctl(wl->wlc, WLC_SET_MONITOR, &from_user, sizeof(int), NULL); WL_UNLOCK(wl); -	if (bcmerror < 0) { +	if (bcmerror != BCME_OK) { WL_ERROR(("%s: SET_MONITOR failed with %dn", __FUNCTION__, bcmerror)); return -EIO; } + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)) && 0 /* no need to update offset because this file should only trigger action... */ +	*offp += length; +#endif + return length; } @@ -3304,8 +3354,8 @@ if ((wl->proc_entry = create_proc_entry(tmp, 0644, NULL)) == NULL) { WL_ERROR(("%s: create_proc_entry %s failedn", __FUNCTION__, tmp)); #else -	if ((wl->proc_entry = proc_create(tmp, 0644, NULL, &wl_fops)) == NULL) { -		WL_ERROR(("%s: proc_create %s failedn", __FUNCTION__, tmp)); +	if ((wl->proc_entry = proc_create_data(tmp, 0644, NULL, &wl_fops, wl)) == NULL) { +		WL_ERROR(("%s: proc_create_data %s failedn", __FUNCTION__, tmp)); #endif ASSERT(0); return -1; </ins>

Discussion:
It will likely be enough to grab a patch from another distro. Maybe I'll look into it tomorrow.
Builds now, but I didn't try running it.