ath6kl: make maximum number of vifs runtime configurable

Needed when detecting how many vifs firmware supports.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/cfg80211.c

@@ -357,7 +357,7 @@ static bool ath6kl_is_valid_iftype(struct ath6kl *ar, enum nl80211_iftype type,
 
 	if (type == NL80211_IFTYPE_STATION ||
 	    type == NL80211_IFTYPE_AP || type == NL80211_IFTYPE_ADHOC) {
-		for (i = 0; i < MAX_NUM_VIF; i++) {
+		for (i = 0; i < ar->vif_max; i++) {
 			if ((ar->avail_idx_map >> i) & BIT(0)) {
 				*if_idx = i;
 				return true;
@@ -367,7 +367,7 @@ static bool ath6kl_is_valid_iftype(struct ath6kl *ar, enum nl80211_iftype type,
 
 	if (type == NL80211_IFTYPE_P2P_CLIENT ||
 	    type == NL80211_IFTYPE_P2P_GO) {
-		for (i = ar->max_norm_iface; i < MAX_NUM_VIF; i++) {
+		for (i = ar->max_norm_iface; i < ar->vif_max; i++) {
 			if ((ar->avail_idx_map >> i) & BIT(0)) {
 				*if_idx = i;
 				return true;
@@ -1306,7 +1306,7 @@ static struct net_device *ath6kl_cfg80211_add_iface(struct wiphy *wiphy,
 	struct net_device *ndev;
 	u8 if_idx, nw_type;
 
-	if (ar->num_vif == MAX_NUM_VIF) {
+	if (ar->num_vif == ar->vif_max) {
 		ath6kl_err("Reached maximum number of supported vif\n");
 		return ERR_PTR(-EINVAL);
 	}
@@ -2459,6 +2459,8 @@ struct ath6kl *ath6kl_core_alloc(struct device *dev)
 	ar->wiphy = wiphy;
 	ar->dev = dev;
 
+	ar->vif_max = 1;
+
 	if (multi_norm_if_support)
 		ar->max_norm_iface = 2;
 	else

drivers/net/wireless/ath/ath6kl/core.h

@@ -399,7 +399,11 @@ enum ath6kl_hif_type {
 	ATH6KL_HIF_TYPE_USB,
 };
 
-#define MAX_NUM_VIF	1
+/*
+ * Driver's maximum limit, note that some firmwares support only one vif
+ * and the runtime (current) limit must be checked from ar->vif_max.
+ */
+#define ATH6KL_VIF_MAX	1
 
 /* vif flags info */
 enum ath6kl_vif_state {
@@ -498,6 +502,7 @@ struct ath6kl {
 	/* Lock to avoid race in vif_list entries among add/del/traverse */
 	spinlock_t list_lock;
 	u8 num_vif;
+	int vif_max;
 	u8 max_norm_iface;
 	u8 avail_idx_map;
 	spinlock_t lock;

drivers/net/wireless/ath/ath6kl/init.c

@@ -463,7 +463,7 @@ int ath6kl_configure_target(struct ath6kl *ar)
 	 */
 	fw_iftype = HI_OPTION_FW_MODE_BSS_STA;
 
-	for (i = 0; i < MAX_NUM_VIF; i++)
+	for (i = 0; i < ar->vif_max; i++)
 		fw_mode |= fw_iftype << (i * HI_OPTION_FW_MODE_BITS);
 
 	/*
@@ -477,7 +477,7 @@ int ath6kl_configure_target(struct ath6kl *ar)
 		fw_submode |= HI_OPTION_FW_SUBMODE_NONE <<
 			      (i * HI_OPTION_FW_SUBMODE_BITS);
 
-	for (i = ar->max_norm_iface; i < MAX_NUM_VIF; i++)
+	for (i = ar->max_norm_iface; i < ar->vif_max; i++)
 		fw_submode |= HI_OPTION_FW_SUBMODE_P2PDEV <<
 			      (i * HI_OPTION_FW_SUBMODE_BITS);
 
@@ -508,7 +508,7 @@ int ath6kl_configure_target(struct ath6kl *ar)
 		return -EIO;
 	}
 
-	param |= (MAX_NUM_VIF << HI_OPTION_NUM_DEV_SHIFT);
+	param |= (ar->vif_max << HI_OPTION_NUM_DEV_SHIFT);
 	param |= fw_mode << HI_OPTION_FW_MODE_SHIFT;
 	param |= fw_submode << HI_OPTION_FW_SUBMODE_SHIFT;
 
@@ -1482,7 +1482,7 @@ int ath6kl_init_hw_start(struct ath6kl *ar)
 	if ((ath6kl_set_host_app_area(ar)) != 0)
 		ath6kl_err("unable to set the host app area\n");
 
-	for (i = 0; i < MAX_NUM_VIF; i++) {
+	for (i = 0; i < ar->vif_max; i++) {
 		ret = ath6kl_target_config_wlan_params(ar, i);
 		if (ret)
 			goto err_htc_stop;
@@ -1592,7 +1592,7 @@ int ath6kl_core_init(struct ath6kl *ar)
 		goto err_node_cleanup;
 	}
 
-	for (i = 0; i < MAX_NUM_VIF; i++)
+	for (i = 0; i < ar->vif_max; i++)
 		ar->avail_idx_map |= BIT(i);
 
 	rtnl_lock();

drivers/net/wireless/ath/ath6kl/txrx.c

@@ -541,7 +541,7 @@ void ath6kl_tx_complete(void *context, struct list_head *packet_queue)
 	int status;
 	enum htc_endpoint_id eid;
 	bool wake_event = false;
-	bool flushing[MAX_NUM_VIF] = {false};
+	bool flushing[ATH6KL_VIF_MAX] = {false};
 	u8 if_idx;
 	struct ath6kl_vif *vif;
 

drivers/net/wireless/ath/ath6kl/wmi.c

@@ -85,7 +85,7 @@ struct ath6kl_vif *ath6kl_get_vif_by_index(struct ath6kl *ar, u8 if_idx)
 {
 	struct ath6kl_vif *vif, *found = NULL;
 
-	if (WARN_ON(if_idx > (MAX_NUM_VIF - 1)))
+	if (WARN_ON(if_idx > (ar->vif_max - 1)))
 		return NULL;
 
 	/* FIXME: Locking */
@@ -187,7 +187,7 @@ int ath6kl_wmi_data_hdr_add(struct wmi *wmi, struct sk_buff *skb,
 	struct wmi_data_hdr *data_hdr;
 	int ret;
 
-	if (WARN_ON(skb == NULL || (if_idx > MAX_NUM_VIF - 1)))
+	if (WARN_ON(skb == NULL || (if_idx > wmi->parent_dev->vif_max - 1)))
 		return -EINVAL;
 
 	if (tx_meta_info) {
@@ -1620,7 +1620,7 @@ int ath6kl_wmi_cmd_send(struct wmi *wmi, u8 if_idx, struct sk_buff *skb,
 	int ret;
 	u16 info1;
 
-	if (WARN_ON(skb == NULL || (if_idx > (MAX_NUM_VIF - 1))))
+	if (WARN_ON(skb == NULL || (if_idx > (wmi->parent_dev->vif_max - 1))))
 		return -EINVAL;
 
 	ath6kl_dbg(ATH6KL_DBG_WMI, "wmi tx id %d len %d flag %d\n",