staging: wfx: simplify hif_set_tx_rate_retry_policy() usage

The structure hif_mib_set_tx_rate_retry_policy come from hardware
API. It is not intended to be manipulated in upper layers of the driver.

So, this patch relocate handling of this structure to
hif_set_tx_rate_retry_policy() (the low level function).
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200115135338.14374-6-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/data_tx.c

@@ -217,9 +217,8 @@ static void wfx_tx_policy_put(struct wfx_vif *wvif, int idx)
 
 static int wfx_tx_policy_upload(struct wfx_vif *wvif)
 {
-	struct hif_mib_set_tx_rate_retry_policy *arg =
-		kzalloc(struct_size(arg, tx_rate_retry_policy, 1), GFP_KERNEL);
 	struct tx_policy *policies = wvif->tx_policy_cache.cache;
+	u8 tmp_rates[12];
 	int i;
 
 	do {
@@ -230,22 +229,13 @@ static int wfx_tx_policy_upload(struct wfx_vif *wvif)
 				break;
 		if (i < HIF_MIB_NUM_TX_RATE_RETRY_POLICIES) {
 			policies[i].uploaded = 1;
-			arg->num_tx_rate_policies = 1;
-			arg->tx_rate_retry_policy[0].policy_index = i;
-			arg->tx_rate_retry_policy[0].short_retry_count = 255;
-			arg->tx_rate_retry_policy[0].long_retry_count = 255;
-			arg->tx_rate_retry_policy[0].first_rate_sel = 1;
-			arg->tx_rate_retry_policy[0].terminate = 1;
-			arg->tx_rate_retry_policy[0].count_init = 1;
-			memcpy(&arg->tx_rate_retry_policy[0].rates,
-			       policies[i].rates, sizeof(policies[i].rates));
+			memcpy(tmp_rates, policies[i].rates, sizeof(tmp_rates));
 			spin_unlock_bh(&wvif->tx_policy_cache.lock);
-			hif_set_tx_rate_retry_policy(wvif, arg);
+			hif_set_tx_rate_retry_policy(wvif, i, tmp_rates);
 		} else {
 			spin_unlock_bh(&wvif->tx_policy_cache.lock);
 		}
 	} while (i < HIF_MIB_NUM_TX_RATE_RETRY_POLICIES);
-	kfree(arg);
 	return 0;
 }
 

drivers/staging/wfx/hif_tx_mib.h

@@ -181,13 +181,26 @@ static inline int hif_set_association_mode(struct wfx_vif *wvif,
 }
 
 static inline int hif_set_tx_rate_retry_policy(struct wfx_vif *wvif,
-					       struct hif_mib_set_tx_rate_retry_policy *arg)
+					       int policy_index, uint8_t *rates)
 {
-	size_t size = struct_size(arg, tx_rate_retry_policy,
-				  arg->num_tx_rate_policies);
+	struct hif_mib_set_tx_rate_retry_policy *arg;
+	size_t size = struct_size(arg, tx_rate_retry_policy, 1);
+	int ret;
 
-	return hif_write_mib(wvif->wdev, wvif->id,
+	arg = kzalloc(size, GFP_KERNEL);
+	arg->num_tx_rate_policies = 1;
+	arg->tx_rate_retry_policy[0].policy_index = policy_index;
+	arg->tx_rate_retry_policy[0].short_retry_count = 255;
+	arg->tx_rate_retry_policy[0].long_retry_count = 255;
+	arg->tx_rate_retry_policy[0].first_rate_sel = 1;
+	arg->tx_rate_retry_policy[0].terminate = 1;
+	arg->tx_rate_retry_policy[0].count_init = 1;
+	memcpy(&arg->tx_rate_retry_policy[0].rates, rates,
+	       sizeof(arg->tx_rate_retry_policy[0].rates));
+	ret = hif_write_mib(wvif->wdev, wvif->id,
 			    HIF_MIB_ID_SET_TX_RATE_RETRY_POLICY, arg, size);
+	kfree(arg);
+	return ret;
 }
 
 static inline int hif_set_mac_addr_condition(struct wfx_vif *wvif,

drivers/staging/wfx/sta.c

@@ -19,7 +19,7 @@
 
 #define HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES 2
 
-static u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates)
+u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates)
 {
 	int i;
 	u32 ret = 0;

drivers/staging/wfx/sta.h

@@ -92,5 +92,6 @@ void wfx_suspend_resume(struct wfx_vif *wvif,
 void wfx_cqm_bssloss_sm(struct wfx_vif *wvif, int init, int good, int bad);
 void wfx_update_filtering(struct wfx_vif *wvif);
 int wfx_fwd_probe_req(struct wfx_vif *wvif, bool enable);
+u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates);
 
 #endif /* WFX_STA_H */