mt76: remove mcu_msg_alloc

We almost always use patter like this:

       skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
       return mt76_mcu_send_msg(dev, skb, CMD_FUN_SET_OP, wait_resp);

This is not needed, we can allocate skb in mcu_send_msg routine.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -135,9 +135,8 @@ struct mt76_queue {
 };
 
 struct mt76_mcu_ops {
-	struct sk_buff *(*mcu_msg_alloc)(const void *data, int len);
-	int (*mcu_send_msg)(struct mt76_dev *dev, struct sk_buff *skb,
-			    int cmd, bool wait_resp);
+	int (*mcu_send_msg)(struct mt76_dev *dev, int cmd, const void *data,
+			    int len, bool wait_resp);
 	int (*mcu_wr_rp)(struct mt76_dev *dev, u32 base,
 			 const struct mt76_reg_pair *rp, int len);
 	int (*mcu_rd_rp)(struct mt76_dev *dev, u32 base,
@@ -503,7 +502,6 @@ struct mt76_rx_status {
 #define mt76_wr_rp(dev, ...)	(dev)->mt76.bus->wr_rp(&((dev)->mt76), __VA_ARGS__)
 #define mt76_rd_rp(dev, ...)	(dev)->mt76.bus->rd_rp(&((dev)->mt76), __VA_ARGS__)
 
-#define mt76_mcu_msg_alloc(dev, ...)	(dev)->mt76.mcu_ops->mcu_msg_alloc(__VA_ARGS__)
 #define mt76_mcu_send_msg(dev, ...)	(dev)->mt76.mcu_ops->mcu_send_msg(&((dev)->mt76), __VA_ARGS__)
 
 #define mt76_set(dev, offset, val)	mt76_rmw(dev, offset, 0, val)

drivers/net/wireless/mediatek/mt76/mt76x0/pci_mcu.c

@@ -127,7 +127,6 @@ static int mt76x0e_load_firmware(struct mt76x02_dev *dev)
 int mt76x0e_mcu_init(struct mt76x02_dev *dev)
 {
 	static const struct mt76_mcu_ops mt76x0e_mcu_ops = {
-		.mcu_msg_alloc = mt76x02_mcu_msg_alloc,
 		.mcu_send_msg = mt76x02_mcu_msg_send,
 	};
 	int err;

drivers/net/wireless/mediatek/mt76/mt76x02_mcu.c

@@ -21,7 +21,7 @@
 
 #include "mt76x02_mcu.h"
 
-struct sk_buff *mt76x02_mcu_msg_alloc(const void *data, int len)
+static struct sk_buff *mt76x02_mcu_msg_alloc(const void *data, int len)
 {
 	struct sk_buff *skb;
 
@@ -32,7 +32,6 @@ struct sk_buff *mt76x02_mcu_msg_alloc(const void *data, int len)
 
 	return skb;
 }
-EXPORT_SYMBOL_GPL(mt76x02_mcu_msg_alloc);
 
 static struct sk_buff *
 mt76x02_mcu_get_response(struct mt76x02_dev *dev, unsigned long expires)
@@ -80,16 +79,18 @@ mt76x02_tx_queue_mcu(struct mt76x02_dev *dev, enum mt76_txq_id qid,
 	return 0;
 }
 
-int mt76x02_mcu_msg_send(struct mt76_dev *mdev, struct sk_buff *skb,
-			 int cmd, bool wait_resp)
+int mt76x02_mcu_msg_send(struct mt76_dev *mdev, int cmd, const void *data,
+			 int len, bool wait_resp)
 {
 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 	unsigned long expires = jiffies + HZ;
+	struct sk_buff *skb;
 	int ret;
 	u8 seq;
 
+	skb = mt76x02_mcu_msg_alloc(data, len);
 	if (!skb)
-		return -EINVAL;
+		return -ENOMEM;
 
 	mutex_lock(&mdev->mmio.mcu.mutex);
 
@@ -135,7 +136,6 @@ int mt76x02_mcu_function_select(struct mt76x02_dev *dev,
 				enum mcu_function func,
 				u32 val, bool wait_resp)
 {
-	struct sk_buff *skb;
 	struct {
 	    __le32 id;
 	    __le32 value;
@@ -144,15 +144,14 @@ int mt76x02_mcu_function_select(struct mt76x02_dev *dev,
 	    .value = cpu_to_le32(val),
 	};
 
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	return mt76_mcu_send_msg(dev, skb, CMD_FUN_SET_OP, wait_resp);
+	return mt76_mcu_send_msg(dev, CMD_FUN_SET_OP, &msg, sizeof(msg),
+				 wait_resp);
 }
 EXPORT_SYMBOL_GPL(mt76x02_mcu_function_select);
 
 int mt76x02_mcu_set_radio_state(struct mt76x02_dev *dev, bool on,
 				bool wait_resp)
 {
-	struct sk_buff *skb;
 	struct {
 		__le32 mode;
 		__le32 level;
@@ -161,15 +160,14 @@ int mt76x02_mcu_set_radio_state(struct mt76x02_dev *dev, bool on,
 		.level = cpu_to_le32(0),
 	};
 
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	return mt76_mcu_send_msg(dev, skb, CMD_POWER_SAVING_OP, wait_resp);
+	return mt76_mcu_send_msg(dev, CMD_POWER_SAVING_OP, &msg, sizeof(msg),
+				 wait_resp);
 }
 EXPORT_SYMBOL_GPL(mt76x02_mcu_set_radio_state);
 
 int mt76x02_mcu_calibrate(struct mt76x02_dev *dev, int type,
 			  u32 param, bool wait)
 {
-	struct sk_buff *skb;
 	struct {
 		__le32 id;
 		__le32 value;
@@ -182,8 +180,8 @@ int mt76x02_mcu_calibrate(struct mt76x02_dev *dev, int type,
 	if (wait)
 		mt76_rmw(dev, MT_MCU_COM_REG0, BIT(31), 0);
 
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	ret = mt76_mcu_send_msg(dev, skb, CMD_CALIBRATION_OP, true);
+	ret = mt76_mcu_send_msg(dev, CMD_CALIBRATION_OP, &msg, sizeof(msg),
+				true);
 	if (ret)
 		return ret;
 

drivers/net/wireless/mediatek/mt76/mt76x02_mcu.h

@@ -99,9 +99,8 @@ struct mt76x02_patch_header {
 int mt76x02_mcu_cleanup(struct mt76x02_dev *dev);
 int mt76x02_mcu_calibrate(struct mt76x02_dev *dev, int type,
 			  u32 param, bool wait);
-struct sk_buff *mt76x02_mcu_msg_alloc(const void *data, int len);
-int mt76x02_mcu_msg_send(struct mt76_dev *mdev, struct sk_buff *skb,
-			 int cmd, bool wait_resp);
+int mt76x02_mcu_msg_send(struct mt76_dev *mdev, int cmd, const void *data,
+			 int len, bool wait_resp);
 int mt76x02_mcu_function_select(struct mt76x02_dev *dev,
 				enum mcu_function func,
 				u32 val, bool wait_resp);

drivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c

@@ -129,9 +129,6 @@ __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
 	u8 seq = 0;
 	u32 info;
 
-	if (!skb)
-		return -EINVAL;
-
 	if (test_bit(MT76_REMOVED, &dev->state))
 		return 0;
 
@@ -162,12 +159,17 @@ __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
 }
 
 static int
-mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
-		      int cmd, bool wait_resp)
+mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data,
+		      int len, bool wait_resp)
 {
 	struct mt76_usb *usb = &dev->usb;
+	struct sk_buff *skb;
 	int err;
 
+	skb = mt76x02u_mcu_msg_alloc(data, len);
+	if (!skb)
+		return -ENOMEM;
+
 	mutex_lock(&usb->mcu.mutex);
 	err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp);
 	mutex_unlock(&usb->mcu.mutex);
@@ -186,6 +188,7 @@ mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base,
 {
 	const int CMD_RANDOM_WRITE = 12;
 	const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
+	struct mt76_usb *usb = &dev->usb;
 	struct sk_buff *skb;
 	int cnt, i, ret;
 
@@ -204,7 +207,9 @@ mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base,
 		skb_put_le32(skb, data[i].value);
 	}
 
-	ret = mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n);
+	mutex_lock(&usb->mcu.mutex);
+	ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n);
+	mutex_unlock(&usb->mcu.mutex);
 	if (ret)
 		return ret;
 
@@ -345,7 +350,6 @@ EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data);
 void mt76x02u_init_mcu(struct mt76_dev *dev)
 {
 	static const struct mt76_mcu_ops mt76x02u_mcu_ops = {
-		.mcu_msg_alloc = mt76x02u_mcu_msg_alloc,
 		.mcu_send_msg = mt76x02u_mcu_send_msg,
 		.mcu_wr_rp = mt76x02u_mcu_wr_rp,
 		.mcu_rd_rp = mt76x02u_mcu_rd_rp,

drivers/net/wireless/mediatek/mt76/mt76x2/mcu.c

@@ -26,7 +26,6 @@
 int mt76x2_mcu_set_channel(struct mt76x02_dev *dev, u8 channel, u8 bw,
 			   u8 bw_index, bool scan)
 {
-	struct sk_buff *skb;
 	struct {
 		u8 idx;
 		u8 scan;
@@ -45,21 +44,19 @@ int mt76x2_mcu_set_channel(struct mt76x02_dev *dev, u8 channel, u8 bw,
 	};
 
 	/* first set the channel without the extension channel info */
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	mt76_mcu_send_msg(dev, skb, CMD_SWITCH_CHANNEL_OP, true);
+	mt76_mcu_send_msg(dev, CMD_SWITCH_CHANNEL_OP, &msg, sizeof(msg), true);
 
 	usleep_range(5000, 10000);
 
 	msg.ext_chan = 0xe0 + bw_index;
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	return mt76_mcu_send_msg(dev, skb, CMD_SWITCH_CHANNEL_OP, true);
+	return mt76_mcu_send_msg(dev, CMD_SWITCH_CHANNEL_OP, &msg, sizeof(msg),
+				 true);
 }
 EXPORT_SYMBOL_GPL(mt76x2_mcu_set_channel);
 
 int mt76x2_mcu_load_cr(struct mt76x02_dev *dev, u8 type, u8 temp_level,
 		       u8 channel)
 {
-	struct sk_buff *skb;
 	struct {
 		u8 cr_mode;
 		u8 temp;
@@ -80,15 +77,13 @@ int mt76x2_mcu_load_cr(struct mt76x02_dev *dev, u8 type, u8 temp_level,
 	msg.cfg = cpu_to_le32(val);
 
 	/* first set the channel without the extension channel info */
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	return mt76_mcu_send_msg(dev, skb, CMD_LOAD_CR, true);
+	return mt76_mcu_send_msg(dev, CMD_LOAD_CR, &msg, sizeof(msg), true);
 }
 EXPORT_SYMBOL_GPL(mt76x2_mcu_load_cr);
 
 int mt76x2_mcu_init_gain(struct mt76x02_dev *dev, u8 channel, u32 gain,
 			 bool force)
 {
-	struct sk_buff *skb;
 	struct {
 		__le32 channel;
 		__le32 gain_val;
@@ -100,15 +95,14 @@ int mt76x2_mcu_init_gain(struct mt76x02_dev *dev, u8 channel, u32 gain,
 	if (force)
 		msg.channel |= cpu_to_le32(BIT(31));
 
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	return mt76_mcu_send_msg(dev, skb, CMD_INIT_GAIN_OP, true);
+	return mt76_mcu_send_msg(dev, CMD_INIT_GAIN_OP, &msg, sizeof(msg),
+				 true);
 }
 EXPORT_SYMBOL_GPL(mt76x2_mcu_init_gain);
 
 int mt76x2_mcu_tssi_comp(struct mt76x02_dev *dev,
 			 struct mt76x2_tssi_comp *tssi_data)
 {
-	struct sk_buff *skb;
 	struct {
 		__le32 id;
 		struct mt76x2_tssi_comp data;
@@ -117,7 +111,7 @@ int mt76x2_mcu_tssi_comp(struct mt76x02_dev *dev,
 		.data = *tssi_data,
 	};
 
-	skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
-	return mt76_mcu_send_msg(dev, skb, CMD_CALIBRATION_OP, true);
+	return mt76_mcu_send_msg(dev, CMD_CALIBRATION_OP, &msg, sizeof(msg),
+				 true);
 }
 EXPORT_SYMBOL_GPL(mt76x2_mcu_tssi_comp);

drivers/net/wireless/mediatek/mt76/mt76x2/pci_mcu.c

@@ -168,7 +168,6 @@ mt76pci_load_firmware(struct mt76x02_dev *dev)
 int mt76x2_mcu_init(struct mt76x02_dev *dev)
 {
 	static const struct mt76_mcu_ops mt76x2_mcu_ops = {
-		.mcu_msg_alloc = mt76x02_mcu_msg_alloc,
 		.mcu_send_msg = mt76x02_mcu_msg_send,
 	};
 	int ret;