qcacld-3.0: Remove dp_protect_entry_count atomic variable

The following patch removed the use of hdd_wait_for_dp_tx():
    qcacld-3.0: Update HDD to use DP component APIs
    Change-Id I377aecc4343e75dd17d279a2eb84fc49e737e784

Since the function is obsolete, remove it.

Note that this removes the only code that depends upon the
dp_protect_entry_count atomic variable, which means that is also
obsolete, as are the hdd_dp_ssr_protect() and hdd_dp_ssr_unprotect()
functions that increment and decrement it.

Change-Id: I02621dabf2e67a39259c4a51a604312f1927f72d
CRs-Fixed: 3424826

core/hdd/inc/wlan_hdd_main.h

@@ -124,7 +124,6 @@
  * Preprocessor definitions and constants
  */
 
-static qdf_atomic_t dp_protect_entry_count;
 /* Milli seconds to delay SSR thread when an packet is getting processed */
 #define SSR_WAIT_SLEEP_TIME 200
 /* MAX iteration count to wait for dp tx to complete */
@@ -4816,25 +4815,6 @@ QDF_STATUS hdd_stop_adapter_ext(struct hdd_context *hdd_ctx,
  */
 void hdd_check_for_net_dev_ref_leak(struct hdd_adapter *adapter);
 
-/**
- * hdd_wait_for_dp_tx: Wait for packet tx to complete
- *
- * This function waits for dp packet tx to complete
- *
- * Return: None
- */
-void hdd_wait_for_dp_tx(void);
-
-static inline void hdd_dp_ssr_protect(void)
-{
-	qdf_atomic_inc_return(&dp_protect_entry_count);
-}
-
-static inline void hdd_dp_ssr_unprotect(void)
-{
-	qdf_atomic_dec(&dp_protect_entry_count);
-}
-
 #ifdef WLAN_FEATURE_DYNAMIC_MAC_ADDR_UPDATE
 /**
  * hdd_dynamic_mac_address_set(): API to set MAC address, when interface

core/hdd/src/wlan_hdd_main.c

@@ -20094,32 +20094,6 @@ out:
 	return ret;
 }
 
-void hdd_wait_for_dp_tx(void)
-{
-	int count = MAX_SSR_WAIT_ITERATIONS;
-	int r;
-
-	hdd_enter();
-
-	while (count) {
-		r = atomic_read(&dp_protect_entry_count);
-
-		if (!r)
-			break;
-
-		if (--count) {
-			hdd_err_rl("Waiting for Packet tx to complete: %d",
-				   count);
-			msleep(SSR_WAIT_SLEEP_TIME);
-		}
-	}
-
-	if (!count)
-		hdd_err("Timed-out waiting for packet tx");
-
-	hdd_exit();
-}
-
 static const struct kernel_param_ops pcie_gen_speed_ops = {
 	.set = pcie_set_gen_speed_handler,
 	.get = param_get_int,

core/hdd/src/wlan_hdd_softap_tx_rx.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2012-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -224,12 +224,8 @@ static void __hdd_softap_hard_start_xmit(struct sk_buff *skb,
 netdev_tx_t hdd_softap_hard_start_xmit(struct sk_buff *skb,
 				       struct net_device *net_dev)
 {
-	hdd_dp_ssr_protect();
-
 	__hdd_softap_hard_start_xmit(skb, net_dev);
 
-	hdd_dp_ssr_unprotect();
-
 	return NETDEV_TX_OK;
 }
 

core/hdd/src/wlan_hdd_tx_rx.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2012-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -626,12 +626,8 @@ static void __hdd_hard_start_xmit(struct sk_buff *skb,
  */
 netdev_tx_t hdd_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
 {
-	hdd_dp_ssr_protect();
-
 	__hdd_hard_start_xmit(skb, net_dev);
 
-	hdd_dp_ssr_unprotect();
-
 	return NETDEV_TX_OK;
 }
 

core/hdd/src/wlan_hdd_wmm.c

@@ -2229,9 +2229,8 @@ uint16_t hdd_wmm_select_queue(struct net_device *dev,
 {
 	uint16_t q_index;
 
-	hdd_dp_ssr_protect();
 	q_index = __hdd_wmm_select_queue(dev, skb);
-	hdd_dp_ssr_unprotect();
+
 	return q_index;
 }