qcacld-3.0: Use max tx power allowed to compute link report power

Driver uses max tx power allowed for a particular channel to
calculate link report power and updates max tx power allowed with
calculated link report power. This can result in usage of
MIN_TX_PWR_CAP as max tx power if AP requests power below
MIN_TX_PWR_CAP in link request. Once max tx power reaches
MIN_TX_PWR_CAP, the driver will always use MIN_TX_PWR_CAP in
the link report which could be much less than power allowed for
a particular channel.

Use max tx power allowed for a particular channel always to
compute link report power to fix this issue.

Change-Id: I0060500f23e6131481baa00cd76f41419281e41a
CRs-Fixed: 2195960

core/mac/src/pe/include/lim_session.h

@@ -563,6 +563,7 @@ typedef struct sPESession       /* Added to Support BT-AMP */
 	bool deauth_disassoc_rc;
 	enum wmi_obss_color_collision_evt_type obss_color_collision_dec_evt;
 	bool is_session_obss_color_collision_det_enabled;
+	int8_t def_max_tx_pwr;
 } tPESession, *tpPESession;
 
 /*-------------------------------------------------------------------------

core/mac/src/pe/lim/lim_process_sme_req_messages.c

@@ -1607,6 +1607,7 @@ __lim_process_sme_join_req(tpAniSirGlobal mac_ctx, uint32_t *msg_buf)
 		session->maxTxPower = lim_get_max_tx_power(reg_max,
 					local_power_constraint,
 					mac_ctx->roam.configParam.nTxPowerCap);
+		session->def_max_tx_pwr = session->maxTxPower;
 
 		pe_debug("Reg max %d local power con %d max tx pwr %d",
 			reg_max, local_power_constraint, session->maxTxPower);

core/mac/src/pe/rrm/rrm_api.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
  *
  * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
  *
@@ -270,7 +270,7 @@ rrm_process_link_measurement_request(tpAniSirGlobal pMac,
 	}
 	pHdr = WMA_GET_RX_MAC_HEADER(pRxPacketInfo);
 
-	LinkReport.txPower = lim_get_max_tx_power(pSessionEntry->maxTxPower,
+	LinkReport.txPower = lim_get_max_tx_power(pSessionEntry->def_max_tx_pwr,
 						pLinkReq->MaxTxPower.maxTxPower,
 						  pMac->roam.configParam.
 						  nTxPowerCap);