qcacmn: Handle RTPM counter for opt wifi dp

Inorder to keep the PCIe link up during
optional wifi dp transfer the
hif_force_wake_request() is called during
filter addition. This increments the rtpm_get counter.
Now if Wifi is disconnected before releasing the
filters, the corresponding hif_force_wake_release()
call is not made. This causes a mismatch in RTPM GET and
PUT calls and triggers an assert during hdd_wlan_stop_modules().
This change adds a cleanup call to release the force wake
and reduce the rtpm_put counter to prevent the assert.

Change-Id: Idd778275a015922376cf7eb0a7c3d92e75881fe8
CRs-Fixed: 3441186

hif/src/hif_main.h

@@ -347,6 +347,9 @@ struct hif_softc {
 #endif /*defined(HIF_CONFIG_SLUB_DEBUG_ON) || defined(HIF_CE_DEBUG_DATA_BUF)*/
 #ifdef IPA_OFFLOAD
 	qdf_shared_mem_t *ipa_ce_ring;
+#endif
+#ifdef IPA_OPT_WIFI_DP
+	qdf_atomic_t opt_wifi_dp_rtpm_cnt;
 #endif
 	struct hif_cfg ini_cfg;
 #ifdef HIF_CE_LOG_INFO

hif/src/pcie/if_pci.c

@@ -4290,11 +4290,36 @@ void hif_allow_link_low_power_states(struct hif_opaque_softc *hif)
 #ifdef IPA_OPT_WIFI_DP
 int hif_prevent_l1(struct hif_opaque_softc *hif)
 {
-	return hif_force_wake_request(hif);
+	struct hif_softc *hif_softc = (struct hif_softc *)hif;
+	int status;
+
+	status = hif_force_wake_request(hif);
+	if (status) {
+		hif_err("Force wake request error");
+		return status;
+	}
+
+	qdf_atomic_inc(&hif_softc->opt_wifi_dp_rtpm_cnt);
+	hif_info("opt_dp: pcie link up count %d",
+		 qdf_atomic_read(&hif_softc->opt_wifi_dp_rtpm_cnt));
+	return status;
 }
 
 void hif_allow_l1(struct hif_opaque_softc *hif)
 {
-	hif_force_wake_release(hif);
+	struct hif_softc *hif_softc = (struct hif_softc *)hif;
+	int status;
+
+	if (qdf_atomic_read(&hif_softc->opt_wifi_dp_rtpm_cnt) > 0) {
+		status = hif_force_wake_release(hif);
+		if (status) {
+			hif_err("Force wake release error");
+			return;
+		}
+
+		qdf_atomic_dec(&hif_softc->opt_wifi_dp_rtpm_cnt);
+		hif_info("opt_dp: pcie link down count %d",
+			 qdf_atomic_read(&hif_softc->opt_wifi_dp_rtpm_cnt));
+	}
 }
 #endif