qcacmn: Make napi rely on rx_pending flag

Use the rx_pending flag to determine if there is more work.
hif_napi_poll should not rely on the amount of work done
to determine if there is more work to do.

Change-Id: Ibf83cfb8f9aed6fdc3400b6a6945156283f56485
CRs-Fixed: 998319

hif/src/ce/ce_api.h

@@ -472,7 +472,7 @@ static inline void ce_pkt_error_count_incr(
 		+= 1;
 }
 
-bool ce_check_rx_pending(struct hif_softc *scn, int ce_id);
+bool ce_check_rx_pending(struct CE_state *CE_state);
 #if defined(FEATURE_LRO)
 void ce_lro_flush_cb_register(struct hif_opaque_softc *scn,
 	 void (handler)(void *), void *data);

hif/src/ce/ce_service.c

@@ -1982,14 +1982,13 @@ bool ce_get_rx_pending(struct hif_softc *scn)
 
 /**
  * ce_check_rx_pending() - ce_check_rx_pending
- * @scn: hif_softc
- * @ce_id: ce_id
+ * @CE_state: context of the copy engine to check
  *
- * Return: bool
+ * Return: true if there per_engine_service
+ *	didn't process all the rx descriptors.
  */
-bool ce_check_rx_pending(struct hif_softc *scn, int ce_id)
+bool ce_check_rx_pending(struct CE_state *CE_state)
 {
-	struct CE_state *CE_state = scn->ce_id_to_state[ce_id];
 	if (qdf_atomic_read(&CE_state->rx_pending))
 		return true;
 	else

hif/src/ce/ce_tasklet.c

@@ -204,7 +204,7 @@ static void ce_tasklet(unsigned long data)
 		CE_state->lro_flush_cb(CE_state->lro_data);
 	}
 
-	if (ce_check_rx_pending(scn, tasklet_entry->ce_id)) {
+	if (ce_check_rx_pending(CE_state)) {
 		/*
 		 * There are frames pending, schedule tasklet to process them.
 		 * Enable the interrupt only when there is no pending frames in

hif/src/hif_napi.c

@@ -428,7 +428,7 @@ int hif_napi_poll(struct hif_opaque_softc *hif_ctx, struct napi_struct *napi,
 	int    cpu = smp_processor_id();
 	struct hif_softc      *hif = HIF_GET_SOFTC(hif_ctx);
 	struct qca_napi_info *napi_info;
-	struct CE_state *ce_state;
+	struct CE_state *ce_state = NULL;
 
 	NAPI_DEBUG("%s -->(.., budget=%d)", budget);
 
@@ -466,7 +466,7 @@ int hif_napi_poll(struct hif_opaque_softc *hif_ctx, struct napi_struct *napi,
 		NAPI_DEBUG("%s:%d: nothing processed by CE. Completing NAPI",
 			   __func__, __LINE__);
 
-	if (rc <= HIF_NAPI_MAX_RECEIVES) {
+	if ((ce_state != NULL && !ce_check_rx_pending(ce_state)) || 0 == rc) {
 		napi_info->stats[cpu].napi_completes++;
 		/* enable interrupts */
 		napi_complete(napi);