qcacmn: Log runtime PM resume source

It is very critical to know the source of who requests runtime
PM resume to debug all kinds of runtime PM related issues. Hence
log them accordingly.

Change-Id: I9551830b1cb567fd29e9d9bbec18705f9cc5e9ec
CRs-fixed: 2496481

hif/src/pcie/if_pci.c

@@ -3870,10 +3870,19 @@ void hif_pci_irq_disable(struct hif_softc *scn, int ce_id)
 int hif_pm_runtime_request_resume(struct hif_opaque_softc *hif_ctx)
 {
 	struct hif_pci_softc *sc = HIF_GET_PCI_SOFTC(hif_ctx);
+	int pm_state;
 
 	if (!sc)
 		return -EINVAL;
 
+	pm_state = qdf_atomic_read(&sc->pm_state);
+	if (pm_state == HIF_PM_RUNTIME_STATE_SUSPENDED)
+		HIF_INFO("Runtime PM resume is requested by %ps",
+			 (void *)_RET_IP_);
+
+	sc->pm_stats.request_resume++;
+	sc->pm_stats.last_resume_caller = (void *)_RET_IP_;
+
 	return hif_pm_request_resume(sc->dev);
 }
 
@@ -3952,11 +3961,19 @@ int hif_pm_runtime_get(struct hif_opaque_softc *hif_ctx)
 		return ret;
 	}
 
+	if (pm_state == HIF_PM_RUNTIME_STATE_SUSPENDED) {
+		HIF_INFO("Runtime PM resume is requested by %ps",
+			 (void *)_RET_IP_);
+		ret = -EAGAIN;
+	} else {
+		ret = -EBUSY;
+	}
+
 	sc->pm_stats.request_resume++;
 	sc->pm_stats.last_resume_caller = (void *)_RET_IP_;
-	ret = hif_pm_request_resume(sc->dev);
+	hif_pm_request_resume(sc->dev);
 
-	return -EAGAIN;
+	return ret;
 }
 
 /**