diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c
index e5a54d9..8558029 100644
--- a/openbsc/src/gprs/gprs_sgsn.c
+++ b/openbsc/src/gprs/gprs_sgsn.c
@@ -667,6 +667,44 @@
 	}
 }
 
+/*
+ * High-level function to be called for PDP deactivation initiated from SGSN VTY.
+ * When there are PDP contexts present for a MM context, PDP context will be
+ * deactivated along with GMM Detach(MM context deletion).
+ * If there are no PDP present, MM context will be deleted to avoid further
+ * PDP context activation for that MS.
+ */
+void drop_gmm_ctx_for_ms(const char *imsi)
+{
+	OSMO_ASSERT(imsi != NULL);
+	struct sgsn_mm_ctx *mm;
+	struct sgsn_pdp_ctx *pdp;
+
+	/* Search the MM context subscriber */
+	mm = sgsn_mm_ctx_by_imsi(imsi);
+	LOGMMCTXP(LOGL_INFO, mm,
+		"SGSN intiated Deactivate PDP request for %s\n", imsi);
+	if (mm) {
+		/* Search the PDP for this subscriber */
+		if (llist_empty(&mm->pdp_list)) {
+			/*
+			 * Deleting mm context for the subscriber when no PDP
+			 * context is present.
+			 */
+			gsm0408_gprs_access_cancelled(mm, GMM_CAUSE_GPRS_NOTALLOWED);
+			LOGMMCTXP(LOGL_NOTICE, mm, "No PDP context to deactivate\n");
+		} else {
+			llist_for_each_entry(pdp, &mm->pdp_list, list) {
+				gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_DEACT_REGULAR);
+				LOGPDPCTXP(LOGL_INFO, pdp, "PDP Deactivation "
+					"Successful\n");
+			}
+		}
+	} else
+		LOGMMCTXP(LOGL_NOTICE, mm,
+			"No MM context to deactivate for %s\n", imsi);
+}
+
 /* High-level function to be called in case a GGSN has disappeared or
  * otherwise lost state (recovery procedure) */
 int drop_all_pdp_for_ggsn(struct sgsn_ggsn_ctx *ggsn)