msm: ipa3: add change to check log_type_mask defined or not

Adding a change to check whether log_type_mask is defined or
not to avoid allocating unknown memory size and to avoid out
of bound access.

Change-Id: I901863ee68f8c77424c4d4d3bb5f3a380a61dbee

drivers/platform/msm/ipa/ipa_v3/ipa_stats.c

@@ -138,6 +138,11 @@ static int ipa_get_generic_stats(unsigned long arg)
 	struct holb_discard_stats *holb_disc_stats_ptr;
 	struct holb_monitor_stats *holb_mon_stats_ptr;
 
+	if(ipa_lnx_agent_ctx.log_type_mask == 0) {
+		IPA_STATS_ERR("log_type_mask is not defined");
+		return -EPERM;
+	}
+
 	alloc_size = sizeof(struct ipa_lnx_generic_stats) +
 		(sizeof(struct holb_discard_stats) *
 			ipa_lnx_agent_ctx.alloc_info.num_holb_drop_stats_clients) +
@@ -297,6 +302,11 @@ static int ipa_get_clock_stats(unsigned long arg)
 	int alloc_size;
 	struct pm_client_stats *pm_stats_ptr;
 
+	if(ipa_lnx_agent_ctx.log_type_mask == 0) {
+		IPA_STATS_ERR("log_type_mask is not defined");
+		return -EPERM;
+	}
+
 	alloc_size = sizeof(struct ipa_lnx_clock_stats) +
 		(sizeof(struct pm_client_stats) *
 		ipa_lnx_agent_ctx.alloc_info.num_pm_clients);
@@ -609,6 +619,11 @@ static int ipa_get_wlan_inst_stats(unsigned long arg)
 	struct wlan_instance_info *instance_ptr = NULL;
 	struct ipa_uc_dbg_ring_stats stats;
 
+	if(ipa_lnx_agent_ctx.log_type_mask == 0) {
+		IPA_STATS_ERR("log_type_mask is not defined");
+		return -EPERM;
+	}
+
 	alloc_size = sizeof(struct ipa_lnx_wlan_inst_stats) +
 			(ipa_lnx_agent_ctx.alloc_info.num_wlan_instances *
 			sizeof(struct wlan_instance_info));
@@ -789,6 +804,11 @@ static int ipa_get_eth_inst_stats(unsigned long arg)
 	struct eth_instance_info *instance_ptr = NULL;
 	struct ipa_uc_dbg_ring_stats stats;
 
+	if(ipa_lnx_agent_ctx.log_type_mask == 0) {
+		IPA_STATS_ERR("log_type_mask is not defined");
+		return -EPERM;
+	}
+
 	alloc_size = sizeof(struct ipa_lnx_eth_inst_stats) +
 			(ipa_lnx_agent_ctx.alloc_info.num_eth_instances *
 				sizeof(struct eth_instance_info));
@@ -1096,6 +1116,11 @@ static int ipa_get_usb_inst_stats(unsigned long arg)
 	struct usb_instance_info *instance_ptr = NULL;
 	struct ipa_uc_dbg_ring_stats stats;
 
+	if(ipa_lnx_agent_ctx.log_type_mask == 0) {
+		IPA_STATS_ERR("log_type_mask is not defined");
+		return -EPERM;
+	}
+
 	alloc_size = sizeof(struct ipa_lnx_usb_inst_stats) +
 			(ipa_lnx_agent_ctx.alloc_info.num_usb_instances *
 				sizeof(struct usb_instance_info));
@@ -1271,6 +1296,11 @@ static int ipa_get_mhip_inst_stats(unsigned long arg)
 	struct mhip_instance_info *instance_ptr = NULL;
 	struct ipa_uc_dbg_ring_stats stats;
 
+	if(ipa_lnx_agent_ctx.log_type_mask == 0) {
+		IPA_STATS_ERR("log_type_mask is not defined");
+		return -EPERM;
+	}
+
 	alloc_size = sizeof(struct ipa_lnx_mhip_inst_stats) +
 			(ipa_lnx_agent_ctx.alloc_info.num_mhip_instances *
 				sizeof(struct mhip_instance_info));