From 7db2e2537fad292edcf18bca6d2301d0661996be Mon Sep 17 00:00:00 2001
From: Nekotekina <nekotekina@gmail.com>
Date: Sun, 18 Aug 2019 16:29:02 +0300
Subject: [PATCH] Don't call lv2_obj::awake_all with empty list

Fixup after #5883
---
 rpcs3/Emu/Cell/lv2/sys_event.cpp      |  5 ++++-
 rpcs3/Emu/Cell/lv2/sys_event_flag.cpp | 12 +++++++++---
 rpcs3/Emu/Cell/lv2/sys_net.cpp        |  5 ++++-
 rpcs3/Emu/Cell/lv2/sys_semaphore.cpp  |  9 +++++++--
 4 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/rpcs3/Emu/Cell/lv2/sys_event.cpp b/rpcs3/Emu/Cell/lv2/sys_event.cpp
index cd2cb3f8ad..afc7fda33d 100644
--- a/rpcs3/Emu/Cell/lv2/sys_event.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_event.cpp
@@ -179,7 +179,10 @@ error_code sys_event_queue_destroy(ppu_thread& ppu, u32 equeue_id, s32 mode)
 				queue->append(cpu);
 			}
 
-			lv2_obj::awake_all();
+			if (!queue->sq.empty())
+			{
+				lv2_obj::awake_all();
+			}
 		}
 		else
 		{
diff --git a/rpcs3/Emu/Cell/lv2/sys_event_flag.cpp b/rpcs3/Emu/Cell/lv2/sys_event_flag.cpp
index 678dbaa588..ec6232fb81 100644
--- a/rpcs3/Emu/Cell/lv2/sys_event_flag.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_event_flag.cpp
@@ -317,8 +317,11 @@ error_code sys_event_flag_set(u32 id, u64 bitptn)
 			return false;
 		});
 
-		flag->sq.erase(tail, flag->sq.end());
-		lv2_obj::awake_all();
+		if (tail != flag->sq.end())
+		{
+			flag->sq.erase(tail, flag->sq.end());
+			lv2_obj::awake_all();
+		}
 	}
 
 	return CELL_OK;
@@ -380,7 +383,10 @@ error_code sys_event_flag_cancel(ppu_thread& ppu, u32 id, vm::ptr<u32> num)
 			flag->append(thread);
 		}
 
-		lv2_obj::awake_all();
+		if (value)
+		{
+			lv2_obj::awake_all();
+		}
 	}
 
 	if (ppu.test_stopped())
diff --git a/rpcs3/Emu/Cell/lv2/sys_net.cpp b/rpcs3/Emu/Cell/lv2/sys_net.cpp
index 13ef3cd972..8c91b70b8a 100644
--- a/rpcs3/Emu/Cell/lv2/sys_net.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_net.cpp
@@ -206,7 +206,10 @@ extern void network_thread_init()
 				lv2_obj::append(ppu);
 			}
 
-			lv2_obj::awake_all();
+			if (!s_to_awake.empty())
+			{
+				lv2_obj::awake_all();
+			}
 
 			s_to_awake.clear();
 			socklist.clear();
diff --git a/rpcs3/Emu/Cell/lv2/sys_semaphore.cpp b/rpcs3/Emu/Cell/lv2/sys_semaphore.cpp
index ae02a96703..7e125d4b74 100644
--- a/rpcs3/Emu/Cell/lv2/sys_semaphore.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_semaphore.cpp
@@ -237,12 +237,17 @@ error_code sys_semaphore_post(ppu_thread& ppu, u32 sem_id, s32 count)
 		}
 
 		// Wake threads
-		for (s32 i = std::min<s32>(-std::min<s32>(val, 0), count); i > 0; i--)
+		const s32 to_awake = std::min<s32>(-std::min<s32>(val, 0), count);
+
+		for (s32 i = 0; i < to_awake; i++)
 		{
 			sem->append(verify(HERE, sem->schedule<ppu_thread>(sem->sq, sem->protocol)));
 		}
 
-		lv2_obj::awake_all();
+		if (to_awake > 0)
+		{
+			lv2_obj::awake_all();
+		}
 	}
 
 	return CELL_OK;