distribution/packages/games/emulators/primehack/patches/wayland/001-padorder.patch

diff --git a/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp b/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
index 6df37b4..64ade4a 100644
--- a/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
@@ -392,6 +392,65 @@ void Init()
   StartHotplugThread();
 }
 
+struct joypad_udev_entry
+{
+   const char *devnode;
+   struct udev_device *dev;
+};
+
+int isNumber(const char *s) {
+  int n;
+
+  if(strlen(s) == 0) {
+    return 0;
+  }
+
+  for(n=0; n<strlen(s); n++) {
+    if(!(s[n] == '0' || s[n] == '1' || s[n] == '2' || s[n] == '3' || s[n] == '4' ||
+	 s[n] == '5' || s[n] == '6' || s[n] == '7' || s[n] == '8' || s[n] == '9'))
+      return 0;
+  }
+  return 1;
+}
+
+// compare /dev/input/eventX and /dev/input/eventY where X and Y are numbers
+int strcmp_events(const char* x, const char* y) {
+
+  // find a common string
+  int n, common, is_number;
+  int a, b;
+
+  n=0;
+  while(x[n] == y[n] && x[n] != '\0' && y[n] != '\0') {
+    n++;
+  }
+  common = n;
+
+  // check if remaining string is a number
+  is_number = 1;
+  if(isNumber(x+common) == 0) is_number = 0;
+  if(isNumber(y+common) == 0) is_number = 0;
+
+  if(is_number == 1) {
+    a = atoi(x+common);
+    b = atoi(y+common);
+
+    if(a == b) return  0;
+    if(a < b)  return -1;
+    return 1;
+  } else {
+    return strcmp(x, y);
+  }
+}
+
+/* Used for sorting devnodes to appear in the correct order */
+static int sort_devnodes(const void *a, const void *b)
+{
+  const struct joypad_udev_entry *aa = (const struct joypad_udev_entry *) a;
+  const struct joypad_udev_entry *bb = (const struct joypad_udev_entry *) b;
+   return strcmp_events(aa->devnode, bb->devnode);
+}
+
 // Only call this when ControllerInterface::m_devices_population_mutex is locked
 void PopulateDevices()
 {
@@ -404,6 +463,10 @@ void PopulateDevices()
   // We use udev to iterate over all /dev/input/event* devices.
   // Note: the Linux kernel is currently limited to just 32 event devices. If
   // this ever changes, hopefully udev will take care of this.
+  unsigned sorted_count = 0;
+  struct joypad_udev_entry sorted[64];
+  const char* devnode;
+  int i;
 
   udev* const udev = udev_new();
   ASSERT_MSG(CONTROLLERINTERFACE, udev != nullptr, "Couldn't initialize libudev.");
@@ -422,11 +485,25 @@ void PopulateDevices()
 
     udev_device* dev = udev_device_new_from_syspath(udev, path);
 
-    if (const char* devnode = udev_device_get_devnode(dev))
-      AddDeviceNode(devnode);
-
-    udev_device_unref(dev);
+    devnode = udev_device_get_devnode(dev);
+    if (devnode != NULL && sorted_count < 64) {
+      sorted[sorted_count].devnode = devnode;
+      sorted[sorted_count].dev     = dev;
+      sorted_count++;
+    } else {
+      udev_device_unref(dev);
+    }
   }
+
+  /* Sort the udev entries by devnode name so that they are
+   * created in the proper order */
+   qsort(sorted, sorted_count, sizeof(struct joypad_udev_entry), sort_devnodes);
+
+   for (i = 0; i < sorted_count; i++) {
+     AddDeviceNode(sorted[i].devnode);
+     udev_device_unref(sorted[i].dev);
+   }
+
   udev_enumerate_unref(enumerate);
   udev_unref(udev);
 }