Add a patch to fix re_initLibG15() to properly reset the internal state

This allows g15daemon to continue working after keyboard was replugged and after suspend or hibernate. LP: #1357556
2019-05-10 11:34:58 +02:00
1 parent ef8cd284b9
commit dfaff3b01b
@@ -0,0 +1,85 @@
+Description: fix re_initLibG15() to properly reset internal state.
+Author: Alexander Ponyatykh <lazyranma@gmail.com>
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/libusb/+bug/1357556
+Forwarded: no
+Last-Update: 2015-05-17
+===================================================================
+--- a/libg15.c
+++ b/libg15.c
+@@ -275,19 +275,36 @@
+     return keyboard_device;
+ }
+ 
+/* reset the keyboard, returning it to a known state */
+static int closeKeyboardDevice()
+{
+    int retval = G15_NO_ERROR;
+
+    enospc_slowdown = shared_device = g15_keys_endpoint = g15_lcd_endpoint = 0;
+    found_devicetype = -1;
+
+    if (keyboard_device){
+#ifndef SUN_LIBUSB
+        retval = usb_release_interface (keyboard_device, 0);
+        usleep(50*1000);
+#endif
+#if 0
+        retval = usb_reset(keyboard_device);
+        usleep(50*1000);
+#endif
+        usb_close(keyboard_device);
+        keyboard_device=0;
+        return retval;
+    }
+    return -1;
+}
+ 
+ int re_initLibG15()
+ {
+    closeKeyboardDevice();
+ 
+-    usb_init();
+-
+-  /**
+-     *  usb_find_busses and usb_find_devices both report the number of devices
+-     *  / busses added / removed since the last call. since this is the first
+-   *  call we have to return values != 0 or else we didnt find anything */
+-     
+-    if (!usb_find_devices())
+-        return G15_ERROR_OPENING_USB_DEVICE;
+    usb_find_busses();
+    usb_find_devices();
+   
+     keyboard_device = findAndOpenG15();
+     if (!keyboard_device)
+@@ -319,28 +336,12 @@
+     return retval;
+ }
+ 
+-/* reset the keyboard, returning it to a known state */
+ int exitLibG15()
+ {
+-    int retval = G15_NO_ERROR;
+-    if (keyboard_device){
+-#ifndef SUN_LIBUSB
+-        retval = usb_release_interface (keyboard_device, 0);
+-        usleep(50*1000);
+-#endif
+-#if 0
+-        retval = usb_reset(keyboard_device);
+-        usleep(50*1000);
+-#endif
+-        usb_close(keyboard_device);
+-        keyboard_device=0;
+-        pthread_mutex_destroy(&libusb_mutex);
+-        return retval;
+-    }
+-    return -1;
+    pthread_mutex_destroy(&libusb_mutex);
+    return closeKeyboardDevice();
+ }
+ 
+-
+ static void dumpPixmapIntoLCDFormat(unsigned char *lcd_buffer, unsigned char const *data)
+ {
+ /*