By popular request, and explicit method of telling which events

from a device belong together was implemented - input_sync() and
EV_SYN. Touches every input driver. The first to make use of it
is mousedev.c to properly merge events into PS/2 packets.

Documentation/input/input-programming.txt

@@ -23,6 +23,7 @@ pressed or released a BUTTON_IRQ happens. The driver could look like:
 static void button_interrupt(int irq, void *dummy, struct pt_regs *fp)
 {
 	input_report_key(&button_dev, BTN_1, inb(BUTTON_PORT) & 1);
+	input_sync(&button_dev);
 }
 
 static int __init button_init(void)
@@ -86,13 +87,22 @@ While in use, the only used function of the driver is
 which upon every interrupt from the button checks its state and reports it
 via the 
 
-	input_report_btn()
+	input_report_key()
 
 call to the input system. There is no need to check whether the interrupt
 routine isn't reporting two same value events (press, press for example) to
 the input system, because the input_report_* functions check that
 themselves.
 
+Then there is the
+
+	input_sync()
+
+call to tell those who receive the events that we've sent a complete report.
+This doesn't seem important in the one button case, but is quite important
+for for example mouse movement, where you don't want the X and Y values
+to be interpreted separately, because that'd result in a different movement.
+
 1.2 dev->open() and dev->close()
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

drivers/input/input.c

@@ -72,16 +72,9 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
 {
 	struct input_handle *handle = dev->handle;
 
-/*
- * Wake up the device if it is sleeping.
- */
 	if (dev->pm_dev)
 		pm_access(dev->pm_dev);
 
-/*
- * Filter non-events, and bad input values out.
- */
-
 	if (type > EV_MAX || !test_bit(type, dev->evbit))
 		return;
 
@@ -89,6 +82,19 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
 
 	switch (type) {
 
+		case EV_SYN:
+			switch (code) {
+				case SYN_CONFIG:
+					if (dev->event) dev->event(dev, type, code, value);
+					break;
+
+				case SYN_REPORT:
+					if (dev->sync) return;
+					dev->sync = 1;
+					break;
+			}
+			break;
+
 		case EV_KEY:
 
 			if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value)
@@ -185,9 +191,8 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
 			break;
 	}
 
-/*
- * Distribute the event to handler modules.
- */
+	if (type != EV_SYN) 
+		dev->sync = 0;
 
 	while (handle) {
 		if (handle->open)
@@ -200,6 +205,7 @@ static void input_repeat_key(unsigned long data)
 {
 	struct input_dev *dev = (void *) data;
 	input_event(dev, EV_KEY, dev->repeat_key, 2);
+	input_sync(dev);
 	mod_timer(&dev->timer, jiffies + dev->rep[REP_PERIOD]);
 }
 
@@ -438,6 +444,12 @@ void input_register_device(struct input_dev *dev)
 	struct input_handle *handle;
 	struct input_device_id *id;
 
+/*
+ * Add the EV_SYN capability.
+ */
+
+	set_bit(EV_SYN, dev->evbit);
+
 /*
  * Initialize repeat timer to default values.
  */

drivers/input/joystick/a3d.c

@@ -130,6 +130,8 @@ static void a3d_read(struct a3d *a3d, unsigned char *data)
 			input_report_key(dev, BTN_LEFT,   data[3] & 2);
 			input_report_key(dev, BTN_MIDDLE, data[3] & 4);
 
+			input_sync(dev);
+
 			a3d->axes[0] = ((signed char)((data[11] << 6) | (data[12] << 3) | (data[13]))) + 128;
 			a3d->axes[1] = ((signed char)((data[14] << 6) | (data[15] << 3) | (data[16]))) + 128;
 			a3d->axes[2] = ((signed char)((data[17] << 6) | (data[18] << 3) | (data[19]))) + 128;
@@ -165,6 +167,8 @@ static void a3d_read(struct a3d *a3d, unsigned char *data)
 			input_report_key(dev, BTN_TOP,     data[8] & 4);
 			input_report_key(dev, BTN_PINKIE,  data[7] & 1);
 
+			input_sync(dev);
+
 			return;
 	}
 }

drivers/input/joystick/adi.c

@@ -249,6 +249,8 @@ static int adi_decode(struct adi *adi)
 
 	for (i = 63; i < adi->buttons; i++)
 		input_report_key(dev, *key++, adi_get_bits(adi, 1));
+	
+	input_sync(dev);
 
 	return 0;
 }

drivers/input/joystick/amijoy.c

@@ -67,6 +67,8 @@ static void amijoy_interrupt(int irq, void *dummy, struct pt_regs *fp)
 			input_report_abs(amijoy_dev + i, ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
 			data = ~(data ^ (data << 1));
 			input_report_abs(amijoy_dev + i, ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
+
+			input_sync(amijoy_dev + i);
 		}
 }
 

drivers/input/joystick/analog.c

@@ -215,6 +215,8 @@ static void analog_decode(struct analog *analog, int *axes, int *initial, int bu
 			input_report_abs(dev, analog_hats[j++],
 				((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
 		}
+
+	input_sync(dev);
 }
 
 /*

drivers/input/joystick/cobra.c

@@ -136,6 +136,8 @@ static void cobra_timer(unsigned long private)
 			for (j = 0; cobra_btn[j]; j++)
 				input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));
 
+			input_sync(dev);
+
 		}
 
 	mod_timer(&cobra->timer, jiffies + COBRA_REFRESH_TIME);	

drivers/input/joystick/db9.c

@@ -266,6 +266,8 @@ static void db9_timer(unsigned long private)
 			break;
 		}
 
+	input_sync(dev);
+
 	mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
 }
 

drivers/input/joystick/gamecon.c

@@ -328,6 +328,8 @@ static void gc_timer(unsigned long private)
 
 				for (j = 0; j < 10; j++)
 					input_report_key(dev + i, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
+
+				input_sync(dev + i);
 			}
 		}
 	}
@@ -356,6 +358,8 @@ static void gc_timer(unsigned long private)
 			if (s & gc->pads[GC_SNES])
 				for (j = 0; j < 8; j++)
 					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
+
+			input_sync(dev + i);
 		}
 	}
 
@@ -379,6 +383,8 @@ static void gc_timer(unsigned long private)
 
 			if (s & gc->pads[GC_MULTI2])
 				input_report_key(dev + i, BTN_THUMB, s & data[5]);
+
+			input_sync(dev + i);
 		}
 	}
 
@@ -398,6 +404,7 @@ static void gc_timer(unsigned long private)
 
 				input_report_key(dev + i, BTN_THUMBL, ~data[0] & 0x04);
 				input_report_key(dev + i, BTN_THUMBR, ~data[0] & 0x02);
+				input_sync(dev + i);
 
 			case GC_PSX_NEGCON:
 			case GC_PSX_ANALOG:
@@ -414,6 +421,8 @@ static void gc_timer(unsigned long private)
 				input_report_key(dev + i, BTN_START,  ~data[0] & 0x08);
 				input_report_key(dev + i, BTN_SELECT, ~data[0] & 0x01);
 
+				input_sync(dev + i);
+
 				break;
 
 			case GC_PSX_NORMAL:
@@ -427,6 +436,8 @@ static void gc_timer(unsigned long private)
 				input_report_key(dev + i, BTN_START,  ~data[0] & 0x08);
 				input_report_key(dev + i, BTN_SELECT, ~data[0] & 0x01);
 
+				input_sync(dev + i);
+
 				break;
 		}
 	}

drivers/input/joystick/gf2k.c

@@ -197,6 +197,8 @@ static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
 
 	for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 		input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
+
+	input_sync(dev);
 }
 
 /*

drivers/input/joystick/grip.c

@@ -276,6 +276,8 @@ static void grip_timer(unsigned long private)
 
 
 		}
+
+		input_sync(dev);
 	}
 
 	mod_timer(&grip->timer, jiffies + GRIP_REFRESH_TIME);

drivers/input/joystick/grip_mp.c

@@ -515,6 +515,10 @@ static void report_slot(struct grip_mp *grip, int slot)
 	input_report_abs(dev, ABS_X, grip->xaxes[slot]);
 	input_report_abs(dev, ABS_Y, grip->yaxes[slot]);
 
+	/* Tell the receiver of the events to process them */
+
+	input_sync(dev);
+
 	grip->dirty[slot] = 0;
 }
 

drivers/input/joystick/guillemot.c

@@ -147,6 +147,8 @@ static void guillemot_timer(unsigned long private)
 			input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
 	}
 
+	input_sync(dev);
+
 	mod_timer(&guillemot->timer, jiffies + GUILLEMOT_REFRESH_TIME);
 }
 

drivers/input/joystick/iforce/iforce-packets.c

@@ -214,10 +214,13 @@ void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data)
 				}
 			}
 
+			input_sync(dev);
+
 			break;
 
 		case 0x02:	/* status report */
 			input_report_key(dev, BTN_DEAD, data[0] & 0x02);
+			input_sync(dev);
 
 			/* Check if an effect was just started or stopped */
 			i = data[1] & 0x7f;

drivers/input/joystick/interact.c

@@ -176,6 +176,8 @@ static void interact_timer(unsigned long private)
 		}
 	}
 
+	input_sync(dev);
+
 	mod_timer(&interact->timer, jiffies + INTERACT_REFRESH_TIME);
 
 }

drivers/input/joystick/magellan.c

@@ -107,6 +107,8 @@ static void magellan_process_packet(struct magellan* magellan)
 			for (i = 0; i < 9; i++) input_report_key(dev, magellan_buttons[i], (t >> i) & 1);
 			break;
 	}
+
+	input_sync(dev);
 }
 
 static void magellan_interrupt(struct serio *serio, unsigned char data, unsigned int flags)

drivers/input/joystick/sidewinder.c

@@ -323,6 +323,8 @@ static int sw_parse(unsigned char *buf, struct sw *sw)
 			input_report_key(dev, BTN_BASE4, !GB(38,1));
 			input_report_key(dev, BTN_BASE5, !GB(37,1));
 
+			input_sync(dev);
+
 			return 0;
 
 		case SW_ID_GP:
@@ -336,6 +338,8 @@ static int sw_parse(unsigned char *buf, struct sw *sw)
 
 				for (j = 0; j < 10; j++)
 					input_report_key(dev + i, sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1));
+
+				input_sync(dev + i);
 			}
 
 			return 0;
@@ -356,6 +360,8 @@ static int sw_parse(unsigned char *buf, struct sw *sw)
 			for (j = 0; j < 9; j++)
 				input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1));
 
+			input_sync(dev);
+
 			return 0;
 
 		case SW_ID_FSP:
@@ -377,6 +383,8 @@ static int sw_parse(unsigned char *buf, struct sw *sw)
 			input_report_key(dev, BTN_MODE,   GB(38,1));
 			input_report_key(dev, BTN_SELECT, GB(39,1));
 
+			input_sync(dev);
+
 			return 0;
 
 		case SW_ID_FFW:
@@ -390,6 +398,8 @@ static int sw_parse(unsigned char *buf, struct sw *sw)
 			for (j = 0; j < 8; j++)
 				input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1));
 
+			input_sync(dev);
+
 			return 0;
 	}
 

drivers/input/joystick/spaceball.c

@@ -137,6 +137,8 @@ static void spaceball_process_packet(struct spaceball* spaceball)
 			printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1);
 			break;
 	}
+
+	input_sync(dev);
 }
 
 /*

drivers/input/joystick/spaceorb.c

@@ -124,6 +124,8 @@ static void spaceorb_process_packet(struct spaceorb *spaceorb)
 			printk("]\n");
 			break;
 	}
+
+	input_sync(dev);
 }
 
 static void spaceorb_interrupt(struct serio *serio, unsigned char data, unsigned int flags)

drivers/input/joystick/stinger.c

@@ -85,6 +85,8 @@ static void stinger_process_packet(struct stinger *stinger)
 	input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6));
 	input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F));
 
+	input_sync(dev);
+
 	return;
 }
 

drivers/input/joystick/tmdc.c

@@ -214,6 +214,8 @@ static void tmdc_timer(unsigned long private)
 						((data[j][tmdc_byte_d[k]] >> (i + tmdc->btno[j][k])) & 1));
 				l += tmdc->btnc[j][k];
 			}
+
+			input_sync(dev);
 	}
 
 	tmdc->bads += bad;

drivers/input/joystick/turbografx.c

@@ -101,6 +101,8 @@ static void tgfx_timer(unsigned long private)
 			input_report_key(dev, BTN_THUMB2,  (data2 & TGFX_THUMB2 ));
 			input_report_key(dev, BTN_TOP,     (data2 & TGFX_TOP    ));
 			input_report_key(dev, BTN_TOP2,    (data2 & TGFX_TOP2   ));
+
+			input_sync(dev);
 		}
 
 	mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);

drivers/input/joystick/twidjoy.c

@@ -127,6 +127,8 @@ static void twidjoy_process_packet(struct twidjoy *twidjoy)
 
 		input_report_abs(dev, ABS_X, -abs_x);
 		input_report_abs(dev, ABS_Y, +abs_y);
+
+		input_sync(dev);
 	}
 
 	return;

drivers/input/joystick/warrior.c

@@ -76,18 +76,19 @@ static void warrior_process_packet(struct warrior *warrior)
 			input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
 			input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
 			input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
-			return;
+			break;
 		case 3:					/* XY-axis info->data */
 			input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
 			input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
-			return;
+			break;
 		case 5:					/* Throttle, spinner, hat info->data */
 			input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
 			input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
 			input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
 			input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
-			return;
+			break;
 	}
+	input_sync(dev);
 }
 
 /*

drivers/input/keybdev.c

@@ -132,11 +132,10 @@ void keybdev_ledfunc(unsigned int led)
 	struct input_handle *handle;	
 
 	for (handle = keybdev_handler.handle; handle; handle = handle->hnext) {
-
 		input_event(handle->dev, EV_LED, LED_SCROLLL, !!(led & 0x01));
 		input_event(handle->dev, EV_LED, LED_NUML,    !!(led & 0x02));
 		input_event(handle->dev, EV_LED, LED_CAPSL,   !!(led & 0x04));
-
+		input_sync(handle->dev);
 	}
 }
 

drivers/input/keyboard/amikbd.c

@@ -88,10 +88,12 @@ static void amikbd_interrupt(int irq, void *dummy, struct pt_regs *fp)
 		if (scancode == KEY_CAPS) {	/* CapsLock is a toggle switch key on Amiga */
 			input_report_key(&amikbd_dev, scancode, 1);
 			input_report_key(&amikbd_dev, scancode, 0);
+			input_sync(&amikbd_dev);
 			return;
 		}
 		
 		input_report_key(&amikbd_dev, scancode, down);
+		input_sync(&amikbd_dev);
 
 		return;
 	}

drivers/input/keyboard/atkbd.c

@@ -195,6 +195,7 @@ static void atkbd_interrupt(struct serio *serio, unsigned char data, unsigned in
 			break;
 		default:
 			input_report_key(&atkbd->dev, atkbd->keycode[code], !atkbd->release);
+			input_sync(&atkbd->dev);
 	}
 		
 	atkbd->release = 0;

drivers/input/keyboard/maple_keyb.c

@@ -76,6 +76,8 @@ static void dc_scan_kbd(struct dc_kbd *kbd)
 		}
 	}
 
+	input_sync(dev);
+
 	memcpy(kbd->old, kbd->new, 8);
 }
 

drivers/input/keyboard/newtonkbd.c

@@ -72,6 +72,8 @@ void nkbd_interrupt(struct serio *serio, unsigned char data, unsigned int flags)
 
 	else if (data == 0xe7) /* end of init sequence */
 		printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
+
+	input_sync(&nkbd->dev);
 }
 
 void nkbd_connect(struct serio *serio, struct serio_dev *dev)

drivers/input/keyboard/ps2serkbd.c

@@ -161,6 +161,7 @@ static void ps2serkbd_interrupt(struct serio *serio, unsigned char data, unsigne
         break;
     default:
         input_report_key(&ps2serkbd->dev, ps2serkbd->keycode[code], !ps2serkbd->release);
+	input_sync(&ps2serkbd->dev);
     }
 
     ps2serkbd->release = 0;

drivers/input/keyboard/sunkbd.c

@@ -121,6 +121,7 @@ static void sunkbd_interrupt(struct serio *serio, unsigned char data, unsigned i
 		default:
 			if (sunkbd->keycode[data & SUNKBD_KEY]) {
                                 input_report_key(&sunkbd->dev, sunkbd->keycode[data & SUNKBD_KEY], !(data & SUNKBD_RELEASE));
+				input_sync(&sunkbd->dev);
                         } else {
                                 printk(KERN_WARNING "sunkbd.c: Unknown key (scancode %#x) %s.\n",
                                         data & SUNKBD_KEY, data & SUNKBD_RELEASE ? "released" : "pressed");

drivers/input/keyboard/xtkbd.c

@@ -75,6 +75,7 @@ void xtkbd_interrupt(struct serio *serio, unsigned char data, unsigned int flags
 
 			if (xtkbd->keycode[data & XTKBD_KEY]) {
 				input_report_key(&xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
+				input_sync(&xtkbd->dev);
 			} else {
 				printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
 					data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");

drivers/input/mouse/amimouse.c

@@ -68,6 +68,8 @@ static void amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp)
 	input_report_key(&amimouse_dev, BTN_LEFT,   ciaa.pra & 0x40);
 	input_report_key(&amimouse_dev, BTN_MIDDLE, potgor & 0x0100);
 	input_report_key(&amimouse_dev, BTN_RIGHT,  potgor & 0x0400);
+
+	input_sync(&amimouse_dev);
 }
 
 static int amimouse_open(struct input_dev *dev)

drivers/input/mouse/inport.c

@@ -139,6 +139,8 @@ static void inport_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 
 	outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 	outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
+
+	input_sync(&inport_dev);
 }
 
 #ifndef MODULE

drivers/input/mouse/logibm.c

@@ -128,6 +128,8 @@ static void logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 	input_report_key(&logibm_dev, BTN_RIGHT,  buttons & 1);
 	input_report_key(&logibm_dev, BTN_MIDDLE, buttons & 2);
 	input_report_key(&logibm_dev, BTN_LEFT,   buttons & 4);
+	input_sync(&logibm_dev);
+
 	outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
 }
 

drivers/input/mouse/maplemouse.c

@@ -40,6 +40,7 @@ static void dc_mouse_callback(struct mapleq *mq)
 	input_report_rel(dev, REL_X,      relx);
 	input_report_rel(dev, REL_Y,      rely);
 	input_report_rel(dev, REL_WHEEL,  relz);
+	input_sync(dev);
 }
 
 

drivers/input/mouse/pc110pad.c

@@ -78,6 +78,7 @@ static void pc110pad_interrupt(int irq, void *ptr, struct pt_regs *regs)
 		pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
 	input_report_abs(&pc110pad_dev, ABS_Y,
 		pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
+	input_sync(&pc110pad_dev);
 
 	pc110pad_count = 0;
 }
@@ -90,8 +91,6 @@ static void pc110pad_close(struct input_dev *dev)
 
 static int pc110pad_open(struct input_dev *dev)
 {
-	unsigned long flags;
-	
 	if (pc110pad_used++)
 		return 0;
 

drivers/input/mouse/psmouse.c

@@ -167,6 +167,7 @@ static void psmouse_process_packet(struct psmouse *psmouse)
 	input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
 	input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
 
+	input_sync(dev);
 }
 
 /*

drivers/input/mouse/rpcmouse.c

@@ -63,6 +63,8 @@ static void rpcmouse_irq(int irq, void *dev_id, struct pt_regs *regs)
 	input_report_key(&rpcmouse_dev, BTN_LEFT,   b & 0x10);
 	input_report_key(&rpcmouse_dev, BTN_MIDDLE, b & 0x20);
 	input_report_key(&rpcmouse_dev, BTN_RIGHT,  b & 0x40);
+
+	input_sync(&rpcmouse_dev);
 }
 
 static int __init rpcmouse_init(void)

drivers/input/mouse/sermouse.c

@@ -89,6 +89,8 @@ static void sermouse_process_msc(struct sermouse *sermouse, signed char data)
 			break;
 	}
 
+	input_sync(dev);
+
 	if (++sermouse->count == (5 - ((sermouse->type == SERIO_SUN) << 1)))
 		sermouse->count = 0;
 }
@@ -188,6 +190,8 @@ static void sermouse_process_ms(struct sermouse *sermouse, signed char data)
 			break;
 	}
 
+	input_sync(dev);
+
 	sermouse->count++;
 }
 

drivers/input/mousedev.c

@@ -94,9 +94,10 @@ static void mousedev_event(struct input_handle *handle, unsigned int type, unsig
 	struct mousedev *mousedevs[3] = { handle->private, &mousedev_mix, NULL };
 	struct mousedev **mousedev = mousedevs;
 	struct mousedev_list *list;
-	int index, size;
+	int index, size, wake;
 
 	while (*mousedev) {
+		wake = 0;
 		list = (*mousedev)->list;
 		while (list) {
 			switch (type) {
@@ -158,16 +159,20 @@ static void mousedev_event(struct input_handle *handle, unsigned int type, unsig
 						case 2: return;
 					}
 					break;
-			}
-					
-			list->ready = 1;
-
-			kill_fasync(&list->fasync, SIGIO, POLL_IN);
 
+				case EV_SYN:
+					switch (code) {
+						case SYN_REPORT:
+							list->ready = 1;
+							kill_fasync(&list->fasync, SIGIO, POLL_IN);
+							wake = 1;
+							break;
+					}
+			}
 			list = list->next;
 		}
-
-		wake_up_interruptible(&((*mousedev)->wait));
+		if (wake)
+			wake_up_interruptible(&((*mousedev)->wait));
 		mousedev++;
 	}
 }

drivers/input/touchscreen/gunze.c

@@ -74,6 +74,7 @@ static void gunze_process_packet(struct gunze* gunze)
 	input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10) * 4);
 	input_report_abs(dev, ABS_Y, 3072 - simple_strtoul(gunze->data + 6, NULL, 10) * 3);
 	input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
+	input_sync(dev);
 }
 
 static void gunze_interrupt(struct serio *serio, unsigned char data, unsigned int flags)

drivers/input/touchscreen/h3600_ts_input.c

@@ -109,6 +109,7 @@ static void action_button_handler(int irq, void *dev_id, struct pt_regs *regs)
 	struct input_dev *dev = (struct input_dev *) dev_id;
 
 	input_report_key(dev, KEY_ENTER, down);
+	input_sync(dev);
 }
 
 static void npower_button_handler(int irq, void *dev_id, struct pt_regs *regs)
@@ -122,6 +123,7 @@ static void npower_button_handler(int irq, void *dev_id, struct pt_regs *regs)
 	 */ 	
 	input_report_key(dev, KEY_SUSPEND, 1);
 	input_report_key(dev, KEY_SUSPEND, down); 	
+	input_sync(dev);
 }
 
 #ifdef CONFIG_PM
@@ -267,6 +269,8 @@ static void h3600ts_process_packet(struct h3600_dev *ts)
 			/* Send a non input event elsewhere */
 			break;
         }
+
+	input_sync(dev);
 }
 
 /*

drivers/macintosh/adbhid.c

@@ -163,6 +163,8 @@ adbhid_input_keycode(int id, int keycode, int repeat)
 	else
 		printk(KERN_INFO "Unhandled ADB key (scancode %#02x) %s.\n", keycode,
 		       up_flag ? "released" : "pressed");
+
+	input_sync(&adbhid[id]->input);
 }
 
 static void
@@ -259,6 +261,8 @@ adbhid_mouse_input(unsigned char *data, int nb, struct pt_regs *regs, int autopo
 			 ((data[2]&0x7f) < 64 ? (data[2]&0x7f) : (data[2]&0x7f)-128 ));
 	input_report_rel(&adbhid[id]->input, REL_Y,
 			 ((data[1]&0x7f) < 64 ? (data[1]&0x7f) : (data[1]&0x7f)-128 ));
+
+	input_sync(&adbhid[id]->input);
 }
 
 static void
@@ -363,6 +367,8 @@ adbhid_buttons_input(unsigned char *data, int nb, struct pt_regs *regs, int auto
 	  }
 	  break;
 	}
+
+	input_sync(&adbhid[id]->input);
 }
 
 static struct adb_request led_request;

drivers/macintosh/mac_hid.c

@@ -162,6 +162,7 @@ int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
 			 	input_report_key(&emumousebtn,
 						 keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
 						 down);
+				input_sync(&emumousebtn);
 				return 1;
 			}
 			mouse_last_keycode = down ? keycode : 0;

drivers/usb/input/aiptek.c

@@ -161,6 +161,8 @@ aiptek_irq(struct urb *urb)
 		input_report_key(dev, BTN_STYLUS2, data[5] & 0x10);
 	}
 
+	input_sync(dev);
+
 }
 
 struct aiptek_features aiptek_features[] = {

drivers/usb/input/hid-core.c

@@ -903,6 +903,9 @@ static int hid_input_report(int type, struct urb *urb)
 	for (n = 0; n < report->maxfield; n++)
 		hid_input_field(hid, report->field[n], data);
 
+	if (hid->claimed & HID_CLAIMED_INPUT)
+		hidinput_report_event(hid, report);
+
 	return 0;
 }
 

drivers/usb/input/hid-input.c

@@ -428,6 +428,11 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
 		input_event(input, usage->type, usage->code, 0);
 }
 
+void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
+{
+	input_sync(&hid->input);
+}
+
 static int hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 {
 	struct hid_device *hid = dev->private;

drivers/usb/input/hid.h

@@ -416,11 +416,13 @@ struct hid_descriptor {
 /* We ignore a few input applications that are not widely used */
 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || ( a == 0x00010080) || ( a == 0x000c0001))
 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
+extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 extern int hidinput_connect(struct hid_device *);
 extern void hidinput_disconnect(struct hid_device *);
 #else
 #define IS_INPUT_APPLICATION(a) (0)
 static inline void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) { }
+static inline void hidinput_report_event(struct hid_device *hid, struct hid_report *report) { }
 static inline int hidinput_connect(struct hid_device *hid) { return -ENODEV; }
 static inline void hidinput_disconnect(struct hid_device *hid) { }
 #endif

drivers/usb/input/powermate.c

@@ -83,6 +83,7 @@ static void powermate_irq(struct urb *urb)
 	/* handle updates to device state */
 	input_report_key(&pm->input, BTN_0, pm->data[0] & 0x01);
 	input_report_rel(&pm->input, REL_DIAL, pm->data[1]);
+	input_sync(&pm->input);
 }
 
 /* Decide if we need to issue a control message and do so. Must be called with pm->lock down */

drivers/usb/input/usbkbd.c

@@ -104,6 +104,8 @@ static void usb_kbd_irq(struct urb *urb)
 		}
 	}
 
+	input_sync(&kbd->dev);
+
 	memcpy(kbd->old, kbd->new, 8);
 }
 
@@ -236,7 +238,7 @@ static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
 
 	kbd->dev.name = kbd->name;
 	kbd->dev.phys = kbd->phys;	
-	kbd->dev.id.bus = BUS_USB;
+	kbd->dev.id.bustype = BUS_USB;
 	kbd->dev.id.vendor = dev->descriptor.idVendor;
 	kbd->dev.id.product = dev->descriptor.idProduct;
 	kbd->dev.id.version = dev->descriptor.bcdDevice;

drivers/usb/input/usbmouse.c

@@ -72,6 +72,8 @@ static void usb_mouse_irq(struct urb *urb)
 	input_report_rel(dev, REL_X,     data[1]);
 	input_report_rel(dev, REL_Y,     data[2]);
 	input_report_rel(dev, REL_WHEEL, data[3]);
+
+	input_sync(dev);
 }
 
 static int usb_mouse_open(struct input_dev *dev)
@@ -145,7 +147,7 @@ static void *usb_mouse_probe(struct usb_device *dev, unsigned int ifnum,
 
 	mouse->dev.name = mouse->name;
 	mouse->dev.phys = mouse->phys;
-	mouse->dev.id.bus = BUS_USB;
+	mouse->dev.id.bustype = BUS_USB;
 	mouse->dev.id.vendor = dev->descriptor.idVendor;
 	mouse->dev.id.product = dev->descriptor.idProduct;
 	mouse->dev.id.version = dev->descriptor.bcdDevice;

drivers/usb/input/wacom.c

@@ -136,6 +136,7 @@ static void wacom_pl_irq(struct urb *urb)
 	}
 	
 	input_event(dev, EV_MSC, MSC_SERIAL, 0);
+	input_sync(dev);
 }
 
 static void wacom_graphire_irq(struct urb *urb)
@@ -189,6 +190,8 @@ static void wacom_graphire_irq(struct urb *urb)
 	input_report_key(dev, BTN_STYLUS2, data[1] & 0x04);
 
 	input_event(dev, EV_MSC, MSC_SERIAL, data[1] & 0x01);
+
+	input_sync(dev);
 }
 
 static void wacom_intuos_irq(struct urb *urb)
@@ -291,6 +294,8 @@ static void wacom_intuos_irq(struct urb *urb)
 	}
 	
 	input_event(dev, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
+
+	input_sync(dev);
 }
 
 #define WACOM_INTUOS_TOOLS	(BIT(BTN_TOOL_BRUSH) | BIT(BTN_TOOL_PENCIL) | BIT(BTN_TOOL_AIRBRUSH) | BIT(BTN_TOOL_LENS))

drivers/usb/input/xpad.c

@@ -158,6 +158,8 @@ static void xpad_process_packet(struct usb_xpad *xpad, u16 cmd, unsigned char *d
 	/* "analog" buttons black, white */
 	input_report_key(dev, BTN_C, data[8]);
 	input_report_key(dev, BTN_Z, data[9]);
+
+	input_sync(dev);
 }
 
 static void xpad_irq_in(struct urb *urb)

include/linux/input.h

@@ -57,10 +57,10 @@ struct input_event {
  */
 
 struct input_devinfo {
-	uint16_t bustype;
-	uint16_t vendor;
-	uint16_t product;
-	uint16_t version;
+	__u16 bustype;
+	__u16 vendor;
+	__u16 product;
+	__u16 version;
 };
 
 #define EVIOCGVERSION		_IOR('E', 0x01, int)			/* get driver version */
@@ -89,7 +89,7 @@ struct input_devinfo {
  * Event types
  */
 
-#define EV_RST			0x00
+#define EV_SYN			0x00
 #define EV_KEY			0x01
 #define EV_REL			0x02
 #define EV_ABS			0x03
@@ -102,6 +102,13 @@ struct input_devinfo {
 #define EV_FF_STATUS		0x17
 #define EV_MAX			0x1f
 
+/*
+ * Synchronization events.
+ */
+
+#define SYN_REPORT		0
+#define SYN_CONFIG		1
+
 /*
  * Keys and buttons
  */
@@ -769,6 +776,8 @@ struct input_dev {
 	struct pm_dev *pm_dev;
 	int state;
 
+	int sync;
+
 	int abs[ABS_MAX + 1];
 	int rep[REP_MAX + 1];
 
@@ -883,6 +892,7 @@ void input_unregister_minor(devfs_handle_t handle);
 
 void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
 
+#define input_sync(a)		input_event(a, EV_SYN, SYN_REPORT, 0)
 #define input_report_key(a,b,c) input_event(a, EV_KEY, b, !!(c))
 #define input_report_rel(a,b,c) input_event(a, EV_REL, b, c)
 #define input_report_abs(a,b,c) input_event(a, EV_ABS, b, c)