---

yaml
---
r: 325615
b: refs/heads/master
c: 3db1ddb
h: refs/heads/master
i:
  325613: ea38721
  325611: 279f61b
  325607: 6a58891
  325599: ed92331
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ce7240e445303de3ca66e6d08f17a2ec278a5bf6
+refs/heads/master: 3db1ddb725dcd9a2bb32be2b64d0688c3e1c4579

trunk/drivers/tty/vt/keyboard.c

@@ -119,6 +119,7 @@ static const int NR_TYPES = ARRAY_SIZE(max_vals);
 
 static struct input_handler kbd_handler;
 static DEFINE_SPINLOCK(kbd_event_lock);
+static DEFINE_SPINLOCK(led_lock);
 static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)];	/* keyboard key bitmap */
 static unsigned char shift_down[NR_SHIFT];		/* shift state counters.. */
 static bool dead_key_next;
@@ -984,23 +985,23 @@ static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
  * or (ii) whatever pattern of lights people want to show using KDSETLED,
  * or (iii) specified bits of specified words in kernel memory.
  */
-unsigned char getledstate(void)
+static unsigned char getledstate(void)
 {
 	return ledstate;
 }
 
 void setledstate(struct kbd_struct *kbd, unsigned int led)
 {
         unsigned long flags;
-        spin_lock_irqsave(&kbd_event_lock, flags);
+        spin_lock_irqsave(&led_lock, flags);
 	if (!(led & ~7)) {
 		ledioctl = led;
 		kbd->ledmode = LED_SHOW_IOCTL;
 	} else
 		kbd->ledmode = LED_SHOW_FLAGS;
 
 	set_leds();
-	spin_unlock_irqrestore(&kbd_event_lock, flags);
+	spin_unlock_irqrestore(&led_lock, flags);
 }
 
 static inline unsigned char getleds(void)
@@ -1051,8 +1052,11 @@ int vt_get_leds(int console, int flag)
 {
 	struct kbd_struct * kbd = kbd_table + console;
 	int ret;
+	unsigned long flags;
 
+	spin_lock_irqsave(&led_lock, flags);
 	ret = vc_kbd_led(kbd, flag);
+	spin_unlock_irqrestore(&led_lock, flags);
 
 	return ret;
 }
@@ -1088,11 +1092,11 @@ void vt_set_led_state(int console, int leds)
 void vt_kbd_con_start(int console)
 {
 	struct kbd_struct * kbd = kbd_table + console;
-/*	unsigned long flags; */
-/*	spin_lock_irqsave(&kbd_event_lock, flags); */
+	unsigned long flags;
+	spin_lock_irqsave(&led_lock, flags);
 	clr_vc_kbd_led(kbd, VC_SCROLLOCK);
 	set_leds();
-/*	spin_unlock_irqrestore(&kbd_event_lock, flags); */
+	spin_unlock_irqrestore(&led_lock, flags);
 }
 
 /**
@@ -1101,21 +1105,15 @@ void vt_kbd_con_start(int console)
  *
  *	Handle console stop. This is a wrapper for the VT layer
  *	so that we can keep kbd knowledge internal
- *
- *	FIXME: We eventually need to hold the kbd lock here to protect
- *	the LED updating. We can't do it yet because fn_hold calls stop_tty
- *	and start_tty under the kbd_event_lock, while normal tty paths
- *	don't hold the lock. We probably need to split out an LED lock
- *	but not during an -rc release!
  */
 void vt_kbd_con_stop(int console)
 {
 	struct kbd_struct * kbd = kbd_table + console;
-/*	unsigned long flags; */
-/*	spin_lock_irqsave(&kbd_event_lock, flags); */
+	unsigned long flags;
+	spin_lock_irqsave(&led_lock, flags);
 	set_vc_kbd_led(kbd, VC_SCROLLOCK);
 	set_leds();
-/*	spin_unlock_irqrestore(&kbd_event_lock, flags); */
+	spin_unlock_irqrestore(&led_lock, flags);
 }
 
 /*
@@ -1127,7 +1125,12 @@ void vt_kbd_con_stop(int console)
  */
 static void kbd_bh(unsigned long dummy)
 {
-	unsigned char leds = getleds();
+	unsigned char leds;
+	unsigned long flags;
+
+	spin_lock_irqsave(&led_lock, flags);
+	leds = getleds();
+	spin_unlock_irqrestore(&led_lock, flags);
 
 	if (leds != ledstate) {
 		input_handler_for_each_handle(&kbd_handler, &leds,
@@ -2032,11 +2035,11 @@ int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm)
 			return -EPERM;
 		if (arg & ~0x77)
 			return -EINVAL;
-                spin_lock_irqsave(&kbd_event_lock, flags);
+                spin_lock_irqsave(&led_lock, flags);
 		kbd->ledflagstate = (arg & 7);
 		kbd->default_ledflagstate = ((arg >> 4) & 7);
 		set_leds();
-                spin_unlock_irqrestore(&kbd_event_lock, flags);
+                spin_unlock_irqrestore(&led_lock, flags);
 		return 0;
 
 	/* the ioctls below only set the lights, not the functions */
@@ -2131,8 +2134,10 @@ void vt_reset_keyboard(int console)
 	clr_vc_kbd_mode(kbd, VC_CRLF);
 	kbd->lockstate = 0;
 	kbd->slockstate = 0;
+	spin_lock(&led_lock);
 	kbd->ledmode = LED_SHOW_FLAGS;
 	kbd->ledflagstate = kbd->default_ledflagstate;
+	spin_unlock(&led_lock);
 	/* do not do set_leds here because this causes an endless tasklet loop
 	   when the keyboard hasn't been initialized yet */
 	spin_unlock_irqrestore(&kbd_event_lock, flags);

trunk/include/linux/kbd_kern.h

@@ -65,7 +65,6 @@ struct kbd_struct {
 
 extern int kbd_init(void);
 
-extern unsigned char getledstate(void);
 extern void setledstate(struct kbd_struct *kbd, unsigned int led);
 
 extern int do_poke_blanked_console;