[PATCH] m68k/Atari: Interrupt updates

Misc Atari fixes:
- initialize correct number of atari irqs
- silence vbl interrupt until it's used by atafb
- use mdelay() to read clock if necessary

Signed-off-by: Roman Zippel <[e-mail]>
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/m68k/atari/ataints.c

···
 	atari_disable_irq(irq);
 	atari_turnoff_irq(irq);
 	m68k_irq_shutdown(irq);
+
+	if (irq == IRQ_AUTO_4)
+	    vectors[VEC_INT4] = falcon_hblhandler;
 }
 
 static struct irq_controller atari_irq_controller = {
···
 
 void __init atari_init_IRQ(void)
 {
-	m68k_setup_user_interrupt(VEC_USER, 192, NULL);
+	m68k_setup_user_interrupt(VEC_USER, NUM_ATARI_SOURCES - IRQ_USER, NULL);
 	m68k_setup_irq_controller(&atari_irq_controller, 1, NUM_ATARI_SOURCES - 1);
 
 	/* Initialize the MFP(s) */
···
 		 * gets overruns)
 		 */
 
-		if (!MACH_IS_HADES)
+		if (!MACH_IS_HADES) {
 			vectors[VEC_INT2] = falcon_hblhandler;
+			vectors[VEC_INT4] = falcon_hblhandler;
+		}
 	}
 
 	if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) {

arch/m68k/atari/time.c

···
 #include <linux/init.h>
 #include <linux/rtc.h>
 #include <linux/bcd.h>
+#include <linux/delay.h>
 
 #include <asm/atariints.h>
 
···
      * additionally the RTC_SET bit is set to prevent an update cycle.
      */
 
-    while( RTC_READ(RTC_FREQ_SELECT) & RTC_UIP )
-        schedule_timeout_interruptible(HWCLK_POLL_INTERVAL);
+    while( RTC_READ(RTC_FREQ_SELECT) & RTC_UIP ) {
+	if (in_atomic() || irqs_disabled())
+	    mdelay(1);
+	else
+	    schedule_timeout_interruptible(HWCLK_POLL_INTERVAL);
+    }
 
     local_irq_save(flags);
     RTC_WRITE( RTC_CONTROL, ctrl | RTC_SET );

arch/m68k/kernel/ints.c

···
 {
 	int i;
 
+	BUG_ON(IRQ_USER + cnt >= NR_IRQS);
 	m68k_first_user_vec = vec;
 	for (i = 0; i < cnt; i++)
 		irq_controller[IRQ_USER + i] = &user_irq_controller;