[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 <zippel@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 15 insertions, 4 deletions

diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index ece13cbf9950..7f812641790c 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -332,6 +332,9 @@ static void atari_shutdown_irq(unsigned int irq)
         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 = {
@@ -356,7 +359,7 @@ 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) */
@@ -403,8 +406,10 @@ void __init atari_init_IRQ(void)
                  * 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)) {
diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
index c44df4a4a331..e0d3c8bfb408 100644
--- a/arch/m68k/atari/time.c
+++ b/arch/m68k/atari/time.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/rtc.h>
 #include <linux/bcd.h>
+#include <linux/delay.h>
 
 #include <asm/atariints.h>
 
@@ -212,8 +213,12 @@ int atari_tt_hwclk( int op, struct rtc_time *t )
      * 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 );
diff --git a/arch/m68k/kernel/ints.c b/arch/m68k/kernel/ints.c
index 849c9488c7f8..84aceca6c05c 100644
--- a/arch/m68k/kernel/ints.c
+++ b/arch/m68k/kernel/ints.c
@@ -132,6 +132,7 @@ void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
 {
         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;