PPC32: Change interrupt handlers to return irqreturn_t.

arch/ppc/4xx_io/serial_sicc.c

@@ -431,11 +431,7 @@ static void siccuart_event(struct SICC_info *info, int event)
 }
 
 static void
-#ifdef SUPPORT_SYSRQ
 siccuart_rx_chars(struct SICC_info *info, struct pt_regs *regs)
-#else
-siccuart_rx_chars(struct SICC_info *info)
-#endif
 {
     struct tty_struct *tty = info->tty;
     unsigned int status, ch, rsr, flg, ignored = 0;
@@ -574,25 +570,19 @@ static void siccuart_tx_chars(struct SICC_info *info)
 }
 
 
-static void siccuart_int_rx(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t siccuart_int_rx(int irq, void *dev_id, struct pt_regs *regs)
 {
     struct SICC_info *info = dev_id;
-
-#ifdef SUPPORT_SYSRQ
-            siccuart_rx_chars(info, regs);
-#else
-            siccuart_rx_chars(info);
-#endif
-
-      //powerpcClearUicsrBits(0x00000400);
+    siccuart_rx_chars(info, regs);
+    return IRQ_HANDLED;
 }
 
 
-static void siccuart_int_tx(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t siccuart_int_tx(int irq, void *dev_id, struct pt_regs *regs)
 {
     struct SICC_info *info = dev_id;
     siccuart_tx_chars(info);
-
+    return IRQ_HANDLED;
 }
 
 static void siccuart_tasklet_action(unsigned long data)

arch/ppc/8260_io/enet.c

@@ -122,7 +122,7 @@ struct scc_enet_private {
 static int scc_enet_open(struct net_device *dev);
 static int scc_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
 static int scc_enet_rx(struct net_device *dev);
-static void scc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+static irqreturn_t scc_enet_interrupt(int irq, void *dev_id, struct pt_regs *);
 static int scc_enet_close(struct net_device *dev);
 static struct net_device_stats *scc_enet_get_stats(struct net_device *dev);
 static void set_multicast_list(struct net_device *dev);
@@ -272,7 +272,7 @@ scc_enet_timeout(struct net_device *dev)
 /* The interrupt handler.
  * This is called from the CPM handler, not the MPC core interrupt.
  */
-static void
+static irqreturn_t
 scc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 {
 	struct	net_device *dev = dev_id;
@@ -403,7 +403,7 @@ scc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 		printk("SCC ENET: BSY can't happen.\n");
 	}
 
-	return;
+	return IRQ_HANDLED;
 }
 
 /* During a receive, the cur_rx points to the current incoming buffer.

arch/ppc/8260_io/fcc_enet.c

@@ -126,7 +126,7 @@ typedef struct {
 static int fcc_enet_open(struct net_device *dev);
 static int fcc_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
 static int fcc_enet_rx(struct net_device *dev);
-static	void fcc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+static irqreturn_t fcc_enet_interrupt(int irq, void *dev_id, struct pt_regs *);
 static int fcc_enet_close(struct net_device *dev);
 static struct net_device_stats *fcc_enet_get_stats(struct net_device *dev);
 static void set_multicast_list(struct net_device *dev);
@@ -452,7 +452,7 @@ fcc_enet_timeout(struct net_device *dev)
 }
 
 /* The interrupt handler. */
-static void
+static irqreturn_t
 fcc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 {
 	struct	net_device *dev = dev_id;
@@ -583,7 +583,7 @@ fcc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 	if (int_events & FCC_ENET_BSY) {
 		cep->stats.rx_dropped++;
 	}
-	return;
+	return IRQ_HANDLED;
 }
 
 /* During a receive, the cur_rx points to the current incoming buffer.
@@ -1203,7 +1203,7 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
 }
 
 /* This interrupt occurs when the PHY detects a link change. */
-static void
+static irqreturn_t
 mii_link_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 {
 	struct	net_device *dev = dev_id;
@@ -1211,6 +1211,7 @@ mii_link_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 
 	mii_do_cmd(dev, fep->phy->ack_int);
 	mii_do_cmd(dev, phy_cmd_relink);  /* restart and display status */
+	return IRQ_HANDLED;
 }
 
 #endif	/* CONFIG_USE_MDIO */

arch/ppc/8260_io/uart.c

@@ -570,7 +570,7 @@ static _INLINE_ void check_modem_status(struct async_struct *info)
 /*
  * This is the serial driver's interrupt routine for a single port
  */
-static void rs_8xx_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+static irqreturn_t rs_8xx_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 {
 	u_char	events;
 	int	idx;
@@ -610,6 +610,7 @@ static void rs_8xx_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 #ifdef SERIAL_DEBUG_INTR
 	printk("end.\n");
 #endif
+	return IRQ_HANDLED;
 }
 
 

arch/ppc/amiga/amiints.c

@@ -55,10 +55,6 @@
 #include <asm/amigappc.h>
 #endif
 
-extern int cia_request_irq(int irq,
-                           void (*handler)(int, void *, struct pt_regs *),
-                           unsigned long flags, const char *devname, void *dev_id);
-extern void cia_free_irq(unsigned int irq, void *dev_id);
 extern void cia_init_IRQ(struct ciabase *base);
 
 unsigned short ami_intena_vals[AMI_STD_IRQS] = {

arch/ppc/amiga/config.c

@@ -71,7 +71,7 @@ static char amiga_model_name[13] = "Amiga ";
 
 extern char m68k_debug_device[];
 
-static void amiga_sched_init(void (*handler)(int, void *, struct pt_regs *));
+static void amiga_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
 /* amiga specific irq functions */
 extern void amiga_init_IRQ (void);
 extern void (*amiga_default_handler[]) (int, void *, struct pt_regs *);
@@ -478,8 +478,8 @@ void __init config_amiga(void)
 
 static unsigned short jiffy_ticks;
 
-static void __init amiga_sched_init(void (*timer_routine)(int, void *,
-							  struct pt_regs *))
+static void __init amiga_sched_init(irqreturn_t (*timer_routine)(int, void *,
+						struct pt_regs *))
 {
 	static struct resource sched_res = {
 	    "timer", 0x00bfd400, 0x00bfd5ff,

arch/ppc/kernel/irq.c

@@ -210,7 +210,8 @@ void free_irq(unsigned int irq, void* dev_id)
 	return;
 }
 
-int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
+int request_irq(unsigned int irq,
+	irqreturn_t (*handler)(int, void *, struct pt_regs *),
 	unsigned long irqflags, const char * devname, void *dev_id)
 {
 	struct irqaction *action;
@@ -218,16 +219,9 @@ int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *)
 
 	if (irq >= NR_IRQS)
 		return -EINVAL;
-	if (!handler)
-	{
-		/*
-		 * free_irq() used to be implemented as a call to
-		 * request_irq() with handler being NULL.  Now we have
-		 * a real free_irq() but need to allow the old behavior
-		 * for old code that hasn't caught up yet.
-		 *  -- Cort <cort@fsmlabs.com>
-		 */
-		free_irq(irq, dev_id);
+	if (!handler) {
+		printk(KERN_ERR "request_irq called with NULL handler!\n");
+		dump_stack();
 		return 0;
 	}
 	
@@ -246,8 +240,7 @@ int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *)
 	action->next = NULL;
 	
 	retval = setup_irq(irq, action);
-	if (retval)
-	{
+	if (retval) {
 		kfree(action);
 		return retval;
 	}
@@ -732,6 +725,7 @@ void init_irq_proc (void)
 	}
 }
 
-void no_action(int irq, void *dev, struct pt_regs *regs)
+irqreturn_t no_action(int irq, void *dev, struct pt_regs *regs)
 {
+	return IRQ_NONE;
 }

arch/ppc/platforms/pmac_smp.c

@@ -189,10 +189,11 @@ psurge_smp_message_recv(struct pt_regs *regs)
 			smp_message_recv(msg, regs);
 }
 
-void __pmac
+irqreturn_t __pmac
 psurge_primary_intr(int irq, void *d, struct pt_regs *regs)
 {
 	psurge_smp_message_recv(regs);
+	return IRQ_HANDLED;
 }
 
 static void __pmac

arch/ppc/platforms/prep_setup.c

@@ -850,7 +850,7 @@ prep_res_calibrate_decr(void)
 static volatile int calibrate_steps __initdata = 3;
 static unsigned tbstamp __initdata = 0;
 
-static void __init
+static irqreturn_t __init
 prep_calibrate_decr_handler(int irq, void *dev, struct pt_regs *regs)
 {
 	unsigned long t, freq;
@@ -866,6 +866,7 @@ prep_calibrate_decr_handler(int irq, void *dev, struct pt_regs *regs)
 		tb_ticks_per_jiffy = freq / HZ;
 		tb_to_us = mulhwu_scale_factor(freq, 1000000);
 	}
+	return IRQ_HANDLED;
 }
 
 static void __init

arch/ppc/syslib/open_pic.c

@@ -821,9 +821,10 @@ static void openpic_end_ipi(unsigned int irq_nr)
 {
 }
 
-static void openpic_ipi_action(int cpl, void *dev_id, struct pt_regs *regs)
+static irqreturn_t openpic_ipi_action(int cpl, void *dev_id, struct pt_regs *regs)
 {
 	smp_message_recv(cpl-OPENPIC_VEC_IPI-open_pic_irq_offset, regs);
+	return IRQ_HANDLED;
 }
 
 #endif /* CONFIG_SMP */

arch/ppc/syslib/ppc8xx_pic.c

@@ -168,7 +168,8 @@ void mbx_i8259_action(int cpl, void *dev_id, struct pt_regs *regs)
  * drivers that may mess up the internal interrupt controllers, and also
  * allow them to run without modification on the MBX.
  */
-int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
+int request_irq(unsigned int irq,
+	irqreturn_t (*handler)(int, void *, struct pt_regs *),
 	unsigned long irqflags, const char * devname, void *dev_id)
 {