drivers/char: comment fix: CMOS RTC update code is now in kernel/time/ntp.c
[linux-2.6.git] / drivers / char / snsc_event.c
index d692af5..ee15694 100644 (file)
@@ -5,7 +5,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 /*
 
 #include <linux/interrupt.h>
 #include <linux/sched.h>
-#include <linux/byteorder/generic.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
 #include <asm/sn/sn_sal.h>
+#include <asm/unaligned.h>
 #include "snsc.h"
 
 static struct subch_data_s *event_sd;
@@ -35,7 +37,7 @@ DECLARE_TASKLET(sn_sysctl_event, scdrv_event, 0);
  * destination.
  */
 static irqreturn_t
-scdrv_event_interrupt(int irq, void *subch_data, struct pt_regs *regs)
+scdrv_event_interrupt(int irq, void *subch_data)
 {
        struct subch_data_s *sd = subch_data;
        unsigned long flags;
@@ -64,11 +66,11 @@ scdrv_parse_event(char *event, int *src, int *code, int *esp_code, char *desc)
        char *desc_end;
 
        /* record event source address */
-       *src = be32_to_cpup((__be32 *)event);
+       *src = get_unaligned_be32(event);
        event += 4;                     /* move on to event code */
 
        /* record the system controller's event code */
-       *code = be32_to_cpup((__be32 *)event);
+       *code = get_unaligned_be32(event);
        event += 4;                     /* move on to event arguments */
 
        /* how many arguments are in the packet? */
@@ -82,7 +84,7 @@ scdrv_parse_event(char *event, int *src, int *code, int *esp_code, char *desc)
                /* not an integer argument, so give up */
                return -1;
        }
-       *esp_code = be32_to_cpup((__be32 *)event);
+       *esp_code = get_unaligned_be32(event);
        event += 4;
 
        /* parse out the event description */
@@ -182,7 +184,8 @@ scdrv_event_severity(int code)
 static void
 scdrv_dispatch_event(char *event, int len)
 {
-       int code, esp_code, src;
+       static int snsc_shutting_down = 0;
+       int code, esp_code, src, class;
        char desc[CHUNKSIZE];
        char *severity;
 
@@ -194,25 +197,25 @@ scdrv_dispatch_event(char *event, int len)
        /* how urgent is the message? */
        severity = scdrv_event_severity(code);
 
-       if ((code & EV_CLASS_MASK) == EV_CLASS_PWRD_NOTIFY) {
-               struct task_struct *p;
+       class = (code & EV_CLASS_MASK);
 
-               /* give a SIGPWR signal to init proc */
+       if (class == EV_CLASS_PWRD_NOTIFY || code == ENV_PWRDN_PEND) {
+               if (snsc_shutting_down)
+                       return;
 
-               /* first find init's task */
-               read_lock(&tasklist_lock);
-               for_each_process(p) {
-                       if (p->pid == 1)
-                               break;
-               }
-               if (p) { /* we found init's task */
-                       printk(KERN_EMERG "Power off indication received. Initiating power fail sequence...\n");
-                       force_sig(SIGPWR, p);
-               } else { /* failed to find init's task - just give message(s) */
-                       printk(KERN_WARNING "Failed to find init proc to handle power off!\n");
-                       printk("%s|$(0x%x)%s\n", severity, esp_code, desc);
-               }
-               read_unlock(&tasklist_lock);
+               snsc_shutting_down = 1;
+
+               /* give a message for each type of event */
+               if (class == EV_CLASS_PWRD_NOTIFY)
+                       printk(KERN_NOTICE "Power off indication received."
+                              " Sending SIGPWR to init...\n");
+               else if (code == ENV_PWRDN_PEND)
+                       printk(KERN_CRIT "WARNING: Shutting down the system"
+                              " due to a critical environmental condition."
+                              " Sending SIGPWR to init...\n");
+
+               /* give a SIGPWR signal to init proc */
+               kill_cad_pid(SIGPWR, 0);
        } else {
                /* print to system log */
                printk("%s|$(0x%x)%s\n", severity, esp_code, desc);
@@ -266,15 +269,14 @@ scdrv_event_init(struct sysctl_data_s *scd)
 {
        int rv;
 
-       event_sd = kmalloc(sizeof (struct subch_data_s), GFP_KERNEL);
+       event_sd = kzalloc(sizeof (struct subch_data_s), GFP_KERNEL);
        if (event_sd == NULL) {
                printk(KERN_WARNING "%s: couldn't allocate subchannel info"
-                      " for event monitoring\n", __FUNCTION__);
+                      " for event monitoring\n", __func__);
                return;
        }
 
        /* initialize subch_data_s fields */
-       memset(event_sd, 0, sizeof (struct subch_data_s));
        event_sd->sd_nasid = scd->scd_nasid;
        spin_lock_init(&event_sd->sd_rlock);
 
@@ -284,21 +286,19 @@ scdrv_event_init(struct sysctl_data_s *scd)
        if (event_sd->sd_subch < 0) {
                kfree(event_sd);
                printk(KERN_WARNING "%s: couldn't open event subchannel\n",
-                      __FUNCTION__);
+                      __func__);
                return;
        }
 
        /* hook event subchannel up to the system controller interrupt */
        rv = request_irq(SGI_UART_VECTOR, scdrv_event_interrupt,
-                        SA_SHIRQ | SA_INTERRUPT,
+                        IRQF_SHARED | IRQF_DISABLED,
                         "system controller events", event_sd);
        if (rv) {
                printk(KERN_WARNING "%s: irq request failed (%d)\n",
-                      __FUNCTION__, rv);
+                      __func__, rv);
                ia64_sn_irtr_close(event_sd->sd_nasid, event_sd->sd_subch);
                kfree(event_sd);
                return;
        }
 }
-
-