Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / drivers / char / snsc_event.c

diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
index d692af5..e234d50 100644 (file)
--- a/drivers/char/snsc_event.c
+++ b/drivers/char/snsc_event.c
@@ -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.
  */
 
 /*
@@ -19,6 +19,7 @@
 #include <linux/sched.h>
 #include <linux/byteorder/generic.h>
 #include <asm/sn/sn_sal.h>
+#include <asm/unaligned.h>
 #include "snsc.h"
 
 static struct subch_data_s *event_sd;
@@ -62,13 +63,16 @@ static int
 scdrv_parse_event(char *event, int *src, int *code, int *esp_code, char *desc)
 {
        char *desc_end;
+       __be32 from_buf;
 
        /* record event source address */
-       *src = be32_to_cpup((__be32 *)event);
+       from_buf = get_unaligned((__be32 *)event);
+       *src = be32_to_cpup(&from_buf);
        event += 4;                     /* move on to event code */
 
        /* record the system controller's event code */
-       *code = be32_to_cpup((__be32 *)event);
+       from_buf = get_unaligned((__be32 *)event);
+       *code = be32_to_cpup(&from_buf);
        event += 4;                     /* move on to event arguments */
 
        /* how many arguments are in the packet? */
@@ -82,7 +86,8 @@ 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);
+       from_buf = get_unaligned((__be32 *)event);
+       *esp_code = be32_to_cpup(&from_buf);
        event += 4;
 
        /* parse out the event description */
@@ -182,7 +187,8 @@ 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;
 
@@ -194,9 +200,25 @@ 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) {
+       class = (code & EV_CLASS_MASK);
+
+       if (class == EV_CLASS_PWRD_NOTIFY || code == ENV_PWRDN_PEND) {
                struct task_struct *p;
 
+               if (snsc_shutting_down)
+                       return;
+
+               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 */
 
                /* first find init's task */
@@ -205,12 +227,11 @@ scdrv_dispatch_event(char *event, int len)
                        if (p->pid == 1)
                                break;
                }
-               if (p) { /* we found init's task */
-                       printk(KERN_EMERG "Power off indication received. Initiating power fail sequence...\n");
+               if (p) {
                        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);
+               } else {
+                       printk(KERN_ERR "Failed to signal init!\n");
+                       snsc_shutting_down = 0; /* so can try again (?) */
                }
                read_unlock(&tasklist_lock);
        } else {
@@ -266,7 +287,7 @@ 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__);
@@ -274,7 +295,6 @@ scdrv_event_init(struct sysctl_data_s *scd)
        }
 
        /* 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);
 
@@ -300,5 +320,3 @@ scdrv_event_init(struct sysctl_data_s *scd)
                return;
        }
 }
-
-