X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fchar%2Fsnsc_event.c;h=e234d50e142a027290b63aa2860841f274db2a8b;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=d692af57213a7cbfac0a7e884749c94a35fb4b73;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
index d692af572..e234d50e1 100644
--- 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;
 	}
 }
-
-