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authorTony Luck <tony.luck@intel.com>2006-03-21 08:18:04 -0800
committerTony Luck <tony.luck@intel.com>2006-03-21 08:18:04 -0800
commit1f84253e3ce75fc1b2946a544e16c5c0c13c7017 (patch)
tree0e029f4cd2781ade35a603a540ee147091763694 /drivers/char
parent581249966ffeb0463bad1b0e087e1bb29ed53707 (diff)
parent28ff6b9b2fc01d2c2746c72ce8af1729344fae27 (diff)
Pull sn-handle-sc-powerdown into release branch
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/snsc.h5
-rw-r--r--drivers/char/snsc_event.c32
2 files changed, 28 insertions, 9 deletions
diff --git a/drivers/char/snsc.h b/drivers/char/snsc.h
index a9efc13cc85..8a98169b60c 100644
--- a/drivers/char/snsc.h
+++ b/drivers/char/snsc.h
@@ -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.
*/
/*
@@ -70,6 +70,9 @@ struct sysctl_data_s {
#define EV_CLASS_TEST_WARNING 0x6000ul
#define EV_CLASS_PWRD_NOTIFY 0x8000ul
+/* ENV class codes */
+#define ENV_PWRDN_PEND 0x4101ul
+
#define EV_SEVERITY_POWER_STABLE 0x0000ul
#define EV_SEVERITY_POWER_LOW_WARNING 0x0100ul
#define EV_SEVERITY_POWER_HIGH_WARNING 0x0200ul
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
index baaa365285f..a4fa507eed9 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.
*/
/*
@@ -187,7 +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;
@@ -199,9 +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 */
@@ -210,12 +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 {