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[PARISC] Work around machines which do not support chassis warnings

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pdc_chassis v0.05:

Some machines seems not to implement Chassis warn support. Work around these.
Also cleanup a bit of the code.

Signed-off-by: Thibaut VARENE <varenet@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Thibaut Varene 2006-05-04 09:29:32 -06:00 committed by Kyle McMartin
parent 8ffaeaf42e
commit 9b0703fed7
1 changed files with 22 additions and 18 deletions
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40
arch/parisc/kernel/pdc_chassis.c
View file

@ -19,6 +19,7 @@
*
* TODO: poll chassis warns, trigger (configurable) machine shutdown when
* needed.
* Find out how to get Chassis warnings out of PAT boxes?
*/
#undef PDC_CHASSIS_DEBUG
@ -40,6 +41,7 @@
#include <asm/pdc.h>
#include <asm/pdcpat.h>
#define PDC_CHASSIS_VER "0.05"
#ifdef CONFIG_PDC_CHASSIS
static unsigned int pdc_chassis_enabled __read_mostly = 1;
@ -133,29 +135,20 @@ static struct notifier_block pdc_chassis_reboot_block = {
void __init parisc_pdc_chassis_init(void)
{
#ifdef CONFIG_PDC_CHASSIS
int handle = 0;
if (likely(pdc_chassis_enabled)) {
DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
/* Let see if we have something to handle... */
/* Check for PDC_PAT */
if (is_pdc_pat()) {
printk(KERN_INFO "Enabling PDC_PAT chassis codes support.\n");
handle = 1;
}
else {
printk(KERN_INFO "Enabling regular chassis codes support.\n");
handle = 1;
}
printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
is_pdc_pat() ? "PDC_PAT" : "regular",
PDC_CHASSIS_VER);
if (handle) {
/* initialize panic notifier chain */
atomic_notifier_chain_register(&panic_notifier_list,
&pdc_chassis_panic_block);
/* initialize panic notifier chain */
atomic_notifier_chain_register(&panic_notifier_list,
&pdc_chassis_panic_block);
/* initialize reboot notifier chain */
register_reboot_notifier(&pdc_chassis_reboot_block);
}
/* initialize reboot notifier chain */
register_reboot_notifier(&pdc_chassis_reboot_block);
}
#endif /* CONFIG_PDC_CHASSIS */
}
@ -285,7 +278,18 @@ static int pdc_chassis_warn_pread(char *page, char **start, off_t off,
static int __init pdc_chassis_create_procfs(void)
{
printk(KERN_INFO "Enabling PDC chassis warnings support.\n");
unsigned long test;
int ret;
ret = pdc_chassis_warn(&test);
if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
/* seems that some boxes (eg L1000) do not implement this */
printk(KERN_INFO "Chassis warnings not supported.\n");
return 0;
}
printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
PDC_CHASSIS_VER);
create_proc_read_entry("chassis", 0400, NULL, pdc_chassis_warn_pread,
NULL);
return 0;