[PARISC] Work around machines which do not support chassis warnings
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>
diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
index 51e86c0..d47ba1aa 100644
--- a/arch/parisc/kernel/pdc_chassis.c
+++ b/arch/parisc/kernel/pdc_chassis.c
@@ -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 @@
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 __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;