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authorThibaut Varene <varenet@parisc-linux.org>2006-05-04 09:29:32 -0600
committerKyle McMartin <kyle@hera.kernel.org>2006-06-27 23:28:37 +0000
commit9b0703fed7ca1af95d4454f45e2f25733f0afa76 (patch)
tree28a9dff1a9747e4f58fbe25dc99d85c9fa86c54d /arch
parent8ffaeaf42e91930888df09d696a8a6ebe056d0e0 (diff)
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/parisc/kernel/pdc_chassis.c44
1 files changed, 24 insertions, 20 deletions
diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
index 51e86c0365c..d47ba1aa825 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 @@ 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;
- }
-
- if (handle) {
- /* 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);
- }
+ printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
+ is_pdc_pat() ? "PDC_PAT" : "regular",
+ PDC_CHASSIS_VER);
+
+ /* 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);
}
#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;