From: Marco Aurelio da Costa <costa@xxxxxxxxx>
[v3: Fixes suggested by Konrad]
Signed-off-by: Marco Aurelio da Costa <costa@xxxxxxxxx>
The EliteBook 8560W has non-initialized entries in its _PSS ACPI
table. Instead of bailing out when the first non-initialized entry is
found, ignore it and use only the valid entries. Only bail out if there
is no valid entry at all.
---
--- linux-3.3.3/drivers/acpi/processor_perflib.c.orig 2012-04-24
22:18:23.288041268 +0200
+++ linux-3.3.3/drivers/acpi/processor_perflib.c 2012-05-04
18:23:02.640111246 +0200
@@ -311,6 +311,7 @@ static int acpi_processor_get_performanc
struct acpi_buffer state = { 0, NULL };
union acpi_object *pss = NULL;
int i;
+ int last_invalid = -1;
status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
@@ -372,14 +373,33 @@ static int acpi_processor_get_performanc
((u32)(px->core_frequency * 1000) !=
(px->core_frequency * 1000))) {
printk(KERN_ERR FW_BUG PREFIX
- "Invalid BIOS _PSS frequency: 0x%llx MHz\n",
- px->core_frequency);
- result = -EFAULT;
- kfree(pr->performance->states);
- goto end;
+ "Invalid BIOS _PSS frequency found for processor %d: 0x%llx MHz\n",
+ pr->id, px->core_frequency);
+ if (last_invalid == -1)
+ last_invalid = i;
+ } else {
+ if (last_invalid != -1) {
+ /*
+ * Copy this valid entry over last_invalid entry
+ */
+ memcpy(&(pr->performance->states[last_invalid]),
+ px, sizeof(struct acpi_processor_px));
+ ++last_invalid;
+ }
}
}
+ if (last_invalid == 0) {
+ printk(KERN_ERR FW_BUG PREFIX
+ "No valid BIOS _PSS frequency found for processor %d\n", pr->id);
+ result = -EFAULT;
+ kfree(pr->performance->states);
+ pr->performance->states = NULL;
+ }
+
+ if (last_invalid > 0)
+ pr->performance->state_count = last_invalid;
+
end:
kfree(buffer.pointer);
--
Marco Costa
Customer Support
--
GAMIC mbH
Roermonder Strasse, 151
52072 Aachen
Germany
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