diff options
| author | Marco Aurelio da Costa <costa@gamic.com> | 2012-05-04 18:53:44 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-05-08 01:56:37 -0400 |
| commit | d8e725f356fd5f225ad97f21213fc007e409c9f5 (patch) | |
| tree | f4313d66f9331b4dd5bbd7f86aba948c17ea2990 | |
| parent | febb72a6e4cc6c8cffcc1ea649a3fb364f1ea432 (diff) | |
| download | linux-d8e725f356fd5f225ad97f21213fc007e409c9f5.tar.gz linux-d8e725f356fd5f225ad97f21213fc007e409c9f5.tar.bz2 linux-d8e725f356fd5f225ad97f21213fc007e409c9f5.zip | |
ACPI: Ignore invalid _PSS entries, but use valid ones
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.
[v3: Fixes suggested by Konrad]
Signed-off-by: Marco Aurelio da Costa <costa@gamic.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/processor_perflib.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index 0af48a8554cd..a093dc163a42 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -333,6 +333,7 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr) 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); @@ -394,14 +395,33 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr) ((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); |