Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.19 070/101] cpuidle: ACPI: do not overwrite name and description of C0 | Date | Fri, 17 Apr 2015 15:28:58 +0200 |
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3.19-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Schlichter <thomas.schlichter@web.de>
commit c7e8bdf5872c5a8f5a6494e16fe839c38a0d3d3d upstream.
Fix a bug that leads to showing the name and description of C-state C0 as "<null>" in sysfs after the ACPI C-states changed (e.g. after AC->DC or DC->AC transition).
The function poll_idle_init() in drivers/cpuidle/driver.c initializes the state 0 during cpuidle_register_driver(), so we better do not overwrite it again with '\0' during acpi_processor_cst_has_changed().
Signed-off-by: Thomas Schlichter <thomas.schlichter@web.de> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/acpi/processor_idle.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -962,7 +962,7 @@ static int acpi_processor_setup_cpuidle_ return -EINVAL; drv->safe_state_index = -1; - for (i = 0; i < CPUIDLE_STATE_MAX; i++) { + for (i = CPUIDLE_DRIVER_STATE_START; i < CPUIDLE_STATE_MAX; i++) { drv->states[i].name[0] = '\0'; drv->states[i].desc[0] = '\0'; }
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