This is a note to let you know that I've just added the patch titled
cpuidle: ACPI: do not overwrite name and description of C0
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cpuidle-acpi-do-not-overwrite-name-and-description-of-c0.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c7e8bdf5872c5a8f5a6494e16fe839c38a0d3d3d Mon Sep 17 00:00:00 2001
From: Thomas Schlichter <thomas.schlichter@xxxxxx>
Date: Tue, 31 Mar 2015 20:24:39 +0200
Subject: cpuidle: ACPI: do not overwrite name and description of C0
From: Thomas Schlichter <thomas.schlichter@xxxxxx>
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@xxxxxx>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -978,7 +978,7 @@ 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';
}
Patches currently in stable-queue which might be from thomas.schlichter@xxxxxx are
queue-3.10/cpuidle-acpi-do-not-overwrite-name-and-description-of-c0.patch
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