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 3.14-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-3.14 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 @@ -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'; } Patches currently in stable-queue which might be from thomas.schlichter@xxxxxx are queue-3.14/cpuidle-remove-state_count-field-from-struct-cpuidle_device.patch queue-3.14/cpuidle-acpi-do-not-overwrite-name-and-description-of-c0.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html