linux/kernel/power, branch v4.2

Merge tag 'pm+acpi-4.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2015-07-01T21:17:44Z

Pull power management and ACPI fixes from Rafael Wysocki: "These are fixes that didn't make it to the previous PM+ACPI pull request or are fixing issues introduced by it. Specifics: - Fix a recently added memory leak in an error path in the ACPI resources management code (Dan Carpenter) - Fix a build warning triggered by an ACPI video header function that should be static inline (Borislav Petkov) - Change names of helper function converting struct fwnode_handle pointers to either struct device_node or struct acpi_device pointers so they don't conflict with local variable names (Alexander Sverdlin) - Make the hibernate core re-enable nonboot CPUs on failures to disable them as expected (Vitaly Kuznetsov) - Increase the default timeout of the device suspend watchdog to prevent it from triggering too early on some systems (Takashi Iwai) - Prevent the cpuidle powernv driver from registering idle states with CPUIDLE_FLAG_TIMER_STOP set if CONFIG_TICK_ONESHOT is unset which leads to boot hangs (Preeti U Murthy)" * tag 'pm+acpi-4.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in periodic mode PM / sleep: Increase default DPM watchdog timeout to 60 PM / hibernate: re-enable nonboot cpus on disable_nonboot_cpus() failure ACPI / OF: Rename of_node() and acpi_node() to to_of_node() and to_acpi_node() ACPI / video: Inline acpi_video_set_dmi_backlight_type ACPI / resources: free memory on error in add_region_before()

Merge branch 'for-4.2/core' of git://git.kernel.dk/linux-block

2015-06-25T21:29:53Z

Pull core block IO update from Jens Axboe: "Nothing really major in here, mostly a collection of smaller optimizations and cleanups, mixed with various fixes. In more detail, this contains: - Addition of policy specific data to blkcg for block cgroups. From Arianna Avanzini. - Various cleanups around command types from Christoph. - Cleanup of the suspend block I/O path from Christoph. - Plugging updates from Shaohua and Jeff Moyer, for blk-mq. - Eliminating atomic inc/dec of both remaining IO count and reference count in a bio. From me. - Fixes for SG gap and chunk size support for data-less (discards) IO, so we can merge these better. From me. - Small restructuring of blk-mq shared tag support, freeing drivers from iterating hardware queues. From Keith Busch. - A few cfq-iosched tweaks, from Tahsin Erdogan and me. Makes the IOPS mode the default for non-rotational storage" * 'for-4.2/core' of git://git.kernel.dk/linux-block: (35 commits) cfq-iosched: fix other locations where blkcg_to_cfqgd() can return NULL cfq-iosched: fix sysfs oops when attempting to read unconfigured weights cfq-iosched: move group scheduling functions under ifdef cfq-iosched: fix the setting of IOPS mode on SSDs blktrace: Add blktrace.c to BLOCK LAYER in MAINTAINERS file block, cgroup: implement policy-specific per-blkcg data block: Make CFQ default to IOPS mode on SSDs block: add blk_set_queue_dying() to blkdev.h blk-mq: Shared tag enhancements block: don't honor chunk sizes for data-less IO block: only honor SG gap prevention for merges that contain data block: fix returnvar.cocci warnings block, dm: don't copy bios for request clones block: remove management of bi_remaining when restoring original bi_end_io block: replace trylock with mutex_lock in blkdev_reread_part() block: export blkdev_reread_part() and __blkdev_reread_part() suspend: simplify block I/O handling block: collapse bio bit space block: remove unused BIO_RW_BLOCK and BIO_EOF flags block: remove BIO_EOPNOTSUPP ...

PM / sleep: Increase default DPM watchdog timeout to 60

2015-06-24T22:35:16Z

Many harddisks (mostly WD ones) have firmware problems and take too long, more than 10 seconds, to resume from suspend. And this often exceeds the default DPM watchdog timeout (12 seconds), resulting in a kernel panic out of sudden. Since most distros just take the default as is, we should give a bit more safer value. This patch increases the default value from 12 seconds to one minute, which has been confirmed to be long enough for such problematic disks. Link: https://bugzilla.kernel.org/show_bug.cgi?id=91921 Fixes: 70fea60d888d (PM / Sleep: Detect device suspend/resume lockup and log event) Cc: 3.13+ # 3.13+ Signed-off-by: Takashi Iwai Signed-off-by: Rafael J. Wysocki

PM / hibernate: re-enable nonboot cpus on disable_nonboot_cpus() failure

2015-06-24T21:48:44Z

When disable_nonboot_cpus() fails on some cpu it doesn't bring back all cpus it managed to offline, a consequent call to enable_nonboot_cpus() is expected. In hibernation_platform_enter() we don't call enable_nonboot_cpus() on error so cpus stay offlined. create_image() and resume_target_kernel() functions handle disable_nonboot_cpus() faults correctly, hibernation_platform_enter() is the only one which is doing it wrong. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Rafael J. Wysocki

suspend: simplify block I/O handling

2015-05-19T15:19:59Z

Stop abusing struct page functionality and the swap end_io handler, and instead add a modified version of the blk-lib.c bio_batch helpers. Also move the block I/O code into swap.c as they are directly tied into each other. Signed-off-by: Christoph Hellwig Tested-by: Pavel Machek Tested-by: Ming Lin Acked-by: Pavel Machek Acked-by: Rafael J. Wysocki Signed-off-by: Jens Axboe

PM / sleep: Return -EBUSY from suspend_enter() on wakeup detection

2015-05-19T00:26:56Z

If a wakeup source is found to be pending in the last stage of suspend after syscore suspend, then the machine won't suspend, but suspend_enter() will return 0. That is confusing, as wakeup detection elsewhere causes -EBUSY to be returned from suspend_enter(). To avoid the confusion, make suspend_enter() return -EBUSY in that case too. Signed-off-by: Ruchi Kandoi [ rjw: Subject and changelog ] Signed-off-by: Rafael J. Wysocki

PM / sleep: Fix symbol name in a comment in kernel/power/main.c

2015-05-13T13:31:12Z

Signed-off-by: Rafael J. Wysocki

PM / sleep: Refine diagnostic messages in enter_state()

2015-05-12T21:45:12Z

Some of the system suspend diagnostic messages related to suspend-to-idle refer to it as "freeze sleep" or "freeze state" while the others say "suspend-to-idle". To reduce the possible confusion that may result from that, refine the former either to say "suspend to idle" too or to make it clearer that what is printed is a state string written to /sys/power/state ("mem", "standby", or "freeze"). Signed-off-by: Rafael J. Wysocki

Merge back earlier suspend/hibernate material for v4.1.

2015-04-10T10:01:59Z

Revert "PM / hibernate: avoid unsafe pages in e820 reserved regions"

2015-04-06T23:13:23Z

Commit 84c91b7ae07c (PM / hibernate: avoid unsafe pages in e820 reserved regions) is reported to make resume from hibernation on Lenovo x230 unreliable, so revert it. We will revisit the issue the commit in question was supposed to fix in the future. Link: https://bugzilla.kernel.org/show_bug.cgi?id=96111 Reported-by: rhn Cc: 3.17+ # 3.17+ Signed-off-by: Rafael J. Wysocki