Jonathan Avila
5a2f4ce3fa
PM / devfreq: Introduce a sysfs lock ...
Currently, concurrent writes to sysfs entries leave the possibility for
race conditions within the devfreq framework. For example, concurrently
executing max_freq_store and governor_store can result in attempting to
perform an update_devfreq() before the new governor's start handler can be
executed.
A more concrete case is a race between polling_interval_store and
governor_store. Because no lock is used after calling into the event
handler of the old governor and there's nothing preventing work from being
queued after the monitor is stopped, it's possible to accidentally cause
delayed work to be queued on the governor being switched to. This can be
seen if you create two threads, one which changes a device's governor
between simple_ondemand and performance, and one which changes its polling
interval between 45 and 50.
All of these races can be addressed with the introduction of a lock that
prevents sysfs operations from interleaving in this fashion.
Change-Id: Ia6887dcb2d69dc2576837a6c09fed55a28943abc
Signed-off-by: Jonathan Avila <avilaj@codeaurora.org>
2018-04-11 13:28:37 -07:00
PM / devfreq: exynos-nocp: Remove redundant code
2016-10-10 23:56:22 +02:00
PM / devfreq: memlat: Add support for compute-bound logic
2017-11-06 15:03:02 -08:00
PM / devfreq: disable certain interrupts events
2018-01-10 14:26:59 +05:30
PM / devfreq: make devfreq-event explicitly non-modular
2016-07-06 13:11:22 +09:00
PM / devfreq: Introduce a sysfs lock
2018-04-11 13:28:37 -07:00
PM / devfreq: devbw: Add suspend/resume APIs
2017-03-21 16:51:49 -07:00
devfreq: simple-dev: Make the freq-table property optional
2017-06-15 18:12:35 -07:00
devfreq: spdm: Add snapshot of devfreq-spdm driver
2017-12-18 21:32:14 -08:00
devfreq: spdm: Add snapshot of devfreq-spdm driver
2017-12-18 21:32:14 -08:00
dev_freq: devfreq_spdm: add null terminator to prevent OOB access
2018-02-26 08:38:17 -08:00
msm: kgsl: Add GPU bus governor from the msm-4.4 to msm-4.9
2017-04-12 15:28:42 -07:00
PM / devfreq: exynos-bus: Fix the wrong return value
2017-01-26 08:24:44 +01:00
PM / devfreq: Fix wrong trans_stat of passive devfreq device
2017-03-12 06:41:44 +01:00
PM / devfreq: bw_hwmon: use unsigned parameter for bytes_to_mbps
2018-03-05 15:03:04 +08:00
PM / devfreq: bw_hwmon: Add HW offload support to governor
2017-03-28 18:11:16 -07:00
msm: kgsl: Add GPU devfreq files from the msm-4.4 to v4.9
2017-01-19 16:06:16 -08:00
PM / devfreq: governor_cache_hwmon: Fix race in monitor start/stop
2017-03-28 17:52:50 -07:00
PM / devfreq: cache_hwmon: Use array for reporting monitor stats
2017-03-28 17:51:35 -07:00
PM / devfreq: governor_cpufreq: Rewrite locking to avoid deadlocks
2017-03-28 17:51:50 -07:00
msm: kgsl: Add GPU bus governor from the msm-4.4 to msm-4.9
2017-04-12 15:28:42 -07:00
PM / devfreq: memlat: Add support for compute-bound logic
2017-11-06 15:03:02 -08:00
PM / devfreq: memlat: Add support for compute-bound logic
2017-11-06 15:03:02 -08:00
adreno_tz: Correct tz_buf pointer type to correct pointer arithmetic
2017-07-06 13:14:50 +05:30
PM / devfreq: Fix wrong trans_stat of passive devfreq device
2017-03-12 06:41:44 +01:00
PM / devfreq: fix scaling down logic for simple clock scaling
2016-08-15 21:01:35 -07:00
devfreq: spdm: Fix for rpm creat request err
2018-01-04 17:42:54 +08:00
devfreq: spdm: Add snapshot of devfreq-spdm driver
2017-12-18 21:32:14 -08:00
PM / devfreq: Introduce M4M cache hwmon device
2017-03-28 17:53:06 -07:00
devfreq: spdm: Add snapshot of devfreq-spdm driver
2017-12-18 21:32:14 -08:00
PM / devfreq: msmcci-hwmon: Add support for handling shared irq
2017-03-28 17:53:51 -07:00
PM / devfreq: rk3399_dmc: Remove explictly regulator_put call in .remove
2016-09-19 13:36:20 +02:00
PM / devfreq: tegra: Set freq in rate callback
2016-02-23 14:27:42 +09:00
5a2f4ce3fa