Kant Fan 876c6ab967 PM/devfreq: governor: Add a private governor_data for governor ... commit 5fdded8448 upstream. The member void *data in the structure devfreq can be overwrite by governor_userspace. For example: 1. The device driver assigned the devfreq governor to simple_ondemand by the function devfreq_add_device() and init the devfreq member void *data to a pointer of a static structure devfreq_simple_ondemand_data by the function devfreq_add_device(). 2. The user changed the devfreq governor to userspace by the command "echo userspace > /sys/class/devfreq/.../governor". 3. The governor userspace alloced a dynamic memory for the struct userspace_data and assigend the member void *data of devfreq to this memory by the function userspace_init(). 4. The user changed the devfreq governor back to simple_ondemand by the command "echo simple_ondemand > /sys/class/devfreq/.../governor". 5. The governor userspace exited and assigned the member void *data in the structure devfreq to NULL by the function userspace_exit(). 6. The governor simple_ondemand fetched the static information of devfreq_simple_ondemand_data in the function devfreq_simple_ondemand_func() but the member void *data of devfreq was assigned to NULL by the function userspace_exit(). 7. The information of upthreshold and downdifferential is lost and the governor simple_ondemand can't work correctly. The member void *data in the structure devfreq is designed for a static pointer used in a governor and inited by the function devfreq_add_device(). This patch add an element named governor_data in the devfreq structure which can be used by a governor(E.g userspace) who want to assign a private data to do some private things. Fixes: ce26c5bb95 ("PM / devfreq: Add basic governors") Cc: stable@vger.kernel.org # 5.10+ Reviewed-by: Chanwoo Choi <cwchoi00@gmail.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kant Fan <kant@allwinnertech.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-01-12 11:58:51 +01:00
..
event	PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events	2022-07-07 17:53:27 +02:00
devfreq-event.c
devfreq.c	PM/devfreq: governor: Add a private governor_data for governor	2023-01-12 11:58:51 +01:00
exynos-bus.c	Merge branches 'pm-devfreq' and 'pm-tools'	2020-12-15 15:27:16 +01:00
governor.h	PM / devfreq: Remove the invalid description for get_target_freq	2021-04-08 13:14:51 +09:00
governor_passive.c	PM / devfreq: passive: Fix get_target_freq when not using required-opp	2021-06-24 10:37:35 +09:00
governor_performance.c
governor_powersave.c
governor_simpleondemand.c
governor_userspace.c	PM/devfreq: governor: Add a private governor_data for governor	2023-01-12 11:58:51 +01:00
imx-bus.c	PM / devfreq: imx-bus: Remove imx_bus_get_dev_status	2021-05-21 13:16:10 +09:00
imx8m-ddrc.c	PM / devfreq: imx8m-ddrc: Remove unneeded of_match_ptr()	2021-04-08 13:14:51 +09:00
Kconfig	PM / devfreq: imx8m-ddrc: Remove DEVFREQ_GOV_SIMPLE_ONDEMAND dependency	2021-05-21 13:16:21 +09:00
Makefile	PM / devfreq: tegra20: Deprecate in a favor of emc-stat based driver	2020-11-23 16:01:13 +09:00
rk3399_dmc.c	PM / devfreq: rk3399_dmc: Disable edev on remove()	2022-06-09 10:22:41 +02:00
tegra30-devfreq.c	PM / devfreq: tegra30: Support thermal cooling	2021-05-21 13:16:10 +09:00