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| author | Samuel Zhang <guoqing.zhang@amd.com> | 2025-07-10 09:23:12 +0300 |
|---|---|---|
| committer | Mario Limonciello <mario.limonciello@amd.com> | 2025-07-10 18:49:45 +0300 |
| commit | c2aaddbd2deded9d3301f1bafed242a0f71baba8 (patch) | |
| tree | 78d89591df1dffc4c7eb50afb68c81f02afc8043 /include/linux | |
| parent | 2640e819474f4a9ec78aa3cdb9063e4b5cf18ae4 (diff) | |
| download | linux-c2aaddbd2deded9d3301f1bafed242a0f71baba8.tar.xz | |
PM: hibernate: add new api pm_hibernate_is_recovering()
dev_pm_ops.thaw() is called in following cases:
* normal case: after hibernation image has been created.
* error case 1: creation of a hibernation image has failed.
* error case 2: restoration from a hibernation image has failed.
For normal case, it is called mainly for resume storage devices for
saving the hibernation image. Other devices that are not involved
in the image saving do not need to resume the device. But since there's
no api to know which case thaw() is called, device drivers can't
conditionally resume device in thaw().
The new pm_hibernate_is_recovering() is such a api to query if thaw() is
called in normal case.
Signed-off-by: Samuel Zhang <guoqing.zhang@amd.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20250710062313.3226149-5-guoqing.zhang@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/suspend.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h index b1c76c8f2c82..293137210fdf 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -426,6 +426,8 @@ int is_hibernate_resume_dev(dev_t dev); static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } #endif +bool pm_hibernate_is_recovering(void); + /* Hibernation and suspend events */ #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ |