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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-05-15 23:29:57 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-05-16 12:18:27 +0200 |
| commit | 1f0b63866fc1be700260547be8edf8e6f0af37f2 (patch) | |
| tree | 19834a42634cdc86a0addca25d1f71cbf408b273 /include/linux/suspend.h | |
| parent | ACPI / PM: Export acpi_target_system_state() to modules (diff) | |
| download | linux-dev-1f0b63866fc1be700260547be8edf8e6f0af37f2.tar.xz linux-dev-1f0b63866fc1be700260547be8edf8e6f0af37f2.zip | |
ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state
The "freeze" sleep state suffers from the same issue that was
addressed by commit ad07277e82de (ACPI / PM: Hold acpi_scan_lock over
system PM transitions) for ACPI sleep states, that is, things break
if ->remove() is called for devices whose system resume callbacks
haven't been executed yet.
It also can be addressed in the same way, by holding the ACPI scan
lock over the "freeze" sleep state and PM transitions to and from
that state, but ->begin() and ->end() platform operations for the
"freeze" sleep state are needed for this purpose.
This change has been tested on Acer Aspire S5 with Thunderbolt.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/suspend.h')
| -rw-r--r-- | include/linux/suspend.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h index f73cabf59012..91d66fd8dce1 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -187,6 +187,11 @@ struct platform_suspend_ops { void (*recover)(void); }; +struct platform_freeze_ops { + int (*begin)(void); + void (*end)(void); +}; + #ifdef CONFIG_SUSPEND /** * suspend_set_ops - set platform dependent suspend operations @@ -194,6 +199,7 @@ struct platform_suspend_ops { */ extern void suspend_set_ops(const struct platform_suspend_ops *ops); extern int suspend_valid_only_mem(suspend_state_t state); +extern void freeze_set_ops(const struct platform_freeze_ops *ops); extern void freeze_wake(void); /** @@ -220,6 +226,7 @@ extern int pm_suspend(suspend_state_t state); static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } +static inline void freeze_set_ops(const struct platform_freeze_ops *ops) {} static inline void freeze_wake(void) {} #endif /* !CONFIG_SUSPEND */ |