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| author | Pavel Machek <pavel@ucw.cz> | 2005-11-29 19:34:37 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-29 19:47:03 -0800 |
| commit | 123d3c13e2853a11b4d599d754b356acb12886e2 (patch) | |
| tree | 6127e78c2dabcb2ca70de896b7aba53f12213d82 /kernel | |
| parent | d91b14c463306eb6527550ba48617e7f5500d3ae (diff) | |
| download | linux-123d3c13e2853a11b4d599d754b356acb12886e2.tar.gz | |
[PATCH] fix swsusp on machines not supporting S4
Fix swsusp on machines not supporting S4. With recent changes, it is not possible to trigger it using /sys filesystem. Swsusp does not really need any support from low-level code, it is possible to reboot or halt at the end of suspend. Signed-off-by: Pavel Machek <pavel@suse.cz> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/main.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 6ee2cad530e8..d253f3ae2fa5 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -24,7 +24,7 @@ DECLARE_MUTEX(pm_sem); -struct pm_ops * pm_ops = NULL; +struct pm_ops *pm_ops; suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN; /** @@ -151,6 +151,18 @@ static char *pm_states[PM_SUSPEND_MAX] = { #endif }; +static inline int valid_state(suspend_state_t state) +{ + /* Suspend-to-disk does not really need low-level support. + * It can work with reboot if needed. */ + if (state == PM_SUSPEND_DISK) + return 1; + + if (pm_ops && pm_ops->valid && !pm_ops->valid(state)) + return 0; + return 1; +} + /** * enter_state - Do common work of entering low-power state. @@ -167,7 +179,7 @@ static int enter_state(suspend_state_t state) { int error; - if (pm_ops && pm_ops->valid && !pm_ops->valid(state)) + if (!valid_state(state)) return -ENODEV; if (down_trylock(&pm_sem)) return -EBUSY; @@ -238,9 +250,8 @@ static ssize_t state_show(struct subsystem * subsys, char * buf) char * s = buf; for (i = 0; i < PM_SUSPEND_MAX; i++) { - if (pm_states[i] && pm_ops && (!pm_ops->valid - ||(pm_ops->valid && pm_ops->valid(i)))) - s += sprintf(s,"%s ",pm_states[i]); + if (pm_states[i] && valid_state(i)) + s += sprintf(s,"%s ", pm_states[i]); } s += sprintf(s,"\n"); return (s - buf); |