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| author |   Pavel Machek <pavel@suse.cz> | 2006-01-22 22:38:52 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2006-02-06 12:17:17 -0800 |
| commit | 022f7b07bf2b384ece7fbd7edb90e54cd78db252 (patch) | |
| tree | 7eae52ca103253babb194b8bae92c15340d82c0b /drivers/base/power/sysfs.c | |
| parent | [PATCH] IB: fix up major/minor sysfs interface for IB core (diff) | |
| download | linux-dev-022f7b07bf2b384ece7fbd7edb90e54cd78db252.tar.xz linux-dev-022f7b07bf2b384ece7fbd7edb90e54cd78db252.zip | |
[PATCH] Fix Userspace interface breakage in power/state
Prevent passing invalid values down to the drivers.
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to '')
| -rw-r--r-- | drivers/base/power/sysfs.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index f3a0c562bcb5..40d7242a07c1 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -27,22 +27,30 @@ static ssize_t state_show(struct device * dev, struct device_attribute *attr, char * buf) { - return sprintf(buf, "%u\n", dev->power.power_state.event); + if (dev->power.power_state.event) + return sprintf(buf, "2\n"); + else + return sprintf(buf, "0\n"); } static ssize_t state_store(struct device * dev, struct device_attribute *attr, const char * buf, size_t n) { pm_message_t state; - char * rest; - int error = 0; + int error = -EINVAL; - state.event = simple_strtoul(buf, &rest, 10); - if (*rest) - return -EINVAL; - if (state.event) + state.event = PM_EVENT_SUSPEND; + /* Older apps expected to write "3" here - confused with PCI D3 */ + if ((n == 1) && !strcmp(buf, "3")) error = dpm_runtime_suspend(dev, state); - else + + if ((n == 1) && !strcmp(buf, "2")) + error = dpm_runtime_suspend(dev, state); + + if ((n == 1) && !strcmp(buf, "0")) { dpm_runtime_resume(dev); + error = 0; + } + return error ? error : n; } |