diff options
Diffstat (limited to 'kernel/power/user.c')
| -rw-r--r-- | kernel/power/user.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c index 75c959de4b29..2d8b60a3c86b 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -186,6 +186,11 @@ static ssize_t snapshot_write(struct file *filp, const char __user *buf, res = PAGE_SIZE - pg_offp; } + if (!data_of(data->handle)) { + res = -EINVAL; + goto unlock; + } + res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp, buf, count); if (res > 0) @@ -211,7 +216,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (!mutex_trylock(&pm_mutex)) + if (!mutex_trylock(&system_transition_mutex)) return -EBUSY; lock_device_hotplug(); @@ -389,7 +394,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, } unlock_device_hotplug(); - mutex_unlock(&pm_mutex); + mutex_unlock(&system_transition_mutex); return error; } |