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-rw-r--r--kernel/power/user.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 72e8f4f..957f061 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -39,6 +39,7 @@ static struct snapshot_data {
char frozen;
char ready;
char platform_support;
+ bool free_bitmaps;
} snapshot_state;
atomic_t snapshot_device_available = ATOMIC_INIT(1);
@@ -82,6 +83,10 @@ static int snapshot_open(struct inode *inode, struct file *filp)
data->swap = -1;
data->mode = O_WRONLY;
error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+ if (!error) {
+ error = create_basic_memory_bitmaps();
+ data->free_bitmaps = !error;
+ }
if (error)
pm_notifier_call_chain(PM_POST_RESTORE);
}
@@ -111,6 +116,8 @@ static int snapshot_release(struct inode *inode, struct file *filp)
pm_restore_gfp_mask();
free_basic_memory_bitmaps();
thaw_processes();
+ } else if (data->free_bitmaps) {
+ free_basic_memory_bitmaps();
}
pm_notifier_call_chain(data->mode == O_RDONLY ?
PM_POST_HIBERNATION : PM_POST_RESTORE);
@@ -231,6 +238,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
break;
pm_restore_gfp_mask();
free_basic_memory_bitmaps();
+ data->free_bitmaps = false;
thaw_processes();
data->frozen = 0;
break;
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