Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6

[sfrench/cifs-2.6.git] / kernel / power / user.c

diff --git a/kernel/power/user.c b/kernel/power/user.c
index 5e866e07855023180f7126df069c2838cba138f5..f5512cb3aa86f61e98caec04c82a01a0dc9f6dcf 100644 (file)
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -40,6 +40,16 @@
 #define PMOPS_ENTER    2
 #define PMOPS_FINISH   3
 
+/*
+ * NOTE: The following ioctl definitions are wrong and have been replaced with
+ * correct ones.  They are only preserved here for compatibility with existing
+ * userland utilities and will be removed in the future.
+ */
+#define SNAPSHOT_ATOMIC_SNAPSHOT       _IOW(SNAPSHOT_IOC_MAGIC, 3, void *)
+#define SNAPSHOT_SET_IMAGE_SIZE                _IOW(SNAPSHOT_IOC_MAGIC, 6, unsigned long)
+#define SNAPSHOT_AVAIL_SWAP            _IOR(SNAPSHOT_IOC_MAGIC, 7, void *)
+#define SNAPSHOT_GET_SWAP_PAGE         _IOR(SNAPSHOT_IOC_MAGIC, 8, void *)
+
 
 #define SNAPSHOT_MINOR 231
 
@@ -57,6 +67,7 @@ atomic_t snapshot_device_available = ATOMIC_INIT(1);
 static int snapshot_open(struct inode *inode, struct file *filp)
 {
        struct snapshot_data *data;
+       int error;
 
        if (!atomic_add_unless(&snapshot_device_available, -1, 0))
                return -EBUSY;
@@ -77,9 +88,19 @@ static int snapshot_open(struct inode *inode, struct file *filp)
                data->swap = swsusp_resume_device ?
                        swap_type_of(swsusp_resume_device, 0, NULL) : -1;
                data->mode = O_RDONLY;
+               error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+               if (error)
+                       pm_notifier_call_chain(PM_POST_RESTORE);
        } else {
                data->swap = -1;
                data->mode = O_WRONLY;
+               error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
+               if (error)
+                       pm_notifier_call_chain(PM_POST_HIBERNATION);
+       }
+       if (error) {
+               atomic_inc(&snapshot_device_available);
+               return error;
        }
        data->frozen = 0;
        data->ready = 0;
@@ -101,6 +122,8 @@ static int snapshot_release(struct inode *inode, struct file *filp)
                thaw_processes();
                mutex_unlock(&pm_mutex);
        }
+       pm_notifier_call_chain(data->mode == O_WRONLY ?
+                       PM_POST_HIBERNATION : PM_POST_RESTORE);
        atomic_inc(&snapshot_device_available);
        return 0;
 }
@@ -164,18 +187,13 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                if (data->frozen)
                        break;
                mutex_lock(&pm_mutex);
-               error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
-               if (!error) {
-                       printk("Syncing filesystems ... ");
-                       sys_sync();
-                       printk("done.\n");
-
-                       error = freeze_processes();
-                       if (error)
-                               thaw_processes();
-               }
+               printk("Syncing filesystems ... ");
+               sys_sync();
+               printk("done.\n");
+
+               error = freeze_processes();
                if (error)
-                       pm_notifier_call_chain(PM_POST_HIBERNATION);
+                       thaw_processes();
                mutex_unlock(&pm_mutex);
                if (!error)
                        data->frozen = 1;
@@ -186,11 +204,11 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                        break;
                mutex_lock(&pm_mutex);
                thaw_processes();
-               pm_notifier_call_chain(PM_POST_HIBERNATION);
                mutex_unlock(&pm_mutex);
                data->frozen = 0;
                break;
 
+       case SNAPSHOT_CREATE_IMAGE:
        case SNAPSHOT_ATOMIC_SNAPSHOT:
                if (data->mode != O_RDONLY || !data->frozen  || data->ready) {
                        error = -EPERM;
@@ -198,7 +216,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                }
                error = hibernation_snapshot(data->platform_support);
                if (!error)
-                       error = put_user(in_suspend, (unsigned int __user *)arg);
+                       error = put_user(in_suspend, (int __user *)arg);
                if (!error)
                        data->ready = 1;
                break;
@@ -219,6 +237,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                data->ready = 0;
                break;
 
+       case SNAPSHOT_PREF_IMAGE_SIZE:
        case SNAPSHOT_SET_IMAGE_SIZE:
                image_size = arg;
                break;
@@ -233,12 +252,14 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                error = put_user(size, (loff_t __user *)arg);
                break;
 
+       case SNAPSHOT_AVAIL_SWAP_SIZE:
        case SNAPSHOT_AVAIL_SWAP:
                size = count_swap_pages(data->swap, 1);
                size <<= PAGE_SHIFT;
                error = put_user(size, (loff_t __user *)arg);
                break;
 
+       case SNAPSHOT_ALLOC_SWAP_PAGE:
        case SNAPSHOT_GET_SWAP_PAGE:
                if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {
                        error = -ENODEV;
@@ -247,7 +268,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                offset = alloc_swapdev_block(data->swap);
                if (offset) {
                        offset <<= PAGE_SHIFT;
-                       error = put_user(offset, (sector_t __user *)arg);
+                       error = put_user(offset, (loff_t __user *)arg);
                } else {
                        error = -ENOSPC;
                }