Staging: ramzswap: Flush block device before reset

Make sure we flush block device before freeing all metadata
during reset ioctl.

Signed-off-by: Nitin Gupta <ngupta@vflar.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/ramzswap/ramzswap_drv.c b/drivers/staging/ramzswap/ramzswap_drv.c
index 05273c0..3567ee3 100644 (file)
--- a/drivers/staging/ramzswap/ramzswap_drv.c
+++ b/drivers/staging/ramzswap/ramzswap_drv.c
@@ -1000,6 +1000,9 @@ static void reset_device(struct ramzswap *rzs)
        unsigned entries_per_page;
        unsigned long num_table_pages, entry = 0;
 
+       /* Do not accept any new I/O request */
+       rzs->init_done = 0;
+
        if (rzs->backing_swap && !rzs->num_extents)
                is_backing_blkdev = 1;
 
@@ -1073,9 +1076,6 @@ static void reset_device(struct ramzswap *rzs)
 
        rzs->disksize = 0;
        rzs->memlimit = 0;
-
-       /* Back to uninitialized state */
-       rzs->init_done = 0;
 }
 
 static int ramzswap_ioctl_init_device(struct ramzswap *rzs)
@@ -1276,6 +1276,11 @@ static int ramzswap_ioctl(struct block_device *bdev, fmode_t mode,
                        ret = -EBUSY;
                        goto out;
                }
+
+               /* Make sure all pending I/O is finished */
+               if (bdev)
+                       fsync_bdev(bdev);
+
                ret = ramzswap_ioctl_reset_device(rzs);
                break;