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Subject[PATCH 2/7] Flush block device before reset
Date
Make sure we flush block device before freeing all metadata
during reset ioctl.

Signed-off-by: Nitin Gupta <ngupta@vflar.org>
---
drivers/staging/ramzswap/ramzswap_drv.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/ramzswap/ramzswap_drv.c b/drivers/staging/ramzswap/ramzswap_drv.c
index 05273c0..3567ee3 100644
--- 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;

--
1.6.2.5


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