[PATCH 1/1] dm: Deletion of unnecessary checks before two function calls

SF Markus Elfring
2014-11-19T20:55:27Z

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Wed, 19 Nov 2014 21:48:10 +0100

The functions dm_table_destroy() and vfree() perform also input
parameter validation. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/md/dm-ioctl.c | 3 +--
drivers/md/dm-snap-persistent.c | 12 ++++--------
2 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 5152142..0b925a4 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1050,8 +1050,7 @@ static int do_resume(struct dm_ioctl *param)
* Since dm_swap_table synchronizes RCU, nobody should be in
* read-side critical section already.
*/
- if (old_map)
- dm_table_destroy(old_map);
+ dm_table_destroy(old_map);

if (!r)
__dev_status(md, param);
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index d6e8817..4b29bac 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -200,16 +200,13 @@ err_area:

static void free_area(struct pstore *ps)
{
- if (ps->area)
- vfree(ps->area);
+ vfree(ps->area);
ps->area = NULL;

- if (ps->zero_area)
- vfree(ps->zero_area);
+ vfree(ps->zero_area);
ps->zero_area = NULL;

- if (ps->header_area)
- vfree(ps->header_area);
+ vfree(ps->header_area);
ps->header_area = NULL;
}

@@ -605,8 +602,7 @@ static void persistent_dtr(struct dm_exception_store *store)
free_area(ps);

/* Allocated in persistent_read_metadata */
- if (ps->callbacks)
- vfree(ps->callbacks);
+ vfree(ps->callbacks);

kfree(ps);
}
--
2.1.3