dm snapshot: remove unnecessary NULL checks before vfree() calls

The vfree() function performs input parameter validation.
Thus the NULL pointer test around vfree() calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 4 insertions, 10 deletions

diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index d6e88178d22c..808b8419bc48 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -200,16 +200,11 @@ 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 +600,7 @@ 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);
 }