Staging: lustre: llite: file: remove unneeded null test before free

Kfree can cope with a null argument, so drop null tests.

The semantic patch that finds this issue is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@ expression ptr; @@

- if (ptr != NULL)
  kfree(ptr);
// </smpl>

In the first case, llss can never be null at the point of the kfree anyway.

In the second set of changes, the gotos are either eliminated, when no
freeing is needed (hss failure case), or rewritten so that there is no call
to free on data that has not yet been allocated (free_hss goto case).
There is no goto at which attr is not null, so the out label is simply
dropped.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index 6e50b3554e336b30f3d30bf49bb7459b565678d6..702f62d44430a2e594a998db4c7f04663540948a 100644 (file)
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -2109,8 +2109,7 @@ putgl:
        }
 
 free:
-       if (llss != NULL)
-               kfree(llss);
+       kfree(llss);
 
        return rc;
 }
@@ -2152,22 +2151,20 @@ static int ll_hsm_import(struct inode *inode, struct file *file,
 
        /* set HSM flags */
        hss = kzalloc(sizeof(*hss), GFP_NOFS);
-       if (!hss) {
-               rc = -ENOMEM;
-               goto out;
-       }
+       if (!hss)
+               return -ENOMEM;
 
        hss->hss_valid = HSS_SETMASK | HSS_ARCHIVE_ID;
        hss->hss_archive_id = hui->hui_archive_id;
        hss->hss_setmask = HS_ARCHIVED | HS_EXISTS | HS_RELEASED;
        rc = ll_hsm_state_set(inode, hss);
        if (rc != 0)
-               goto out;
+               goto free_hss;
 
        attr = kzalloc(sizeof(*attr), GFP_NOFS);
        if (!attr) {
                rc = -ENOMEM;
-               goto out;
+               goto free_hss;
        }
 
        attr->ia_mode = hui->hui_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
@@ -2193,13 +2190,9 @@ static int ll_hsm_import(struct inode *inode, struct file *file,
 
        mutex_unlock(&inode->i_mutex);
 
-out:
-       if (hss != NULL)
-               kfree(hss);
-
-       if (attr != NULL)
-               kfree(attr);
-
+       kfree(attr);
+free_hss:
+       kfree(hss);
        return rc;
 }