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net/netlabel: Correct redundant test 

entry was tested for NULL near the beginning of the function, followed by a
return, and there is no intervening modification of its value.

A simplified version of the semantic match that finds this problem is as
follows: (http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
expression E;
position p1,p2;
@@

if (x == NULL || ...) { ... when forall
   return ...; }
... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\)
(
*x == NULL
|
*x != NULL
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julia Lawall 2009-07-27 06:15:43 +00:00 committed by David S. Miller
parent 463889e27e
commit 4794323444
1 changed files with 2 additions and 4 deletions
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6
net/netlabel/netlabel_kapi.c
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@ -185,8 +185,7 @@ int netlbl_cfg_unlbl_map_add(const char *domain,
return 0;
cfg_unlbl_map_add_failure:
if (entry != NULL)
kfree(entry->domain);
kfree(entry->domain);
kfree(entry);
kfree(addrmap);
kfree(map4);
@ -385,8 +384,7 @@ int netlbl_cfg_cipsov4_map_add(u32 doi,
cfg_cipsov4_map_add_failure:
cipso_v4_doi_putdef(doi_def);
if (entry != NULL)
kfree(entry->domain);
kfree(entry->domain);
kfree(entry);
kfree(addrmap);
kfree(addrinfo);