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target: fix return code in target_core_init_configfs error path

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This patch fixes error cases within target_core_init_configfs() to
properly set ret = -ENOMEM before jumping to the out_global exception
path.

This was originally discovered with the following Coccinelle semantic
match information:

Convert a nonnegative error return code to a negative one, as returned
elsewhere in the function.  A simplified version of the semantic match
that finds this problem is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Peter Senna Tschudin 2012-09-17 20:05:33 +02:00 committed by Nicholas Bellinger
parent 609234e3b6
commit 37bb7899ca
1 changed files with 7 additions and 1 deletions
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8
drivers/target/target_core_configfs.c
View File

@ -3124,6 +3124,7 @@ static int __init target_core_init_configfs(void)
GFP_KERNEL);
if (!target_cg->default_groups) {
pr_err("Unable to allocate target_cg->default_groups\n");
ret = -ENOMEM;
goto out_global;
}
@ -3139,6 +3140,7 @@ static int __init target_core_init_configfs(void)
GFP_KERNEL);
if (!hba_cg->default_groups) {
pr_err("Unable to allocate hba_cg->default_groups\n");
ret = -ENOMEM;
goto out_global;
}
config_group_init_type_name(&alua_group,
@ -3154,6 +3156,7 @@ static int __init target_core_init_configfs(void)
GFP_KERNEL);
if (!alua_cg->default_groups) {
pr_err("Unable to allocate alua_cg->default_groups\n");
ret = -ENOMEM;
goto out_global;
}
@ -3165,14 +3168,17 @@ static int __init target_core_init_configfs(void)
* Add core/alua/lu_gps/default_lu_gp
*/
lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
if (IS_ERR(lu_gp))
if (IS_ERR(lu_gp)) {
ret = -ENOMEM;
goto out_global;
}
lu_gp_cg = &alua_lu_gps_group;
lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!lu_gp_cg->default_groups) {
pr_err("Unable to allocate lu_gp_cg->default_groups\n");
ret = -ENOMEM;
goto out_global;
}