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powerpc/pseries: Cleanup error handling in iommu_pseries_alloc_group()

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Although kfree(NULL) is legal, it's a bit lazy to rely on that to
implement the error handling. So do it the normal Linux way using
labels for each failure path.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
[mpe: Squash a few patches and rewrite change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Markus Elfring 2017-10-18 20:48:52 +02:00 committed by Michael Ellerman
parent c28237f1d4
commit 4dd9eab39c
1 changed files with 9 additions and 10 deletions
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19
arch/powerpc/platforms/pseries/iommu.c
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@ -55,23 +55,23 @@
static struct iommu_table_group *iommu_pseries_alloc_group(int node)
{
struct iommu_table_group *table_group = NULL;
struct iommu_table *tbl = NULL;
struct iommu_table_group_link *tgl = NULL;
struct iommu_table_group *table_group;
struct iommu_table *tbl;
struct iommu_table_group_link *tgl;
table_group = kzalloc_node(sizeof(struct iommu_table_group), GFP_KERNEL,
node);
if (!table_group)
goto fail_exit;
return NULL;
tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, node);
if (!tbl)
goto fail_exit;
goto free_group;
tgl = kzalloc_node(sizeof(struct iommu_table_group_link), GFP_KERNEL,
node);
if (!tgl)
goto fail_exit;
goto free_table;
INIT_LIST_HEAD_RCU(&tbl->it_group_list);
kref_init(&tbl->it_kref);
@ -82,11 +82,10 @@ static struct iommu_table_group *iommu_pseries_alloc_group(int node)
return table_group;
fail_exit:
kfree(tgl);
kfree(table_group);
free_table:
kfree(tbl);
free_group:
kfree(table_group);
return NULL;
}