[PATCH v2] iommu/amd: Fix possible memory leak of 'domain'

[Su Hui <suhui@nfschina.com>]

Move allocation code down to avoid memory leak.

Fixes: 29f54745f245 ("iommu/amd: Add missing domain type checks")
Signed-off-by: Su Hui <suhui@nfschina.com>
---
Changes in v2:
	change code order is better and more consistent with other
drivers. 
 drivers/iommu/amd/iommu.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index dc1ec6849775..e8a2e5984acb 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2078,10 +2078,6 @@ static struct protection_domain *protection_domain_alloc(unsigned int type)
 	int mode = DEFAULT_PGTABLE_LEVEL;
 	int ret;
 
-	domain = kzalloc(sizeof(*domain), GFP_KERNEL);
-	if (!domain)
-		return NULL;
-
 	/*
 	 * Force IOMMU v1 page table when iommu=pt and
 	 * when allocating domain for pass-through devices.
@@ -2097,6 +2093,10 @@ static struct protection_domain *protection_domain_alloc(unsigned int type)
 		return NULL;
 	}
 
+	domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+	if (!domain)
+		return NULL;
+
 	switch (pgtable) {
 	case AMD_IOMMU_V1:
 		ret = protection_domain_init_v1(domain, mode);
-- 
2.30.2