Like another p?d_alloc(), pud_alloc() also may fail, so need check it.
Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx>
---
arch/metag/kernel/dma.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c
index db589ad..e6cf39b 100644
--- a/arch/metag/kernel/dma.c
+++ b/arch/metag/kernel/dma.c
@@ -398,6 +398,11 @@ static int __init dma_alloc_init(void)
int offset = pgd_index(CONSISTENT_START);
pgd = pgd_offset(&init_mm, CONSISTENT_START);
pud = pud_alloc(&init_mm, pgd, CONSISTENT_START);
+ if (!pud) {
+ pr_err("%s: no pud tables\n", __func__);
+ ret = -ENOMEM;
+ break;
+ }
pmd = pmd_alloc(&init_mm, pud, CONSISTENT_START);
if (!pmd) {
pr_err("%s: no pmd tables\n", __func__);
--
1.7.7.6
--
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