[PATCH] ib umem: bug: put pid back before return from error path

[Kenneth Lee]

I catched this bug when reading the code. I'm sorry I have no hardware to test
it. But it is abviously a bug.

Signed-off-by: Kenneth Lee <liguo...@hisilicon.com>
---
 drivers/infiniband/core/umem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 1e62a5f..4609b92 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -134,6 +134,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, 
unsigned long addr,
                 IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND));
 
        if (access & IB_ACCESS_ON_DEMAND) {
+               put_pid(umem->pid);
                ret = ib_umem_odp_get(context, umem);
                if (ret) {
                        kfree(umem);
@@ -149,6 +150,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, 
unsigned long addr,
 
        page_list = (struct page **) __get_free_page(GFP_KERNEL);
        if (!page_list) {
+               put_pid(umem->pid);
                kfree(umem);
                return ERR_PTR(-ENOMEM);
        }
-- 
1.9.1