There are two bugfixes in this patch:
Fixes: 87773dd56d54 ("IB: ib_umem_release() should decrement mm->pinned_vm from ib_umem_get")
This patch introduce the get_task_pid but not put it back on all error
path
Fixes: 8ada2c1c0c1d ("IB/core: Add support for on demand paging regions")
This patch introduce a ODP flow without release pid before enter it
Signed-off-by: Kenneth Lee <liguozhu@xxxxxxxxxxxxx>
Reviewed-by: Haggai Eran <haggaie@xxxxxxxxxxxx>
---
Change from v1 to v2:
Correcting the patch title and description
Change from v2 to v3:
Update the title and add "Fixes" fields in the description
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
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