IB/umem: Release pid in error and ODP flow

1. Release pid before enter odp flow 2. Release pid when fail to allocate memory Fixes: 87773dd ("IB: ib_umem_release() should decrement mm->pinned_vm from ib_umem_get") Fixes: 8ada2c1 ("IB/core: Add support for on demand paging regions") Signed-off-by: Kenneth Lee <[email protected]> Reviewed-by: Haggai Eran <[email protected]> Reviewed-by: Leon Romanovsky <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
chewitt · Jan 24, 2017 · 828f6fa · 828f6fa
1 parent f449c7a
commit 828f6fa
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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);
 	}