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Patch "IB/umem: Release pid in error and ODP flow" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Jan 30, 2017

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This is a note to let you know that I've just added the patch titled

IB/umem: Release pid in error and ODP flow

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
ib-umem-release-pid-in-error-and-odp-flow.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 828f6fa65ce7e80f77f5ab12942e44eb3d9d174e Mon Sep 17 00:00:00 2001

From: Kenneth Lee <[email protected]>
Date: Thu, 5 Jan 2017 15:00:05 +0800
Subject: IB/umem: Release pid in error and ODP flow

From: Kenneth Lee <[email protected]>

commit 828f6fa65ce7e80f77f5ab12942e44eb3d9d174e upstream.

1. Release pid before enter odp flow
2. Release pid when fail to allocate memory

Fixes 87773dd56d54 ("IB: ib_umem_release() should decrement mm->pinned_vm from ib_umem_get")
Fixes 8ada2c1c0c1d ("IB/core: Add support for on demand paging regions")
---
 drivers/infiniband/core/umem.c |    2 ++
 1 file changed, 2 insertions(+)
drivers/infiniband/core/umem.c +2 -0
@@ -134,6 +134,7 @@ struct ib_umem *ib_umem_get(struct ib_uc
 		 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_uc
 
 	page_list = (struct page **) __get_free_page(GFP_KERNEL);
 	if (!page_list) {
+		put_pid(umem->pid);
 		kfree(umem);
 		return ERR_PTR(-ENOMEM);
 	}

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/ib-umem-release-pid-in-error-and-odp-flow.patch