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IB/mlx4: Take write semaphore when changing the vma struct
authorMaor Gottlieb <maorg@mellanox.com>
Wed, 29 Mar 2017 03:03:00 +0000 (06:03 +0300)
committerDoug Ledford <dledford@redhat.com>
Fri, 21 Apr 2017 16:26:05 +0000 (12:26 -0400)
commit22c3653d04bd0c67b75e99d85e0c0bdf83947df5
tree1e7ec4e9a2c72b823d32576a59b4ec1c649807c8tree | snapshot
parentfb7a91746af18b2ebf596778b38a709cdbc488d3commit | diff
IB/mlx4: Take write semaphore when changing the vma struct

When the driver disassociate user context, it changes the vma to
anonymous by setting the vm_ops to null and zap the vma ptes.

In order to avoid race in the kernel, we need to take write lock
before we change the vma entries.

Fixes: ae184ddeca5db ('IB/mlx4_ib: Disassociate support')
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/hw/mlx4/main.c diff | blob | history
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