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| author | Maor Gottlieb <maorg@mellanox.com> | 2017-03-29 06:03:01 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-04-21 12:26:05 -0400 |
| commit | ca37a664a8e4e9988b220988ceb4d79e3316f195 (patch) | |
| tree | c7a6c5170599b6f07490ab071cb7bea868f4b420 | |
| parent | 22c3653d04bd0c67b75e99d85e0c0bdf83947df5 (diff) | |
| download | linux-ca37a664a8e4e9988b220988ceb4d79e3316f195.tar.gz linux-ca37a664a8e4e9988b220988ceb4d79e3316f195.tar.bz2 linux-ca37a664a8e4e9988b220988ceb4d79e3316f195.zip | |
IB/mlx4: Change vma from shared to private
Anonymous VMA (->vm_ops == NULL) cannot be shared, otherwise
it would lead to SIGBUS.
Remove the shared flags from the vma after we change it to be
anonymous.
This is easily reproduced by doing modprobe -r while running a
user-space application such as raw_ethernet_bw.
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>
| -rw-r--r-- | drivers/infiniband/hw/mlx4/main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index e2fd6c6fb1b3..521d0def2d9e 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -1187,6 +1187,8 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) BUG_ON(1); } + context->hw_bar_info[i].vma->vm_flags &= + ~(VM_SHARED | VM_MAYSHARE); /* context going to be destroyed, should not access ops any more */ context->hw_bar_info[i].vma->vm_ops = NULL; } |