RDMA/ucma: Do not use file->mut to lock destroying

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The only reader of destroying is inside a handler under the handler_mutex,
so directly use the handler_mutex when setting it instead of the larger
file->mut.

As the refcount could be zero here, and the cm_id already freed, and
additional refcount grab around the locking is required to touch the
cm_id.

Link: https://lore.kernel.org/r/20200818120526.702120-8-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Jason Gunthorpe 2020-08-18 15:05:19 +03:00

parent d114c6feed

commit 308571debc

1 changed files with 11 additions and 3 deletions

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14

drivers/infiniband/core/ucma.c

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