IB/cm: Protect cm_dev, cm_ports and mad_agent with kref and lock

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During cm_dev deregistration in cm_remove_one(), the cm_device and
cm_ports will be freed, after that they should not be accessed. The
mad_agent needs to be protected as well.

This patch adds a cm_device kref to protect cm_dev and cm_ports, and a
mad_agent_lock spinlock to protect mad_agent.

Link: https://lore.kernel.org/r/501ba7a2ff203dccd0e6755d3f93329772adce52.1622629024.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Mark Zhang 2021-06-02 13:27:08 +03:00 • committed by Jason Gunthorpe

parent 7345201c39

commit 76039ac909

1 changed files with 93 additions and 19 deletions

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drivers/infiniband/core/cm.c

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