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H A D | rdma.c | diff d8f7750a08968b105056328652d2c332bdfa062d Thu May 19 07:24:55 CDT 2016 Sagi Grimberg <sagi@grimberg.me> nvmet-rdma: Correctly handle RDMA device hot removal
When configuring a device attached listener, we may see device removal events. In this case we return a non-zero return code from the cm event handler which implicitly destroys the cm_id. It is possible that in the future the user will remove this listener and by that trigger a second call to rdma_destroy_id on an already destroyed cm_id -> BUG.
In addition, when a queue bound (active session) cm_id generates a DEVICE_REMOVAL event we must guarantee all resources are cleaned up by the time we return from the event handler.
Introduce nvmet_rdma_device_removal which addresses (or at least attempts to) both scenarios.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Christoph Hellwig <hch@lst.de>
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