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IB/core: Add locking around event dispatching on XRC target QPs

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Fix a potential race when event occurrs on a target XRC QP and in the
middle of reporting that on its shared qps, one of them is destroyed
by user space application.  Also add note for kernel consumers in
ib_verbs.h that they must not destroy the QP from within the handler.

Signed-off-by: Yishai Hadas <[email protected]>
Signed-off-by: Jack Morgenstein <[email protected]>
Signed-off-by: Or Gerlitz <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>
This commit is contained in:
Yishai Hadas 2013-08-01 18:49:53 +03:00 • committed by Roland Dreier
commit 73c40c616a
2 changed files with 9 additions and 0 deletions
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6
include/rdma/ib_verbs.h
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@ -635,6 +635,12 @@ enum ib_qp_create_flags {
IB_QP_CREATE_RESERVED_END = 1 << 31,
};
/*
* Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
* callback to destroy the passed in QP.
*/
struct ib_qp_init_attr {
void (*event_handler)(struct ib_event *, void *);
void *qp_context;