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Commit cc2e14e6 authored by Jason Gunthorpe's avatar Jason Gunthorpe
Browse files

IB/uverbs: Lower the test for ongoing disassociation 



Commands that are reading/writing to objects can test for an ongoing
disassociation during their initial call to rdma_lookup_get_uobject.  This
directly prevents all of these commands from conflicting with an ongoing
disassociation.

Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 1e857e65

drivers/infiniband/core/rdma_core.c

+11 −0
Original line number Diff line number Diff line
@@ -449,6 +449,17 @@ struct ib_uobject *rdma_lookup_get_uobject(const struct uverbs_obj_type *type, 
		goto free;

	}



	/*

	 * If we have been disassociated block every command except for

	 * DESTROY based commands.

	 */

	if (mode != UVERBS_LOOKUP_DESTROY &&

	    !srcu_dereference(ufile->device->ib_dev,

			      &ufile->device->disassociate_srcu)) {

		ret = -EIO;

		goto free;

	}



	ret = uverbs_try_lock_object(uobj, mode);

	if (ret)

		goto free;