willy@infradead.org 9a41e38a46 IB/mad: Use IDR for agent IDs ... Allocate agent IDs from a global IDR instead of an atomic variable. This eliminates the possibility of reusing an ID which is already in use after 4 billion registrations. We limit the assigned ID to be less than 2^24 as the mlx4 driver uses the most significant byte of the agent ID to store the slave number. Users unlucky enough to see a collision between agent numbers and slave numbers see messages like: mlx4_ib: egress mad has non-null tid msb:1 class:4 slave:0 and the MAD layer stops working. We look up the agent under protection of the RCU lock, which means we have to free the agent using kfree_rcu, and only increment the reference counter if it is not 0. Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Reported-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Acked-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Tested-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>		2018-06-18 11:22:54 -06:00
..
core	IB/mad: Use IDR for agent IDs	2018-06-18 11:22:54 -06:00
hw	RDMA: Convert drivers to use the AH's sgid_attr in post_wr paths	2018-06-18 11:11:27 -06:00
sw	RDMA: Convert drivers to use sgid_attr instead of sgid_index	2018-06-18 11:11:26 -06:00
ulp	IB: Replace ib_query_gid/ib_get_cached_gid with rdma_query_gid	2018-06-18 11:09:05 -06:00
Kconfig	RDMA/ucm: Mark UCM interface as BROKEN	2018-05-24 09:39:25 -06:00
Makefile