Jack Wang fcf2959da6 RDMA/rtrs-clt: Avoid run destroy_con_cq_qp/create_con_cq_qp in parallel ... It could happen two kworkers race with each other: CPU0 CPU1 addr_resolver kworker reconnect kworker rtrs_clt_rdma_cm_handler rtrs_rdma_addr_resolved create_con_cq_qp: s.dev_ref++ "s.dev_ref is 1" wait in create_cm fails with TIMEOUT destroy_con_cq_qp: --s.dev_ref "s.dev_ref is 0" destroy_con_cq_qp: sess->s.dev = NULL rtrs_cq_qp_create -> create_qp(con, sess->dev->ib_pd...) sess->dev is NULL, panic. To fix the problem using mutex to serialize create_con_cq_qp and destroy_con_cq_qp. Fixes: 6a98d71dae ("RDMA/rtrs: client: main functionality") Link: https://lore.kernel.org/r/20201023074353.21946-4-jinpu.wang@cloud.ionos.com Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com> Reviewed-by: Gioh Kim <gi-oh.kim@cloud.ionos.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>		2020-10-28 13:17:39 -03:00
..
ipoib	RDMA: Convert sysfs device * show functions to use sysfs_emit()	2020-10-26 19:53:21 -03:00
iser	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
isert	IB/isert: add module param to set sg_tablesize for IO cmd	2020-10-28 13:00:49 -03:00
opa_vnic	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
rtrs	RDMA/rtrs-clt: Avoid run destroy_con_cq_qp/create_con_cq_qp in parallel	2020-10-28 13:17:39 -03:00
srp	RDMA: Convert sysfs device * show functions to use sysfs_emit()	2020-10-26 19:53:21 -03:00
srpt	IB/srpt: use new shared CQ mechanism	2020-07-29 09:10:32 -03:00
Makefile	RDMA/rtrs: include client and server modules into kernel compilation	2020-05-17 18:57:15 -03:00