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RDMA/iwcm: Release resources if iw_cm module initialization fails 

[ Upstream commit e677b72a0647249370f2635862bf0241c86f66ad ]

The failure during iw_cm module initialization partially left the system
with unreleased memory and other resources. Rewrite the module init/exit
routines in such way that netlink commands will be opened only after
successful initialization.

Fixes: b493d91d33 ("iwcm: common code for port mapper")
Link: https://lore.kernel.org/r/b01239f99cb1a3e6d2b0694c242d89e6410bcd93.1627048781.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Leon Romanovsky 2021-07-23 17:08:55 +03:00 committed by Greg Kroah-Hartman
parent 7930b1f98d
commit fb42b9801e
1 changed files with 12 additions and 7 deletions
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19
drivers/infiniband/core/iwcm.c
View File

@ -1187,29 +1187,34 @@ static int __init iw_cm_init(void)
ret = iwpm_init(RDMA_NL_IWCM);
if (ret)
pr_err("iw_cm: couldn't init iwpm\n");
else
rdma_nl_register(RDMA_NL_IWCM, iwcm_nl_cb_table);
return ret;
iwcm_wq = alloc_ordered_workqueue("iw_cm_wq", 0);
if (!iwcm_wq)
return -ENOMEM;
goto err_alloc;
iwcm_ctl_table_hdr = register_net_sysctl(&init_net, "net/iw_cm",
iwcm_ctl_table);
if (!iwcm_ctl_table_hdr) {
pr_err("iw_cm: couldn't register sysctl paths\n");
destroy_workqueue(iwcm_wq);
return -ENOMEM;
goto err_sysctl;
}
rdma_nl_register(RDMA_NL_IWCM, iwcm_nl_cb_table);
return 0;
err_sysctl:
destroy_workqueue(iwcm_wq);
err_alloc:
iwpm_exit(RDMA_NL_IWCM);
return -ENOMEM;
}
static void __exit iw_cm_cleanup(void)
{
rdma_nl_unregister(RDMA_NL_IWCM);
unregister_net_sysctl_table(iwcm_ctl_table_hdr);
destroy_workqueue(iwcm_wq);
rdma_nl_unregister(RDMA_NL_IWCM);
iwpm_exit(RDMA_NL_IWCM);
}