Chuck Lever 426b8fb3d6 svcrdma: Hold private mutex while invoking rdma_accept() ... [ Upstream commit 0ac24c320c4d89a9de6ec802591398b8675c7b3c ] RDMA core mutex locking was restructured by commit d114c6feed ("RDMA/cma: Add missing locking to rdma_accept()") [Aug 2020]. When lock debugging is enabled, the RPC/RDMA server trips over the new lockdep assertion in rdma_accept() because it doesn't call rdma_accept() from its CM event handler. As a temporary fix, have svc_rdma_accept() take the handler_mutex explicitly. In the meantime, let's consider how to restructure the RPC/RDMA transport to invoke rdma_accept() from the proper context. Calls to svc_rdma_accept() are serialized with calls to svc_rdma_free() by the generic RPC server layer. Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/linux-rdma/20210209154014.GO4247@nvidia.com/ Fixes: d114c6feed ("RDMA/cma: Add missing locking to rdma_accept()") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-03-04 11:38:08 +01:00
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sunrpc	svcrdma: Hold private mutex while invoking rdma_accept()	2021-03-04 11:38:08 +01:00
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