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RDMA/siw: Fix broken RDMA Read Fence/Resume logic.
commit b43a76f upstream. Code unconditionally resumed fenced SQ processing after next RDMA Read completion, even if other RDMA Read responses are still outstanding, or ORQ is full. Also adds comments for better readability of fence processing, and removes orq_get_tail() helper, which is not needed anymore. Fixes: 8b6a361 ("rdma/siw: receive path") Fixes: a531975 ("rdma/siw: main include file") Link: https://lore.kernel.org/r/20220130170815.1940-1-bmt@zurich.ibm.com Reported-by: Jared Holzman <jared.holzman@excelero.com> Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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