From: Kamal Heib kamalheib1@gmail.com
[ Upstream commit 23bbd5818e2b0d265aa1835e66f5055f63a8fa4c ]
Avoid disabling device management for devices that don't support Management datagrams (MADs) by checking if the "mad_agent" pointer is initialized before calling ib_modify_port, also fix the error flow in srpt_refresh_port() to disable device management if ib_register_mad_agent() fail.
Fixes: 09f8a1486dca ("RDMA/srpt: Fix handling of SR-IOV and iWARP ports") Link: https://lore.kernel.org/r/20200514114720.141139-1-kamalheib1@gmail.com Signed-off-by: Kamal Heib kamalheib1@gmail.com Reviewed-by: Bart Van Assche bvanassche@acm.org Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/ulp/srpt/ib_srpt.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index 98552749d71c..fcf982c60db6 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -610,6 +610,11 @@ static int srpt_refresh_port(struct srpt_port *sport) dev_name(&sport->sdev->device->dev), sport->port, PTR_ERR(sport->mad_agent)); sport->mad_agent = NULL; + memset(&port_modify, 0, sizeof(port_modify)); + port_modify.clr_port_cap_mask = IB_PORT_DEVICE_MGMT_SUP; + ib_modify_port(sport->sdev->device, sport->port, 0, + &port_modify); + } }
@@ -633,9 +638,8 @@ static void srpt_unregister_mad_agent(struct srpt_device *sdev) for (i = 1; i <= sdev->device->phys_port_cnt; i++) { sport = &sdev->port[i - 1]; WARN_ON(sport->port != i); - if (ib_modify_port(sdev->device, i, 0, &port_modify) < 0) - pr_err("disabling MAD processing failed.\n"); if (sport->mad_agent) { + ib_modify_port(sdev->device, i, 0, &port_modify); ib_unregister_mad_agent(sport->mad_agent); sport->mad_agent = NULL; }