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| author | Max Gurtovoy <mgurtovoy@nvidia.com> | 2022-10-16 12:38:32 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2022-10-19 10:38:35 +0300 |
| commit | a75243ae08d23272235cb26117464843538936b4 (patch) | |
| tree | e1b232e9a4e35c0cf8c88ef48a1a298bb7208c3d /drivers/infiniband/ulp | |
| parent | acc7d94ab431fb6f34e41588f2784410c2d9008e (diff) | |
| download | linux-stable-a75243ae08d23272235cb26117464843538936b4.tar.gz linux-stable-a75243ae08d23272235cb26117464843538936b4.tar.bz2 linux-stable-a75243ae08d23272235cb26117464843538936b4.zip | |
IB/iser: add safety checks for state_mutex lock
In some cases, we need to make sure that state_mutex is taken. Use
lockdep_assert_held to warn us in case it doesn't while it should.
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Link: https://lore.kernel.org/r/20221016093833.12537-3-mgurtovoy@nvidia.com
Reviewed-by: Sergey Gorenko <sergeygo@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iser_verbs.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index a73c30230ff9..f33e3a7f605d 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -448,6 +448,8 @@ int iser_conn_terminate(struct iser_conn *iser_conn) struct ib_conn *ib_conn = &iser_conn->ib_conn; int err = 0; + lockdep_assert_held(&iser_conn->state_mutex); + /* terminate the iser conn only if the conn state is UP */ if (iser_conn->state != ISER_CONN_UP) return 0; @@ -482,9 +484,10 @@ int iser_conn_terminate(struct iser_conn *iser_conn) */ static void iser_connect_error(struct rdma_cm_id *cma_id) { - struct iser_conn *iser_conn; + struct iser_conn *iser_conn = cma_id->context; + + lockdep_assert_held(&iser_conn->state_mutex); - iser_conn = cma_id->context; iser_conn->state = ISER_CONN_TERMINATING; } @@ -526,12 +529,13 @@ static void iser_calc_scsi_params(struct iser_conn *iser_conn, */ static void iser_addr_handler(struct rdma_cm_id *cma_id) { + struct iser_conn *iser_conn = cma_id->context; struct iser_device *device; - struct iser_conn *iser_conn; struct ib_conn *ib_conn; int ret; - iser_conn = cma_id->context; + lockdep_assert_held(&iser_conn->state_mutex); + if (iser_conn->state != ISER_CONN_PENDING) /* bailout */ return; @@ -581,6 +585,8 @@ static void iser_route_handler(struct rdma_cm_id *cma_id) struct ib_conn *ib_conn = &iser_conn->ib_conn; struct ib_device *ib_dev = ib_conn->device->ib_device; + lockdep_assert_held(&iser_conn->state_mutex); + if (iser_conn->state != ISER_CONN_PENDING) /* bailout */ return; @@ -613,14 +619,18 @@ failure: iser_connect_error(cma_id); } +/* + * Called with state mutex held + */ static void iser_connected_handler(struct rdma_cm_id *cma_id, const void *private_data) { - struct iser_conn *iser_conn; + struct iser_conn *iser_conn = cma_id->context; struct ib_qp_attr attr; struct ib_qp_init_attr init_attr; - iser_conn = cma_id->context; + lockdep_assert_held(&iser_conn->state_mutex); + if (iser_conn->state != ISER_CONN_PENDING) /* bailout */ return; @@ -654,11 +664,15 @@ static void iser_disconnected_handler(struct rdma_cm_id *cma_id) } } +/* + * Called with state mutex held + */ static void iser_cleanup_handler(struct rdma_cm_id *cma_id, bool destroy) { struct iser_conn *iser_conn = cma_id->context; + lockdep_assert_held(&iser_conn->state_mutex); /* * We are not guaranteed that we visited disconnected_handler * by now, call it here to be safe that we handle CM drep |