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RDMA/cm: Print the old state when cm_destroy_id gets timeout 

[ Upstream commit b68e1acb58 ]

The old state is helpful for debugging, as the current state is always
IB_CM_IDLE when timeout happens.

Fixes: 96d9cbe2f2 ("RDMA/cm: add timeout to cm_destroy_id wait")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/20240322112049.2022994-1-markzhang@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mark Zhang 2024-03-22 13:20:49 +02:00 committed by Greg Kroah-Hartman
parent 2d0452b04c
commit be2f19a3bc
1 changed files with 7 additions and 4 deletions
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11
drivers/infiniband/core/cm.c
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@ -1026,23 +1026,26 @@ static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
}
}
static noinline void cm_destroy_id_wait_timeout(struct ib_cm_id *cm_id)
static noinline void cm_destroy_id_wait_timeout(struct ib_cm_id *cm_id,
enum ib_cm_state old_state)
{
struct cm_id_private *cm_id_priv;
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
pr_err("%s: cm_id=%p timed out. state=%d refcnt=%d\n", __func__,
cm_id, cm_id->state, refcount_read(&cm_id_priv->refcount));
pr_err("%s: cm_id=%p timed out. state %d -> %d, refcnt=%d\n", __func__,
cm_id, old_state, cm_id->state, refcount_read(&cm_id_priv->refcount));
}
static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
{
struct cm_id_private *cm_id_priv;
enum ib_cm_state old_state;
struct cm_work *work;
int ret;
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
spin_lock_irq(&cm_id_priv->lock);
old_state = cm_id->state;
retest:
switch (cm_id->state) {
case IB_CM_LISTEN:
@ -1151,7 +1154,7 @@ retest:
msecs_to_jiffies(
CM_DESTROY_ID_WAIT_TIMEOUT));
if (!ret) /* timeout happened */
cm_destroy_id_wait_timeout(cm_id);
cm_destroy_id_wait_timeout(cm_id, old_state);
} while (!ret);
while ((work = cm_dequeue_work(cm_id_priv)) != NULL)