From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
The test here typod the cm_id_priv to use, it used the one that was
freshly allocated. By definition the allocated one has the matching
cm_handler and zero context, so the condition was always true.
Instead check that the existing listening ID is compatible with the
proposed handler so that it can be shared, as was originally intended.
Fixes: 067b171b8679 ("IB/cm: Share listening CM IDs")
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/cm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index b1fccbf6ebd8..67b36b8b34ba 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1185,7 +1185,8 @@ struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
/* Find an existing ID */
cm_id_priv = cm_find_listen(device, service_id);
if (cm_id_priv) {
- if (cm_id->cm_handler != cm_handler || cm_id->context) {
+ if (cm_id_priv->id.cm_handler != cm_handler ||
+ cm_id_priv->id.context) {
/* Sharing an ib_cm_id with different handlers is not
* supported */
spin_unlock_irqrestore(&cm.lock, flags);
--
2.24.1
