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| author | Justin Tee <justin.tee@broadcom.com> | 2023-07-12 11:05:15 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-07-23 16:17:07 -0400 |
| commit | 90cec07f53e9948106e335377cc249414f39684f (patch) | |
| tree | 9949f454a583141981f9c1c0edf78b9de010633d /tools/perf/scripts/python | |
| parent | 377d7abadd74abc62c415578cda9f5e0a070abbd (diff) | |
scsi: lpfc: Revise ndlp kref handling for dev_loss_tmo_callbk and lpfc_drop_node
The ndlp kref count implementation in lpfc_dev_loss_tmo_callbk() removes
the initial node reference when a vport is unloading. When lpfc_cleanup()
sends a DEVICE_RM event and is in NPR state, the driver calls
lpfc_drop_node(). Subsequently, lpfc_drop_node() also removes an ndlp kref
thinking it is the initial reference. This unintentionally introduces an
extra kref decrement on the ndlp object.
Fix by using the NLP_DROPPED node flag in lpfc_dev_loss_tmo_callbk() and
lpfc_drop_node() to coordinate the removal of the initial node reference.
In lpfc_dev_loss_tmo_callbk(), remove the SCSI transport reference provided
the node is registered in the dev_loss context because the driver cannot
call the SCSI transport in dev_loss context or afterwards. And, have
lpfc_drop_node() not remove a reference if another thread is acting or has
already acted on it.
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20230712180522.112722-6-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions