From: James Smart jsmart2021@gmail.com
[ Upstream commit f0d3919697492950f57a26a1093aee53880d669d ]
During rmmod testing, messages appeared indicating lpfc_mbuf_pool entries were still busy. This situation was only seen doing rmmod after at least 1 vport (NPIV) instance was created and destroyed. The number of messages scaled with the number of vports created.
When a vport is created, it can receive a PLOGI from another initiator Nport. When this happens, the driver prepares to ack the PLOGI and prepares an RPI for registration (via mbx cmd) which includes an mbuf allocation. During the unsolicited PLOGI processing and after the RPI preparation, the driver recognizes it is one of the vport instances and decides to reject the PLOGI. During the LS_RJT preparation for the PLOGI, the mailbox struct allocated for RPI registration is freed, but the mbuf that was also allocated is not released.
Fix by freeing the mbuf with the mailbox struct in the LS_RJT path.
As part of the code review to figure the issue out a couple of other areas where found that also would not have released the mbuf. Those are cleaned up as well.
Link: https://lore.kernel.org/r/20211204002644.116455-2-jsmart2021@gmail.com Co-developed-by: Justin Tee justin.tee@broadcom.com Signed-off-by: Justin Tee justin.tee@broadcom.com Signed-off-by: James Smart jsmart2021@gmail.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/lpfc/lpfc_els.c | 6 +++++- drivers/scsi/lpfc/lpfc_init.c | 8 ++++++-- drivers/scsi/lpfc/lpfc_nportdisc.c | 6 ++++++ 3 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index f7197b7161d52..6d7b9571f5c03 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -6877,6 +6877,7 @@ static int lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context) { LPFC_MBOXQ_t *mbox = NULL; + struct lpfc_dmabuf *mp; int rc;
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL); @@ -6892,8 +6893,11 @@ lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context) mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0; mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context; rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT); - if (rc == MBX_NOT_FINISHED) + if (rc == MBX_NOT_FINISHED) { + mp = (struct lpfc_dmabuf *)mbox->ctx_buf; + lpfc_mbuf_free(phba, mp->virt, mp->phys); goto issue_mbox_fail; + }
return 0;
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 0fee8d590b0c4..2bbd1be6cc5d4 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -5314,8 +5314,10 @@ lpfc_sli4_async_link_evt(struct lpfc_hba *phba, */ if (!(phba->hba_flag & HBA_FCOE_MODE)) { rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT); - if (rc == MBX_NOT_FINISHED) + if (rc == MBX_NOT_FINISHED) { + lpfc_mbuf_free(phba, mp->virt, mp->phys); goto out_free_dmabuf; + } return; } /* @@ -6266,8 +6268,10 @@ lpfc_sli4_async_fc_evt(struct lpfc_hba *phba, struct lpfc_acqe_fc_la *acqe_fc) }
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT); - if (rc == MBX_NOT_FINISHED) + if (rc == MBX_NOT_FINISHED) { + lpfc_mbuf_free(phba, mp->virt, mp->phys); goto out_free_dmabuf; + } return;
out_free_dmabuf: diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c index 27263f02ab9f6..7d717a4ac14d1 100644 --- a/drivers/scsi/lpfc/lpfc_nportdisc.c +++ b/drivers/scsi/lpfc/lpfc_nportdisc.c @@ -322,6 +322,7 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, { struct lpfc_hba *phba = vport->phba; struct lpfc_dmabuf *pcmd; + struct lpfc_dmabuf *mp; uint64_t nlp_portwwn = 0; uint32_t *lp; IOCB_t *icmd; @@ -571,6 +572,11 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, * a default RPI. */ if (phba->sli_rev == LPFC_SLI_REV4) { + mp = (struct lpfc_dmabuf *)login_mbox->ctx_buf; + if (mp) { + lpfc_mbuf_free(phba, mp->virt, mp->phys); + kfree(mp); + } mempool_free(login_mbox, phba->mbox_mem_pool); login_mbox = NULL; } else {