xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[SCSI] lpfc 8.2.4 : Rework misplaced reference taking on node structure

Browse Source 
Rework misplaced reference taking on node structure

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Smart
2008-01-11 01:53:27 -05:00
committed by James Bottomley
parent c95d6c6c2b
commit fa4066b672
5 changed files with 157 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

172
drivers/scsi/lpfc/lpfc_els.c
View File

@@ -120,12 +120,8 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
pcmd = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (pcmd)
pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
if (!pcmd || !pcmd->virt) {
kfree(pcmd);
lpfc_sli_release_iocbq(phba, elsiocb);
return NULL;
}
if (!pcmd || !pcmd->virt)
goto els_iocb_free_pcmb_exit;
INIT_LIST_HEAD(&pcmd->list);
@@ -135,13 +131,8 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
if (prsp)
prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
&prsp->phys);
if (!prsp || !prsp->virt) {
kfree(prsp);
lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
kfree(pcmd);
lpfc_sli_release_iocbq(phba, elsiocb);
return NULL;
}
if (!prsp || !prsp->virt)
goto els_iocb_free_prsp_exit;
INIT_LIST_HEAD(&prsp->list);
} else {
prsp = NULL;
@@ -152,15 +143,8 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
if (pbuflist)
pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
&pbuflist->phys);
if (!pbuflist || !pbuflist->virt) {
lpfc_sli_release_iocbq(phba, elsiocb);
lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
kfree(pcmd);
kfree(prsp);
kfree(pbuflist);
return NULL;
}
if (!pbuflist || !pbuflist->virt)
goto els_iocb_free_pbuf_exit;
INIT_LIST_HEAD(&pbuflist->list);
@@ -205,7 +189,10 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
bpl->tus.w = le32_to_cpu(bpl->tus.w);
}
/* prevent preparing iocb with NULL ndlp reference */
elsiocb->context1 = lpfc_nlp_get(ndlp);
if (!elsiocb->context1)
goto els_iocb_free_pbuf_exit;
elsiocb->context2 = pcmd;
elsiocb->context3 = pbuflist;
elsiocb->retry = retry;
@@ -231,8 +218,20 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
cmdSize);
}
return elsiocb;
}
els_iocb_free_pbuf_exit:
lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
kfree(pbuflist);
els_iocb_free_prsp_exit:
lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
kfree(prsp);
els_iocb_free_pcmb_exit:
kfree(pcmd);
lpfc_sli_release_iocbq(phba, elsiocb);
return NULL;
}
static int
lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
@@ -513,6 +512,9 @@ lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
/* Check to see if link went down during discovery */
if (lpfc_els_chk_latt(vport)) {
/* One additional decrement on node reference count to
* trigger the release of the node
*/
lpfc_nlp_put(ndlp);
goto out;
}
@@ -731,6 +733,9 @@ lpfc_initial_flogi(struct lpfc_vport *vport)
}
if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
/* This decrement of reference count to node shall kick off
* the release of the node.
*/
lpfc_nlp_put(ndlp);
}
return 1;
@@ -754,7 +759,11 @@ lpfc_initial_fdisc(struct lpfc_vport *vport)
lpfc_dequeue_node(vport, ndlp);
}
if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
/* decrement node reference count to trigger the release of
* the node.
*/
lpfc_nlp_put(ndlp);
return 0;
}
return 1;
}
@@ -1557,6 +1566,9 @@ lpfc_issue_els_scr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
ndlp->nlp_DID, ELS_CMD_SCR);
if (!elsiocb) {
/* This will trigger the release of the node just
* allocated
*/
lpfc_nlp_put(ndlp);
return 1;
}
@@ -1578,10 +1590,17 @@ lpfc_issue_els_scr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
phba->fc_stat.elsXmitSCR++;
elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
/* The additional lpfc_nlp_put will cause the following
* lpfc_els_free_iocb routine to trigger the rlease of
* the node.
*/
lpfc_nlp_put(ndlp);
lpfc_els_free_iocb(phba, elsiocb);
return 1;
}
/* This will cause the callback-function lpfc_cmpl_els_cmd to
* trigger the release of node.
*/
lpfc_nlp_put(ndlp);
return 0;
}
@@ -1613,6 +1632,9 @@ lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
ndlp->nlp_DID, ELS_CMD_RNID);
if (!elsiocb) {
/* This will trigger the release of the node just
* allocated
*/
lpfc_nlp_put(ndlp);
return 1;
}
@@ -1649,10 +1671,17 @@ lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
phba->fc_stat.elsXmitFARPR++;
elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
/* The additional lpfc_nlp_put will cause the following
* lpfc_els_free_iocb routine to trigger the release of
* the node.
*/
lpfc_nlp_put(ndlp);
lpfc_els_free_iocb(phba, elsiocb);
return 1;
}
/* This will cause the callback-function lpfc_cmpl_els_cmd to
* trigger the release of the node.
*/
lpfc_nlp_put(ndlp);
return 0;
}
@@ -1712,7 +1741,10 @@ lpfc_els_retry_delay(unsigned long ptr)
return;
}
evtp->evt_arg1 = ndlp;
/* We need to hold the node by incrementing the reference
* count until the queued work is done
*/
evtp->evt_arg1 = lpfc_nlp_get(ndlp);
evtp->evt = LPFC_EVT_ELS_RETRY;
list_add_tail(&evtp->evt_listp, &phba->work_list);
if (phba->work_wait)
@@ -2190,6 +2222,11 @@ lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
* thread, just unregister the RPI.
*/
lpfc_unreg_rpi(vport, ndlp);
} else {
/* Indicate the node has already released, should
* not reference to it from within lpfc_els_free_iocb.
*/
cmdiocb->context1 = NULL;
}
}
lpfc_els_free_iocb(phba, cmdiocb);
@@ -2208,7 +2245,6 @@ lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
mempool_free(pmb, phba->mbox_mem_pool);
if (ndlp) {
lpfc_nlp_put(ndlp);
/* This is the end of the default RPI cleanup logic for this
* ndlp. If no other discovery threads are using this ndlp.
* we should free all resources associated with it.
@@ -2236,11 +2272,13 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
if (cmdiocb->context_un.mbox)
mbox = cmdiocb->context_un.mbox;
/* First determine if this is a LS_RJT cmpl */
/* First determine if this is a LS_RJT cmpl. Note, this callback
* function can have cmdiocb->contest1 (ndlp) field set to NULL.
*/
pcmd = (uint8_t *) (((struct lpfc_dmabuf *) cmdiocb->context2)->virt);
if (*((uint32_t *) (pcmd)) == ELS_CMD_LS_RJT) {
/* A LS_RJT associated with Default RPI cleanup
* has its own seperate code path.
if (ndlp && (*((uint32_t *) (pcmd)) == ELS_CMD_LS_RJT)) {
/* A LS_RJT associated with Default RPI cleanup has its own
* seperate code path.
*/
if (!(ndlp->nlp_flag & NLP_RM_DFLT_RPI))
ls_rjt = 1;
@@ -2257,8 +2295,14 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
mempool_free(mbox, phba->mbox_mem_pool);
}
if (ndlp && (ndlp->nlp_flag & NLP_RM_DFLT_RPI))
if (lpfc_nlp_not_used(ndlp))
if (lpfc_nlp_not_used(ndlp)) {
ndlp = NULL;
/* Indicate the node has already released,
* should not reference to it from within
* the routine lpfc_els_free_iocb.
*/
cmdiocb->context1 = NULL;
}
goto out;
}
@@ -2302,14 +2346,27 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
ndlp->nlp_rpi);
if (lpfc_nlp_not_used(ndlp))
if (lpfc_nlp_not_used(ndlp)) {
ndlp = NULL;
/* Indicate node has already been released,
* should not reference to it from within
* the routine lpfc_els_free_iocb.
*/
cmdiocb->context1 = NULL;
}
} else {
/* Do not drop node for lpfc_els_abort'ed ELS cmds */
if (!lpfc_error_lost_link(irsp) &&
ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
if (lpfc_nlp_not_used(ndlp))
if (lpfc_nlp_not_used(ndlp)) {
ndlp = NULL;
/* Indicate node has already been
* released, should not reference
* to it from within the routine
* lpfc_els_free_iocb.
*/
cmdiocb->context1 = NULL;
}
}
}
mp = (struct lpfc_dmabuf *) mbox->context1;
@@ -2331,7 +2388,12 @@ out:
* resources.
*/
if (ls_rjt)
lpfc_nlp_not_used(ndlp);
if (lpfc_nlp_not_used(ndlp))
/* Indicate node has already been released,
* should not reference to it from within
* the routine lpfc_els_free_iocb.
*/
cmdiocb->context1 = NULL;
}
lpfc_els_free_iocb(phba, cmdiocb);
@@ -3292,7 +3354,10 @@ lpfc_els_rsp_rps_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
lpfc_max_els_tries, ndlp,
ndlp->nlp_DID, ELS_CMD_ACC);
/* Decrement the ndlp reference count from previous mbox command */
lpfc_nlp_put(ndlp);
if (!elsiocb)
return;
@@ -3375,11 +3440,13 @@ lpfc_els_rcv_rps(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
mbox->context2 = lpfc_nlp_get(ndlp);
mbox->vport = vport;
mbox->mbox_cmpl = lpfc_els_rsp_rps_acc;
if (lpfc_sli_issue_mbox (phba, mbox, MBX_NOWAIT)
if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
!= MBX_NOT_FINISHED)
/* Mbox completion will send ELS Response */
return 0;
/* Decrement reference count used for the failed mbox
* command.
*/
lpfc_nlp_put(ndlp);
mempool_free(mbox, phba->mbox_mem_pool);
}
@@ -4284,7 +4351,6 @@ lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
spin_unlock_irq(shost->host_lock);
lpfc_nlp_put(ndlp);
if (mb->mbxStatus) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
@@ -4317,6 +4383,12 @@ lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
else
lpfc_do_scr_ns_plogi(phba, vport);
}
/* Now, we decrement the ndlp reference count held for this
* callback function
*/
lpfc_nlp_put(ndlp);
mempool_free(pmb, phba->mbox_mem_pool);
return;
}
@@ -4336,26 +4408,29 @@ lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
== MBX_NOT_FINISHED) {
/* mailbox command not success, decrement ndlp
* reference count for this command
*/
lpfc_nlp_put(ndlp);
mempool_free(mbox, phba->mbox_mem_pool);
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
spin_unlock_irq(shost->host_lock);
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
"0253 Register VPI: Can't send mbox\n");
goto mbox_err_exit;
}
} else {
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
"0254 Register VPI: no memory\n");
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
spin_unlock_irq(shost->host_lock);
lpfc_nlp_put(ndlp);
goto mbox_err_exit;
}
return;
mbox_err_exit:
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
spin_unlock_irq(shost->host_lock);
return;
}
static void
@@ -4436,7 +4511,8 @@ lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
else
lpfc_do_scr_ns_plogi(phba, vport);
lpfc_nlp_put(ndlp); /* Free Fabric ndlp for vports */
/* Unconditionaly kick off releasing fabric node for vports */
lpfc_nlp_put(ndlp);
}
out: