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lpfc: Devices are not discovered during takeaway/giveback testing 

When a remote nport changes it's DID, a new ndlp is used.
However, we left the old ndlp state unchanged and still in
a discovery state. The may stall discovery resulting in some
devices not being discovered.  Correct by swapping the state
of the 2 ndlp's when a DID swap is detected.

Signed-off-by: Dick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
James Smart 2015-05-22 10:42:37 -04:00 committed by James Bottomley
parent 73dc0dbed3
commit 953ceeda97
1 changed files with 10 additions and 12 deletions
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22
drivers/scsi/lpfc/lpfc_els.c
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@ -1509,12 +1509,14 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
struct lpfc_nodelist *ndlp)
{
struct lpfc_vport *vport = ndlp->vport;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_nodelist *new_ndlp;
struct lpfc_rport_data *rdata;
struct fc_rport *rport;
struct serv_parm *sp;
uint8_t name[sizeof(struct lpfc_name)];
uint32_t rc, keepDID = 0, keep_nlp_flag = 0;
uint16_t keep_nlp_state;
int put_node;
int put_rport;
unsigned long *active_rrqs_xri_bitmap = NULL;
@ -1603,11 +1605,14 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
ndlp->active_rrqs_xri_bitmap,
phba->cfg_rrq_xri_bitmap_sz);
spin_lock_irq(shost->host_lock);
keep_nlp_flag = new_ndlp->nlp_flag;
new_ndlp->nlp_flag = ndlp->nlp_flag;
ndlp->nlp_flag = keep_nlp_flag;
spin_unlock_irq(shost->host_lock);
/* Set state will put new_ndlp on to node list if not already done */
/* Set nlp_states accordingly */
keep_nlp_state = new_ndlp->nlp_state;
lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
/* Move this back to NPR state */
@ -1668,20 +1673,13 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
active_rrqs_xri_bitmap,
phba->cfg_rrq_xri_bitmap_sz);
/* Since we are swapping the ndlp passed in with the new one
* and the did has already been swapped, copy over state.
* The new WWNs are already in new_ndlp since thats what
* we looked it up by in the begining of this routine.
*/
new_ndlp->nlp_state = ndlp->nlp_state;
/* Since we are switching over to the new_ndlp, the old
* ndlp should be put in the NPR state, unless we have
* already started re-discovery on it.
/* Since we are switching over to the new_ndlp,
* reset the old ndlp state
*/
if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
(ndlp->nlp_state == NLP_STE_MAPPED_NODE))
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
keep_nlp_state = NLP_STE_NPR_NODE;
lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
/* Fix up the rport accordingly */
rport = ndlp->rport;