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scsi: lpfc: Fix deadlock due to nested hbalock call 

If an adapter fails, causing a board reset, the board reset routine
lpfc_hba_down_s4() takes the hbalock out then calls
lpfc_nvmet_ctxbuf_post() who then tries to take out the same lock.  As the
context lists are now protected under the buf_list_locks, there is no need
for the hbalock to be held by the board reset routine.

Fix by no longer taking the hbalock in the board reset routine.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2019-03-12 16:30:12 -07:00 committed by Martin K. Petersen
parent 22b738ac33
commit 731eedcb31
1 changed files with 3 additions and 3 deletions
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6
drivers/scsi/lpfc/lpfc_init.c
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@ -1117,19 +1117,19 @@ lpfc_hba_down_post_s4(struct lpfc_hba *phba)
}
}
spin_unlock_irq(&phba->hbalock);
if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME) {
spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
spin_lock_irq(&phba->sli4_hba.abts_nvmet_buf_list_lock);
list_splice_init(&phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
&nvmet_aborts);
spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
spin_unlock_irq(&phba->sli4_hba.abts_nvmet_buf_list_lock);
list_for_each_entry_safe(ctxp, ctxp_next, &nvmet_aborts, list) {
ctxp->flag &= ~(LPFC_NVMET_XBUSY | LPFC_NVMET_ABORT_OP);
lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
}
}
spin_unlock_irq(&phba->hbalock);
lpfc_sli4_free_sp_events(phba);
return cnt;
}