scsi: lpfc: Fix locking for lpfc_sli_iocbq_lookup()

commit c26bd6602e1d348bfa754dc55e5608c922dd2801 upstream.

The rules changed for lpfc_sli_iocbq_lookup() vs locking. Prior, the
routine properly took out the lock. In newly refactored code, the locks
must be held when calling the routine.

Fix lpfc_sli_process_sol_iocb() to take the locks before calling the
routine.

Fix lpfc_sli_handle_fast_ring_event() to not release the locks to call the
routine.

Link: https://lore.kernel.org/r/20220323205545.81814-3-jsmart2021@gmail.com
Fixes: 1b64aa9eae28 ("scsi: lpfc: SLI path split: Refactor fast and slow paths to native SLI4")
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 972251dd35a97da6c82ec2b70d6253993eadd3e2..14b91fe1171c2c51918503cb65aad17672b3ecad 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -3642,7 +3642,15 @@ lpfc_sli_process_sol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
        unsigned long iflag;
        u32 ulp_command, ulp_status, ulp_word4, ulp_context, iotag;
 
+       if (phba->sli_rev == LPFC_SLI_REV4)
+               spin_lock_irqsave(&pring->ring_lock, iflag);
+       else
+               spin_lock_irqsave(&phba->hbalock, iflag);
        cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq);
+       if (phba->sli_rev == LPFC_SLI_REV4)
+               spin_unlock_irqrestore(&pring->ring_lock, iflag);
+       else
+               spin_unlock_irqrestore(&phba->hbalock, iflag);
 
        ulp_command = get_job_cmnd(phba, saveq);
        ulp_status = get_job_ulpstatus(phba, saveq);
@@ -3979,10 +3987,8 @@ lpfc_sli_handle_fast_ring_event(struct lpfc_hba *phba,
                                break;
                        }
 
-                       spin_unlock_irqrestore(&phba->hbalock, iflag);
                        cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring,
                                                         &rspiocbq);
-                       spin_lock_irqsave(&phba->hbalock, iflag);
                        if (unlikely(!cmdiocbq))
                                break;
                        if (cmdiocbq->cmd_flag & LPFC_DRIVER_ABORTED)