scsi: lpfc: Fix BFS crash with DIX enabled

Crashes in scsi_queue_rq or in dma_unmap_direct_sg during BFS when lpfc has
lpfc_enable_bg=1.

lpfc is setting DIX and prot sg after scsi_add_host_with_dma() has been
called. The scsi_host_set_prot() and scsi_host_set_guard() routines need to
be called before scsi_add_host_with_dma().

Revise the calling sequence to set the protection/guard data before calling
scsi_add_host_with_dma().

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 416f0fb..a2b827d 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -94,6 +94,7 @@ static void lpfc_sli4_disable_intr(struct lpfc_hba *);
 static uint32_t lpfc_sli4_enable_intr(struct lpfc_hba *, uint32_t);
 static void lpfc_sli4_oas_verify(struct lpfc_hba *phba);
 static uint16_t lpfc_find_cpu_handle(struct lpfc_hba *, uint16_t, int);
+static void lpfc_setup_bg(struct lpfc_hba *, struct Scsi_Host *);
 
 static struct scsi_transport_template *lpfc_transport_template = NULL;
 static struct scsi_transport_template *lpfc_vport_transport_template = NULL;
@@ -4348,6 +4349,9 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 
        timer_setup(&vport->delayed_disc_tmo, lpfc_delayed_disc_tmo, 0);
 
+       if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
+               lpfc_setup_bg(phba, shost);
+
        error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
        if (error)
                goto out_put_shost;
@@ -7669,8 +7673,6 @@ lpfc_post_init_setup(struct lpfc_hba *phba)
         */
        shost = pci_get_drvdata(phba->pcidev);
        shost->can_queue = phba->cfg_hba_queue_depth - 10;
-       if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
-               lpfc_setup_bg(phba, shost);
 
        lpfc_host_attrib_init(shost);