[PATCH 4.4 117/192] [PATCH 121/135] lpfc: Fix DMA faults observed upon plugging loopback connector

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit ae09c765109293b600ba9169aa3d632e1ac1a843 ]

Driver didn't program the REG_VFI mailbox correctly, giving the adapter
bad addresses.

Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/scsi/lpfc/lpfc_mbox.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -2145,10 +2145,12 @@ lpfc_reg_vfi(struct lpfcMboxq *mbox, str
 	reg_vfi->wwn[1] = cpu_to_le32(reg_vfi->wwn[1]);
 	reg_vfi->e_d_tov = phba->fc_edtov;
 	reg_vfi->r_a_tov = phba->fc_ratov;
-	reg_vfi->bde.addrHigh = putPaddrHigh(phys);
-	reg_vfi->bde.addrLow = putPaddrLow(phys);
-	reg_vfi->bde.tus.f.bdeSize = sizeof(vport->fc_sparam);
-	reg_vfi->bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+	if (phys) {
+		reg_vfi->bde.addrHigh = putPaddrHigh(phys);
+		reg_vfi->bde.addrLow = putPaddrLow(phys);
+		reg_vfi->bde.tus.f.bdeSize = sizeof(vport->fc_sparam);
+		reg_vfi->bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+	}
 	bf_set(lpfc_reg_vfi_nport_id, reg_vfi, vport->fc_myDID);
 
 	/* Only FC supports upd bit */