From: "Byczkowski, Jakub" <jakub.byczkowski@intel.com>
Date: Mon, 24 Jul 2017 07:46:24 -0700
Subject: IB/hfi1: Fix initialization failure for debug firmware
Patch-mainline: v4.14-rc1
Git-commit: a156abb3cf14112d3aa3f3a9ba880d48cf064cef
References: bsc#1060463 FATE#323043

Loading debug signed firmware fails if started immediately after
failed attempt to load production firmware. A short delay is
required so add about a 100us delay after RSA check failure.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hfi1/firmware.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/infiniband/hw/hfi1/firmware.c
+++ b/drivers/infiniband/hw/hfi1/firmware.c
@@ -615,6 +615,14 @@ retry:
 		fw_fabric_serdes_name = ALT_FW_FABRIC_NAME;
 		fw_sbus_name = ALT_FW_SBUS_NAME;
 		fw_pcie_serdes_name = ALT_FW_PCIE_NAME;
+
+		/*
+		 * Add a delay before obtaining and loading debug firmware.
+		 * Authorization will fail if the delay between firmware
+		 * authorization events is shorter than 50us. Add 100us to
+		 * make a delay time safe.
+		 */
+		usleep_range(100, 120);
 	}
 
 	if (fw_sbus_load) {