From: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Date: Fri, 9 Dec 2022 12:15:19 +0800
Subject: igc: Add checking for basetime less than zero
Patch-mainline: v6.2-rc1
Git-commit: 3b61764fb49a6e147ac90d71dccdddc9d5508ba1
References: jsc#SLE-18377

Using the tc qdisc command, the user can set basetime to any value.
Checking should be done on the driver's side to prevent registering
basetime values that are less than zero.

Fixes: ec50a9d437f0 ("igc: Add support for taprio offloading")
Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/igc/igc_main.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -5985,6 +5985,9 @@ static int igc_save_qbv_schedule(struct
 	if (!qopt->enable)
 		return igc_tsn_clear_schedule(adapter);
 
+	if (qopt->base_time < 0)
+		return -ERANGE;
+
 	if (adapter->base_time)
 		return -EALREADY;