netdev - [PATCH net 3/6] igc: Add checking for basetime less than zero

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Message-Id: <20221215230758.3595578-4-anthony.l.nguyen@intel.com>
Date:   Thu, 15 Dec 2022 15:07:55 -0800
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com
Cc:     Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>,
        netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
        sasha.neftin@...el.com, Naama Meir <naamax.meir@...ux.intel.com>
Subject: [PATCH net 3/6] igc: Add checking for basetime less than zero

From: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>

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@...el.com>
Tested-by: Naama Meir <naamax.meir@...ux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index c67a8e8ea972..6ed12329ae80 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -6047,6 +6047,9 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
 	if (!qopt->enable)
 		return igc_tsn_clear_schedule(adapter);
 
+	if (qopt->base_time < 0)
+		return -ERANGE;
+
 	if (adapter->base_time)
 		return -EALREADY;
 
-- 
2.35.1