From: Maxime Chevallier <maxime.chevallier@bootlin.com>
Date: Thu, 12 Jul 2018 13:54:12 +0200
Subject: net: mvpp2: make sure we use single queue mode on PPv2.1
Patch-mainline: v4.19-rc1
Git-commit: 1e27a628e3f444f53ab8099dfb31c5156e38d112
References: bsc#1119113 FATE#326472
The PPv2 driver defines 2 "queue_modes" :
- QDIST_SINGLE_MODE, where each port share one rx queue vector
between all CPUs
- QDIST_MULTI_MODE, where each port has one rx queue vector per CPU.
Multi queue mode isn't available on PPv2.1, make sure we fallback to
single mode when running on this revision.
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5014,6 +5014,12 @@ static int mvpp2_probe(struct platform_d
(unsigned long)of_device_get_match_data(&pdev->dev);
}
+ /* multi queue mode isn't supported on PPV2.1, fallback to single
+ * mode
+ */
+ if (priv->hw_version == MVPP21)
+ queue_mode = MVPP2_QDIST_SINGLE_MODE;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))