From 1e27a628e3f444f53ab8099dfb31c5156e38d112 Mon Sep 17 00:00:00 2001 From: Maxime Chevallier Date: Thu, 12 Jul 2018 13:54:12 +0200 Subject: [PATCH] net: mvpp2: make sure we use single queue mode on PPv2.1 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index 88f3da184d76..0d2dde336ea2 100644 --- 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_device *pdev) (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)) -- 2.30.2