From 5132282f9c4b39e21b51ec024237533ecaa98fd2 Mon Sep 17 00:00:00 2001 From: Sunil Goutham Date: Fri, 24 Nov 2017 15:04:03 +0300 Subject: [PATCH] net: thunderx: Set max queue count taking XDP_TX into account [ Upstream commit 87de083857aa269fb171ef0b39696b2888361c58 ] on T81 there are only 4 cores, hence setting max queue count to 4 would leave nothing for XDP_TX. This patch fixes this by doubling max queue count in above scenarios. Signed-off-by: Sunil Goutham Signed-off-by: cjacob Signed-off-by: Aleksey Makarov Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/cavium/thunder/nicvf_main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index 805ab45e9b5a..2237ef8e4344 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -1832,6 +1832,11 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) nic->pdev = pdev; nic->pnicvf = nic; nic->max_queues = qcount; + /* If no of CPUs are too low, there won't be any queues left + * for XDP_TX, hence double it. + */ + if (!nic->t88) + nic->max_queues *= 2; /* MAP VF's configuration registers */ nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); -- 2.20.1