From: John Fastabend Date: Thu, 7 Oct 2010 06:35:15 +0000 (-0700) Subject: net: netif_set_real_num_rx_queues may cap num_rx_queues at init time X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3d3211ef5cf7558d289d1a1efbef8c45595639aa;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git net: netif_set_real_num_rx_queues may cap num_rx_queues at init time Do not set num_rx_queues in netif_set_real_num_rx_queues() some drivers will increase the real_num_rx_queues later due to a feature changes or available interrupts increasing. By setting num_rx_queues here this ends up creating a cap on the number of rx queues available. For example the ixgbe driver sets the max number of queues it intends to use ever then sets the current number in use with the netif_set_num_{rx|tx}_queues calls. With the current implementation the number of rx queues gets limited so when a feature such as DCB or FCoE is enabled the queues are no longer available. kobjects will only be allocated for real_num_rx_queues so the waste in memory is minimal. Signed-off-by: John Fastabend Signed-off-by: Jeff Kirsher Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- diff --git a/net/core/dev.c b/net/core/dev.c index 7d149550e8d6..fd1b75a47e88 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1593,8 +1593,6 @@ int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq) rxq); if (rc) return rc; - } else { - dev->num_rx_queues = rxq; } dev->real_num_rx_queues = rxq;