Commit 8f2643bd authored Aug 22, 2024 by Haibin Lu Committed by mufengyan Aug 25, 2024

UNIC: Fix the issue that RPS cannot hash sw irq to multiple cores.

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IAKMX4


CVE: NA

-----------------------------------------------------------

In UBL support mode, the chip supports only the RSS feature
that uses dip as key. If the hash calculated by the hardware is
transmitted to the SKB, the software interrupt for receiving
packets can be hashed to only one core after the kernel RPS
feature is enabled.

This patch ensures that the hash value calculated by the
hardware is not set in the SKB when the driver constructs the
SKB in the case of UBL support. This can significantly improve
the hashing effect of the rps feature.

Fixes: 737ec46e ("UNIC: Adds the process of UNIC driver initializing")
Signed-off-by: Haibin Lu <luhaibin10@hisilicon.com>

parent a2960a09

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -4685,6 +4685,10 @@ static int hns3_handle_bdinfo(struct hns3_enet_ring ring, struct sk_buff skb)

		ring->tqp_vector->rx_group.total_bytes += len;

		#ifdef CONFIG_HNS3_UBL
		if (hns3_ubl_supported(hns3_get_handle(netdev)))
		return 0;
		#endif
		hns3_set_rx_skb_rss_type(ring, skb, le32_to_cpu(desc->rx.rss_hash),
		l234info, ol_info);
		return 0;