Commit 63380a1a authored by Yunsheng Lin's avatar Yunsheng Lin Committed by David S. Miller

net: hns3: fix for TX clean num when cleaning TX BD

hns3_desc_unused() returns how many BD have been cleaned, but new
buffer has not been attached to them. The register of
HNS3_RING_RX_RING_FBDNUM_REG returns how many BD need allocating new
buffer to or need to cleaned. So the remaining BD need to be clean
is HNS3_RING_RX_RING_FBDNUM_REG - hns3_desc_unused().

Also, new buffer can not attach to the pending BD when the last BD is
not handled, because memcpy has not been done on the first pending BD.

This patch fixes by subtracting the pending BD num from unused_count
after 'HNS3_RING_RX_RING_FBDNUM_REG - unused_count' is used to calculate
the BD bum need to be clean.

Fixes: e5597095 ("net: hns3: Add handling of GRO Pkts not fully RX'ed in NAPI poll")
Signed-off-by: default avatarYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: default avatarPeng Li <lipeng321@huawei.com>
Signed-off-by: default avatarHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 26cda2f1
...@@ -2874,7 +2874,7 @@ int hns3_clean_rx_ring( ...@@ -2874,7 +2874,7 @@ int hns3_clean_rx_ring(
{ {
#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
int recv_pkts, recv_bds, clean_count, err; int recv_pkts, recv_bds, clean_count, err;
int unused_count = hns3_desc_unused(ring) - ring->pending_buf; int unused_count = hns3_desc_unused(ring);
struct sk_buff *skb = ring->skb; struct sk_buff *skb = ring->skb;
int num; int num;
...@@ -2883,6 +2883,7 @@ int hns3_clean_rx_ring( ...@@ -2883,6 +2883,7 @@ int hns3_clean_rx_ring(
recv_pkts = 0, recv_bds = 0, clean_count = 0; recv_pkts = 0, recv_bds = 0, clean_count = 0;
num -= unused_count; num -= unused_count;
unused_count -= ring->pending_buf;
while (recv_pkts < budget && recv_bds < num) { while (recv_pkts < budget && recv_bds < num) {
/* Reuse or realloc buffers */ /* Reuse or realloc buffers */
......
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