mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2024-12-24 15:43:25 +00:00
89 lines
2.3 KiB
Diff
89 lines
2.3 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Mon, 8 Feb 2021 11:34:08 -0800
|
|
Subject: [PATCH] net: extract napi poll functionality to __napi_poll()
|
|
|
|
This commit introduces a new function __napi_poll() which does the main
|
|
logic of the existing napi_poll() function, and will be called by other
|
|
functions in later commits.
|
|
This idea and implementation is done by Felix Fietkau <nbd@nbd.name> and
|
|
is proposed as part of the patch to move napi work to work_queue
|
|
context.
|
|
This commit by itself is a code restructure.
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
Signed-off-by: Wei Wang <weiwan@google.com>
|
|
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
|
|
--- a/net/core/dev.c
|
|
+++ b/net/core/dev.c
|
|
@@ -6810,15 +6810,10 @@ void __netif_napi_del(struct napi_struct
|
|
}
|
|
EXPORT_SYMBOL(__netif_napi_del);
|
|
|
|
-static int napi_poll(struct napi_struct *n, struct list_head *repoll)
|
|
+static int __napi_poll(struct napi_struct *n, bool *repoll)
|
|
{
|
|
- void *have;
|
|
int work, weight;
|
|
|
|
- list_del_init(&n->poll_list);
|
|
-
|
|
- have = netpoll_poll_lock(n);
|
|
-
|
|
weight = n->weight;
|
|
|
|
/* This NAPI_STATE_SCHED test is for avoiding a race
|
|
@@ -6838,7 +6833,7 @@ static int napi_poll(struct napi_struct
|
|
n->poll, work, weight);
|
|
|
|
if (likely(work < weight))
|
|
- goto out_unlock;
|
|
+ return work;
|
|
|
|
/* Drivers must not modify the NAPI state if they
|
|
* consume the entire weight. In such cases this code
|
|
@@ -6847,7 +6842,7 @@ static int napi_poll(struct napi_struct
|
|
*/
|
|
if (unlikely(napi_disable_pending(n))) {
|
|
napi_complete(n);
|
|
- goto out_unlock;
|
|
+ return work;
|
|
}
|
|
|
|
if (n->gro_bitmask) {
|
|
@@ -6865,12 +6860,29 @@ static int napi_poll(struct napi_struct
|
|
if (unlikely(!list_empty(&n->poll_list))) {
|
|
pr_warn_once("%s: Budget exhausted after napi rescheduled\n",
|
|
n->dev ? n->dev->name : "backlog");
|
|
- goto out_unlock;
|
|
+ return work;
|
|
}
|
|
|
|
- list_add_tail(&n->poll_list, repoll);
|
|
+ *repoll = true;
|
|
+
|
|
+ return work;
|
|
+}
|
|
+
|
|
+static int napi_poll(struct napi_struct *n, struct list_head *repoll)
|
|
+{
|
|
+ bool do_repoll = false;
|
|
+ void *have;
|
|
+ int work;
|
|
+
|
|
+ list_del_init(&n->poll_list);
|
|
+
|
|
+ have = netpoll_poll_lock(n);
|
|
+
|
|
+ work = __napi_poll(n, &do_repoll);
|
|
+
|
|
+ if (do_repoll)
|
|
+ list_add_tail(&n->poll_list, repoll);
|
|
|
|
-out_unlock:
|
|
netpoll_poll_unlock(have);
|
|
|
|
return work;
|