From: Sebastian Siewior <bigeasy@linutronix.de>
Date: Fri, 16 Jun 2017 17:24:00 +0000 (+0200)
Subject: net/core: remove explicit do_softirq() from busy_poll_stop()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fe420d87bbc234015b4195dd239b7d3052b140ea;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

net/core: remove explicit do_softirq() from busy_poll_stop()

Since commit 217f69743681 ("net: busy-poll: allow preemption in
sk_busy_loop()") there is an explicit do_softirq() invocation after
local_bh_enable() has been invoked.
I don't understand why we need this because local_bh_enable() will
invoke do_softirq() once the softirq counter reached zero and we have
softirq-related work pending.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 6d60149287a1..7243421c9783 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5206,8 +5206,6 @@ static void busy_poll_stop(struct napi_struct *napi, void *have_poll_lock)
 	if (rc == BUSY_POLL_BUDGET)
 		__napi_schedule(napi);
 	local_bh_enable();
-	if (local_softirq_pending())
-		do_softirq();
 }
 
 void napi_busy_loop(unsigned int napi_id,