From: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Date: Thu, 23 Jul 2020 17:31:48 +0000 (-0600)
Subject: dev: Defer free of skbs in flush_backlog
X-Git-Tag: v4.9.232~14
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b7441315b8d2b25a2bdcc71957148b8ad843955a;p=platform%2Fkernel%2Flinux-amlogic.git

dev: Defer free of skbs in flush_backlog

[ Upstream commit 7df5cb75cfb8acf96c7f2342530eb41e0c11f4c3 ]

IRQs are disabled when freeing skbs in input queue.
Use the IRQ safe variant to free skbs here.

Fixes: 145dd5f9c88f ("net: flush the softnet backlog in process context")
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 267b648a0645..dd8d36feb69f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4392,7 +4392,7 @@ static void flush_backlog(struct work_struct *work)
 	skb_queue_walk_safe(&sd->input_pkt_queue, skb, tmp) {
 		if (skb->dev->reg_state == NETREG_UNREGISTERING) {
 			__skb_unlink(skb, &sd->input_pkt_queue);
-			kfree_skb(skb);
+			dev_kfree_skb_irq(skb);
 			input_queue_head_incr(sd);
 		}
 	}