linux-kernel - [PATCH 4/5] net: hns3: replace disable_irq by IRQ

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Date:   Thu, 18 Jun 2020 13:02:10 +1200
From:   Barry Song <song.bao.hua@...ilicon.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>
CC:     <yisen.zhuang@...wei.com>, <salil.mehta@...wei.com>,
        <netdev@...r.kernel.org>, <linyunsheng@...wei.com>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
        Barry Song <song.bao.hua@...ilicon.com>
Subject: [PATCH 4/5] net: hns3: replace disable_irq by IRQ_NOAUTOEN flag

disable_irq() after request_irq() is still risk as there is a chance irq
can come after request_irq() and before disable_irq().
this should be done by IRQ_NOAUTOEN flag.

Signed-off-by: Barry Song <song.bao.hua@...ilicon.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 3cd2216e49b9..1330820152fa 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -8,6 +8,7 @@
 #include <linux/cpu_rmap.h>
 #endif
 #include <linux/if_vlan.h>
+#include <linux/irq.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <linux/module.h>
@@ -154,6 +155,7 @@ static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 
 		tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';
 
+		irq_set_status_flags(tqp_vectors->vector_irq, IRQ_NOAUTOEN);
 		ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
 				  tqp_vectors->name, tqp_vectors);
 		if (ret) {
@@ -163,8 +165,6 @@ static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 			return ret;
 		}
 
-		disable_irq(tqp_vectors->vector_irq);
-
 		irq_set_affinity_hint(tqp_vectors->vector_irq,
 				      &tqp_vectors->affinity_mask);
 
-- 
2.23.0