linux-kernel - [PATCH net RESEND 3/3] nfp: Use IRQF_NO_AUTOEN flag in request

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Message-ID: <20240911094445.1922476-4-ruanjinjie@huawei.com>
Date: Wed, 11 Sep 2024 17:44:45 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <claudiu.manoil@....com>, <vladimir.oltean@....com>,
	<louis.peens@...igine.com>, <damien.lemoal@...nsource.wdc.com>,
	<set_pte_at@...look.com>, <mpe@...erman.id.au>, <horms@...nel.org>,
	<yinjun.zhang@...igine.com>, <ryno.swart@...igine.com>,
	<johannes.berg@...el.com>, <fei.qin@...igine.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <oss-drivers@...igine.com>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH net RESEND 3/3] nfp: Use IRQF_NO_AUTOEN flag in request_irq()

disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable when request IRQ.

Reviewed-by: Louis Peens <louis.peens@...igine.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
v1 -> RESEND
- Put wireless into another patch set.
- Add reviewed-by.
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 182ba0a8b095..6e0929af0f72 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -821,14 +821,13 @@ nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
 
 	snprintf(r_vec->name, sizeof(r_vec->name),
 		 "%s-rxtx-%d", nfp_net_name(nn), idx);
-	err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name,
-			  r_vec);
+	err = request_irq(r_vec->irq_vector, r_vec->handler, IRQF_NO_AUTOEN,
+			  r_vec->name, r_vec);
 	if (err) {
 		nfp_net_napi_del(&nn->dp, r_vec);
 		nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
 		return err;
 	}
-	disable_irq(r_vec->irq_vector);
 
 	irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
 
-- 
2.34.1