netdev - [PATCH net] net: cpsw: disable napi in cpsw_ndo

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Date:   Wed, 9 Nov 2022 09:15:37 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-omap@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <grygorii.strashko@...com>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <hawk@...nel.org>,
        <john.fastabend@...il.com>, <chi.minghao@....com.cn>,
        <mkl@...gutronix.de>, <wsa+renesas@...g-engineering.com>,
        <ardb@...nel.org>, <yangyingliang@...wei.com>,
        <mugunthanvnm@...com>, <weiyongjun1@...wei.com>,
        <yuehaibing@...wei.com>, <shaozhengchao@...wei.com>
Subject: [PATCH net] net: cpsw: disable napi in cpsw_ndo_open()

When failed to create xdp rxqs or fill rx channels in cpsw_ndo_open() for
opening device, napi isn't disabled. When open cpsw device next time, it
will report a invalid opcode issue. Fix it. Only be compiled, not be
tested.

Fixes: d354eb85d618 ("drivers: net: cpsw: dual_emac: simplify napi usage")
Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 drivers/net/ethernet/ti/cpsw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 709ca6dd6ecb..13c9c2d6b79b 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -854,6 +854,8 @@ static int cpsw_ndo_open(struct net_device *ndev)
 
 err_cleanup:
 	if (!cpsw->usage_count) {
+		napi_disable(&cpsw->napi_rx);
+		napi_disable(&cpsw->napi_tx);
 		cpdma_ctlr_stop(cpsw->dma);
 		cpsw_destroy_xdp_rxqs(cpsw);
 	}
-- 
2.17.1