linux-kernel - [PATCH] net: cdc-ncm: Move spin_lock_bh() to spin

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Message-Id: <20220418141812.1241307-1-yuyunbo519@gmail.com>
Date:   Mon, 18 Apr 2022 22:18:12 +0800
From:   Yunbo Yu <yuyunbo519@...il.com>
To:     oliver@...kum.org, davem@...emloft.net, kuba@...nel.org,
        pabeni@...hat.com
Cc:     linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yunbo Yu <yuyunbo519@...il.com>
Subject: [PATCH] net: cdc-ncm:  Move spin_lock_bh() to spin_lock()

It is unnecessary to call spin_lock_bh() for you are already in a tasklet.

Signed-off-by: Yunbo Yu <yuyunbo519@...il.com>
---
 drivers/net/usb/cdc_ncm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 15f91d691bba..cdca00c0dc1f 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -1492,19 +1492,19 @@ static void cdc_ncm_txpath_bh(struct tasklet_struct *t)
 	struct cdc_ncm_ctx *ctx = from_tasklet(ctx, t, bh);
 	struct usbnet *dev = ctx->dev;
 
-	spin_lock_bh(&ctx->mtx);
+	spin_lock(&ctx->mtx);
 	if (ctx->tx_timer_pending != 0) {
 		ctx->tx_timer_pending--;
 		cdc_ncm_tx_timeout_start(ctx);
-		spin_unlock_bh(&ctx->mtx);
+		spin_unlock(&ctx->mtx);
 	} else if (dev->net != NULL) {
 		ctx->tx_reason_timeout++;	/* count reason for transmitting */
-		spin_unlock_bh(&ctx->mtx);
+		spin_unlock(&ctx->mtx);
 		netif_tx_lock_bh(dev->net);
 		usbnet_start_xmit(NULL, dev->net);
 		netif_tx_unlock_bh(dev->net);
 	} else {
-		spin_unlock_bh(&ctx->mtx);
+		spin_unlock(&ctx->mtx);
 	}
 }
 
-- 
2.25.1