linux-kernel - [PATCH] usb: mtu3: replace spin_lock_irqsave by spin

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Message-ID: <1605515682-23771-1-git-send-email-tiantao6@hisilicon.com>
Date:   Mon, 16 Nov 2020 16:34:42 +0800
From:   Tian Tao <tiantao6@...ilicon.com>
To:     <chunfeng.yun@...iatek.com>, <gregkh@...uxfoundation.org>,
        <matthias.bgg@...il.com>
CC:     <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] usb: mtu3: replace spin_lock_irqsave by spin_lock in hard IRQ

The code has been in a irq-disabled context since it is hard IRQ. There
is no necessity to do it again.

Signed-off-by: Tian Tao <tiantao6@...ilicon.com>
---
 drivers/usb/mtu3/mtu3_core.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index b3b4599..a6d7684 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -745,10 +745,9 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu)
 static irqreturn_t mtu3_irq(int irq, void *data)
 {
 	struct mtu3 *mtu = (struct mtu3 *)data;
-	unsigned long flags;
 	u32 level1;
 
-	spin_lock_irqsave(&mtu->lock, flags);
+	spin_lock(&mtu->lock);
 
 	/* U3D_LV1ISR is RU */
 	level1 = mtu3_readl(mtu->mac_base, U3D_LV1ISR);
@@ -769,7 +768,7 @@ static irqreturn_t mtu3_irq(int irq, void *data)
 	if (level1 & QMU_INTR)
 		mtu3_qmu_isr(mtu);
 
-	spin_unlock_irqrestore(&mtu->lock, flags);
+	spin_unlock(&mtu->lock);
 
 	return IRQ_HANDLED;
 }
-- 
2.7.4