linux-kernel - [PATCH 3/6] phy: rockchip-inno-usb2: Do not lock in bvalid IRQ handler

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Message-Id: <20220414032258.40984-4-samuel@sholland.org>
Date:   Wed, 13 Apr 2022 22:22:54 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc:     Peter Geis <pgwipeout@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, linux-rockchip@...ts.infradead.org
Subject: [PATCH 3/6] phy: rockchip-inno-usb2: Do not lock in bvalid IRQ handler

Clearing the IRQ is atomic, so there is no need to hold the mutex.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---

 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 29407b36f5fa..3422db56be76 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -905,13 +905,9 @@ static irqreturn_t rockchip_usb2phy_bvalid_irq(int irq, void *data)
 	if (!property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 		return IRQ_NONE;
 
-	mutex_lock(&rport->mutex);
-
 	/* clear bvalid detect irq pending status */
 	property_enable(rphy->grf, &rport->port_cfg->bvalid_det_clr, true);
 
-	mutex_unlock(&rport->mutex);
-
 	rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 
 	return IRQ_HANDLED;
-- 
2.35.1