linux-kernel - [PATCH v2] USB: PHY: JZ4770: Fix uninitialized value written to HW register

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Message-Id: <20200827131425.75998-1-paul@crapouillou.net>
Date:   Thu, 27 Aug 2020 15:14:25 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Felipe Balbi <balbi@...nel.org>,
        周琰杰 <zhouyanjie@...yeetech.com>,
        周正 <sernia.zhou@...mail.com>,
        漆鹏振 <aric.pzqi@...enic.com>
Cc:     od@...c.me, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH v2] USB: PHY: JZ4770: Fix uninitialized value written to HW register

The 'reg' value was written to a hardware register in
ingenic_usb_phy_init(), while not being initialized anywhere.

Fixes: 2a6c0b82e651 ("USB: PHY: JZ4770: Add support for new Ingenic SoCs.")
Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/usb/phy/phy-jz4770.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/phy/phy-jz4770.c b/drivers/usb/phy/phy-jz4770.c
index d4ee3cb721ea..f6d3731581eb 100644
--- a/drivers/usb/phy/phy-jz4770.c
+++ b/drivers/usb/phy/phy-jz4770.c
@@ -176,6 +176,7 @@ static int ingenic_usb_phy_init(struct usb_phy *phy)
 
 	/* Wait for PHY to reset */
 	usleep_range(30, 300);
+	reg = readl(priv->base + REG_USBPCR_OFFSET);
 	writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
 	usleep_range(300, 1000);
 
-- 
2.28.0