linux-kernel - [PATCH 5.15 496/779] phy: stm32: fix error return in stm32_usbphyc_phy

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Date:   Mon, 15 Aug 2022 20:02:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 496/779] phy: stm32: fix error return in stm32_usbphyc_phy_init

From: Fabrice Gasnier <fabrice.gasnier@...s.st.com>

[ Upstream commit 32b378a9179ae4db61cfc5d502717214e6cd1e1c ]

Error code is overridden, in case the PLL doesn't lock. So, the USB
initialization can continue. This leads to a platform freeze.
This can be avoided by returning proper error code to avoid USB probe
freezing the platform. It also displays proper errors in log.

Fixes: 5b1af71280ab ("phy: stm32: rework PLL Lock detection")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...s.st.com>
Link: https://lore.kernel.org/r/20220713133953.595134-1-fabrice.gasnier@foss.st.com
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/phy/st/phy-stm32-usbphyc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/st/phy-stm32-usbphyc.c b/drivers/phy/st/phy-stm32-usbphyc.c
index da05642d3bd4..cd0747ab6267 100644
--- a/drivers/phy/st/phy-stm32-usbphyc.c
+++ b/drivers/phy/st/phy-stm32-usbphyc.c
@@ -279,7 +279,9 @@ static int stm32_usbphyc_phy_init(struct phy *phy)
 	return 0;
 
 pll_disable:
-	return stm32_usbphyc_pll_disable(usbphyc);
+	stm32_usbphyc_pll_disable(usbphyc);
+
+	return ret;
 }
 
 static int stm32_usbphyc_phy_exit(struct phy *phy)
-- 
2.35.1