linux-kernel - [PATCH] usb: misc: onboard_usb_hub: Disable the USB hub clock on failure

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Message-Id: <20240408151700.1761009-1-festevam@gmail.com>
Date: Mon,  8 Apr 2024 12:17:00 -0300
From: Fabio Estevam <festevam@...il.com>
To: gregkh@...uxfoundation.org
Cc: mka@...omium.org,
	frieder.schrempf@...tron.de,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Fabio Estevam <festevam@...x.de>
Subject: [PATCH] usb: misc: onboard_usb_hub: Disable the USB hub clock on failure

From: Fabio Estevam <festevam@...x.de>

In case regulator_bulk_enable() fails, the previously enabled USB hub
clock should be disabled.

Fix it accordingly.

Fixes: 65e62b8a955a ("usb: misc: onboard_usb_hub: Add support for clock input")
Signed-off-by: Fabio Estevam <festevam@...x.de>
---
 drivers/usb/misc/onboard_usb_dev.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/misc/onboard_usb_dev.c b/drivers/usb/misc/onboard_usb_dev.c
index 648ea933bdad..f2bcc1a8b95f 100644
--- a/drivers/usb/misc/onboard_usb_dev.c
+++ b/drivers/usb/misc/onboard_usb_dev.c
@@ -93,7 +93,7 @@ static int onboard_dev_power_on(struct onboard_dev *onboard_dev)
 	if (err) {
 		dev_err(onboard_dev->dev, "failed to enable supplies: %pe\n",
 			ERR_PTR(err));
-		return err;
+		goto disable_clk;
 	}
 
 	fsleep(onboard_dev->pdata->reset_us);
@@ -102,6 +102,10 @@ static int onboard_dev_power_on(struct onboard_dev *onboard_dev)
 	onboard_dev->is_powered_on = true;
 
 	return 0;
+
+disable_clk:
+	clk_disable_unprepare(onboard_dev->clk);
+	return err;
 }
 
 static int onboard_dev_power_off(struct onboard_dev *onboard_dev)
-- 
2.34.1