linux-kernel - [PATCH 3.16.y-ckt 005/170] usb: phy: return -ENODEV on failure of try_module

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Date:	Tue, 11 Nov 2014 11:06:04 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Arjun Sreedharan <arjun024@...il.com>, Felipe Balbi <balbi@...com>,
	Mark Brown <broonie@...nel.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 005/170] usb: phy: return -ENODEV on failure of try_module_get

3.16.7-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arjun Sreedharan <arjun024@...il.com>

commit 2c4e3dbf63b39d44a291db70016c718f45d9cd46 upstream.

When __usb_find_phy_dev() does not return error and
try_module_get() fails, return -ENODEV.

Signed-off-by: Arjun Sreedharan <arjun024@...il.com>
Signed-off-by: Felipe Balbi <balbi@...com>
Cc: Mark Brown <broonie@...nel.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/usb/phy/phy.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
index 36b6bce33b20..fd0d7f122ace 100644
--- a/drivers/usb/phy/phy.c
+++ b/drivers/usb/phy/phy.c
@@ -232,6 +232,9 @@ struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index)
 	phy = __usb_find_phy_dev(dev, &phy_bind_list, index);
 	if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) {
 		dev_dbg(dev, "unable to find transceiver\n");
+		if (!IS_ERR(phy))
+			phy = ERR_PTR(-ENODEV);
+
 		goto err0;
 	}
 
-- 
2.1.0

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