linux-kernel - [PATCH 4.8 040/125] rt2x00usb: Fix error return code

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Message-Id: <20161029134948.874558681@linuxfoundation.org>
Date:   Sat, 29 Oct 2016 09:49:18 -0400
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Stanislaw Gruszka <sgruszka@...hat.com>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 4.8 040/125] rt2x00usb: Fix error return code

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

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

From: Christophe Jaillet <christophe.jaillet@...adoo.fr>

commit 410280bac6224e066f4cf0b87db08f0418a135b6 upstream.

We know that 'retval = 0' because it has been tested a few lines above.
So, if 'devm_kmalloc' fails, 0 will be returned instead of an error code.
Return -ENOMEM instead.

Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Acked-by: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
@@ -831,8 +831,10 @@ int rt2x00usb_probe(struct usb_interface
 	rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
 					sizeof(struct usb_anchor),
 					GFP_KERNEL);
-	if (!rt2x00dev->anchor)
+	if (!rt2x00dev->anchor) {
+		retval = -ENOMEM;
 		goto exit_free_reg;
+	}
 
 	init_usb_anchor(rt2x00dev->anchor);
 	return 0;