linux-kernel - [PATCH linux-next v2] firewire: fw_device_init: 'minor' may be used uninitialized

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Date:	Mon, 18 Feb 2013 14:24:36 -0700
From:	Tim Gardner <tim.gardner@...onical.com>
To:	linux-kernel@...r.kernel.org
Cc:	Tim Gardner <tim.gardner@...onical.com>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	linux1394-devel@...ts.sourceforge.net
Subject: [PATCH linux-next v2] firewire: fw_device_init: 'minor' may be used uninitialized

'firewire: convert to idr_alloc()' accidentally orphaned 'minor'.

drivers/firewire/core-device.c: In function ‘fw_device_init’:
drivers/firewire/core-device.c:1029:24: warning: ‘minor’ may be used uninitialized in this function [-Wuninitialized]

Cc: Stefan Richter <stefanr@...6.in-berlin.de>
Cc: linux1394-devel@...ts.sourceforge.net
Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
---

If this patch is correct, then it also ought to go to stable
if it misses 3.8 final.

v2 - Better commit subject

 drivers/firewire/core-device.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index b946330..03ce7d9 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -1017,10 +1017,11 @@ static void fw_device_init(struct work_struct *work)
 
 	fw_device_get(device);
 	down_write(&fw_device_rwsem);
-	ret = idr_alloc(&fw_device_idr, device, 0, 1 << MINORBITS, GFP_KERNEL);
+	minor = idr_alloc(&fw_device_idr, device, 0, 1 << MINORBITS,
+			GFP_KERNEL);
 	up_write(&fw_device_rwsem);
 
-	if (ret < 0)
+	if (minor < 0)
 		goto error;
 
 	device->device.bus = &fw_bus_type;
-- 
1.7.9.5

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