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[media] rc-main: fix missing unlock if no devno left

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While playing with make coccicheck I noticed this message:
drivers/media/rc/rc-main.c:1245:3-9: preceding lock on line 1238

It was introduced by commit 587d1b06e0 ([media] rc-core: reuse device
numbers) which returns -ENOMEM after a mutex_lock without first
unlocking it when there are no more device numbers left. The added code
doesn't depend on the device lock, so move it before the lock is taken.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
James Hogan 2014-03-01 19:52:25 -03:00 committed by Mauro Carvalho Chehab
parent cdcb12e78a
commit 262912335c
1 changed files with 8 additions and 8 deletions
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16
drivers/media/rc/rc-main.c
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@ -1286,14 +1286,6 @@ int rc_register_device(struct rc_dev *dev)
if (dev->close)
dev->input_dev->close = ir_close;
/*
* Take the lock here, as the device sysfs node will appear
* when device_add() is called, which may trigger an ir-keytable udev
* rule, which will in turn call show_protocols and access
* dev->enabled_protocols before it has been initialized.
*/
mutex_lock(&dev->lock);
do {
devno = find_first_zero_bit(ir_core_dev_number,
IRRCV_NUM_DEVICES);
@ -1302,6 +1294,14 @@ int rc_register_device(struct rc_dev *dev)
return -ENOMEM;
} while (test_and_set_bit(devno, ir_core_dev_number));
/*
* Take the lock here, as the device sysfs node will appear
* when device_add() is called, which may trigger an ir-keytable udev
* rule, which will in turn call show_protocols and access
* dev->enabled_protocols before it has been initialized.
*/
mutex_lock(&dev->lock);
dev->devno = devno;
dev_set_name(&dev->dev, "rc%ld", dev->devno);
dev_set_drvdata(&dev->dev, dev);