diff options
| author | David S. Miller <davem@davemloft.net> | 2010-02-17 06:09:29 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-17 06:09:29 (GMT) |
| commit | 2bb4646fce8d09916b351d1a62f98db7cec6fc41 (patch) | |
| tree | c1f0d002e69868606eca9d1b919835f422892063 /drivers/hwmon/fschmd.c | |
| parent | 6836b9bdd98e3b500cd49512484df68f46e14659 (diff) | |
| parent | b0483e78e5c4c9871fc5541875b3bc006846d46b (diff) | |
| download | linux-fsl-qoriq-2bb4646fce8d09916b351d1a62f98db7cec6fc41.tar.xz | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'drivers/hwmon/fschmd.c')
| -rw-r--r-- | drivers/hwmon/fschmd.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c index bd0fc67..fa07282 100644 --- a/drivers/hwmon/fschmd.c +++ b/drivers/hwmon/fschmd.c @@ -768,6 +768,7 @@ leave: static int watchdog_open(struct inode *inode, struct file *filp) { struct fschmd_data *pos, *data = NULL; + int watchdog_is_open; /* We get called from drivers/char/misc.c with misc_mtx hold, and we call misc_register() from fschmd_probe() with watchdog_data_mutex @@ -782,10 +783,12 @@ static int watchdog_open(struct inode *inode, struct file *filp) } } /* Note we can never not have found data, so we don't check for this */ - kref_get(&data->kref); + watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open); + if (!watchdog_is_open) + kref_get(&data->kref); mutex_unlock(&watchdog_data_mutex); - if (test_and_set_bit(0, &data->watchdog_is_open)) + if (watchdog_is_open) return -EBUSY; /* Start the watchdog */ |