diff options
| author | Rajiv Andrade <srajiv@linux.vnet.ibm.com> | 2008-10-11 09:04:02 +1100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-10-11 09:04:02 +1100 |
| commit | dc36d32cc5bea5e985294c79995e10a159c3019a (patch) | |
| tree | 0eb2fb1c0127cab4275a70ef1b22fc3f22fe716a /drivers/char/tpm | |
| parent | f89c5edb86abfac4c914f4eb808b07684164eca0 (diff) | |
| download | linux-dc36d32cc5bea5e985294c79995e10a159c3019a.tar.bz2 | |
Renames num_open to is_open, as only one process can open the file at a time.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Cc: "Serge E. Hallyn" <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 7 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 2 |
2 files changed, 4 insertions, 5 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index ceba6082bd96..dfd4e7fc350b 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -978,20 +978,19 @@ int tpm_open(struct inode *inode, struct file *file) goto err_out; } - if (chip->num_opens) { + if (test_and_set_bit(0, &chip->is_open)) { dev_dbg(chip->dev, "Another process owns this TPM\n"); rc = -EBUSY; goto err_out; } - chip->num_opens++; get_device(chip->dev); spin_unlock(&driver_lock); chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL); if (chip->data_buffer == NULL) { - chip->num_opens--; + clear_bit(0, &chip->is_open); put_device(chip->dev); return -ENOMEM; } @@ -1016,7 +1015,7 @@ int tpm_release(struct inode *inode, struct file *file) file->private_data = NULL; del_singleshot_timer_sync(&chip->user_read_timer); atomic_set(&chip->data_pending, 0); - chip->num_opens--; + clear_bit(0, &chip->is_open); put_device(chip->dev); kfree(chip->data_buffer); spin_unlock(&driver_lock); diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index e885148b4cfb..2756cab9aee3 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -90,7 +90,7 @@ struct tpm_chip { struct device *dev; /* Device stuff */ int dev_num; /* /dev/tpm# */ - int num_opens; /* only one allowed */ + unsigned long is_open; /* only one allowed */ int time_expired; /* Data passed to and from the tpm via the read/write calls */ |