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firewire: cdev: mark char device files as not seekable 

The <linux/firewire-cdev.h> character device file ABI (i.e. /dev/fw*
character device file interface) does not make any use of lseek(),
pread(), pwrite() (or any kind of write() at all).

Use nonseekable_open() and, redundantly, set file_operations.llseek to
no_llseek to remove any doubt whether the BKL-grabbing default_llseek
handler is used.  (Also shuffle file_operations initialization according
to the order of handler definitions.)

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2010-04-10 16:38:05 +01:00
parent 5da3dac8d9
commit 3ac26b2ee3
1 changed files with 4 additions and 4 deletions
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8
drivers/firewire/core-cdev.c
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@ -226,7 +226,7 @@ static int fw_device_op_open(struct inode *inode, struct file *file)
list_add_tail(&client->link, &device->client_list);
mutex_unlock(&device->client_list_mutex);
return 0;
return nonseekable_open(inode, file);
}
static void queue_event(struct client *client, struct event *event,
@ -1495,13 +1495,13 @@ static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
const struct file_operations fw_device_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = fw_device_op_open,
.read = fw_device_op_read,
.unlocked_ioctl = fw_device_op_ioctl,
.poll = fw_device_op_poll,
.release = fw_device_op_release,
.mmap = fw_device_op_mmap,
.release = fw_device_op_release,
.poll = fw_device_op_poll,
#ifdef CONFIG_COMPAT
.compat_ioctl = fw_device_op_compat_ioctl,
#endif