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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-05-13 21:42:14 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-05-17 14:13:47 +0200 |
| commit | 92368890d551794ee8d7e90477d8498bb7f82a9b (patch) | |
| tree | 0c9fe72c0d770ce4ac358235fafd18803415b1ac /drivers/firewire/fw-cdev.c | |
| parent | 32a0f488ce5e8a9a148491f15edc508ab5e8265b (diff) | |
firewire: core: improve check for local node
My recently added test for a device being local in fw-cdev.c got it
slightly wrong: Comparisons of node IDs are only valid if the
generation is current, which I forgot to check. Normally, serialization
by card->lock takes care of this, but a device in FW_DEVICE_GONE state
will necessarily have a wrong generation and invalid node_id.
The "is it local?" check is made 100% correct and simpler now by means
of a struct fw_device flag which is set at fw_device creation.
Besides the fw-cdev site which was to be fixed, there is another site
which can make use of the new flag, and an RFC-2734 driver will benefit
from it too.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/fw-cdev.c')
| -rw-r--r-- | drivers/firewire/fw-cdev.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c index 7eb6594cc3e5..8a5e6ae2552c 100644 --- a/drivers/firewire/fw-cdev.c +++ b/drivers/firewire/fw-cdev.c @@ -739,15 +739,11 @@ static void release_descriptor(struct client *client, static int ioctl_add_descriptor(struct client *client, void *buffer) { struct fw_cdev_add_descriptor *request = buffer; - struct fw_card *card = client->device->card; struct descriptor_resource *r; int ret; /* Access policy: Allow this ioctl only on local nodes' device files. */ - spin_lock_irq(&card->lock); - ret = client->device->node_id != card->local_node->node_id; - spin_unlock_irq(&card->lock); - if (ret) + if (!client->device->is_local) return -ENOSYS; if (request->length > 256) |