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path: root/drivers/firewire/fw-cdev.c
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Diffstat (limited to 'drivers/firewire/fw-cdev.c')
-rw-r--r--drivers/firewire/fw-cdev.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index 7e73cbaa4121..46bc197a047f 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -109,15 +109,17 @@ static int fw_device_op_open(struct inode *inode, struct file *file)
struct client *client;
unsigned long flags;
- device = fw_device_from_devt(inode->i_rdev);
+ device = fw_device_get_by_devt(inode->i_rdev);
if (device == NULL)
return -ENODEV;
client = kzalloc(sizeof(*client), GFP_KERNEL);
- if (client == NULL)
+ if (client == NULL) {
+ fw_device_put(device);
return -ENOMEM;
+ }
- client->device = fw_device_get(device);
+ client->device = device;
INIT_LIST_HEAD(&client->event_list);
INIT_LIST_HEAD(&client->resource_list);
spin_lock_init(&client->lock);
@@ -644,6 +646,10 @@ static int ioctl_create_iso_context(struct client *client, void *buffer)
struct fw_cdev_create_iso_context *request = buffer;
struct fw_iso_context *context;
+ /* We only support one context at this time. */
+ if (client->iso_context != NULL)
+ return -EBUSY;
+
if (request->channel > 63)
return -EINVAL;
@@ -790,8 +796,9 @@ static int ioctl_start_iso(struct client *client, void *buffer)
{
struct fw_cdev_start_iso *request = buffer;
- if (request->handle != 0)
+ if (client->iso_context == NULL || request->handle != 0)
return -EINVAL;
+
if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
if (request->tags == 0 || request->tags > 15)
return -EINVAL;
@@ -808,7 +815,7 @@ static int ioctl_stop_iso(struct client *client, void *buffer)
{
struct fw_cdev_stop_iso *request = buffer;
- if (request->handle != 0)
+ if (client->iso_context == NULL || request->handle != 0)
return -EINVAL;
return fw_iso_context_stop(client->iso_context);