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firewire: cdev: fix race of fw_device_op_release with bus reset 

Unlink the client from the fw_device earlier in order to prevent bus
reset events being added to client->event_list during shutdown.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2008-12-14 19:19:23 +01:00
parent 1f3125af8e
commit 97811e3473
1 changed files with 4 additions and 4 deletions
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8
drivers/firewire/fw-cdev.c
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@ -1009,6 +1009,10 @@ static int fw_device_op_release(struct inode *inode, struct file *file)
struct event *e, *next_e;
struct client_resource *r, *next_r;
mutex_lock(&client->device->client_list_mutex);
list_del(&client->link);
mutex_unlock(&client->device->client_list_mutex);
if (client->buffer.pages)
fw_iso_buffer_destroy(&client->buffer, client->device->card);
@ -1026,10 +1030,6 @@ static int fw_device_op_release(struct inode *inode, struct file *file)
list_for_each_entry_safe(e, next_e, &client->event_list, link)
kfree(e);
mutex_lock(&client->device->client_list_mutex);
list_del(&client->link);
mutex_unlock(&client->device->client_list_mutex);
fw_device_put(client->device);
kfree(client);