diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hid/bpf/hid_bpf_struct_ops.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/hid/bpf/hid_bpf_struct_ops.c b/drivers/hid/bpf/hid_bpf_struct_ops.c index 56c53aca4511..c90b68956cb3 100644 --- a/drivers/hid/bpf/hid_bpf_struct_ops.c +++ b/drivers/hid/bpf/hid_bpf_struct_ops.c @@ -256,6 +256,11 @@ static void hid_bpf_unreg(void *kdata, struct bpf_link *link) mutex_lock(&hdev->bpf.prog_list_lock); + if (!ops->hdev) { + mutex_unlock(&hdev->bpf.prog_list_lock); + return; + } + list_del_rcu(&ops->list); synchronize_srcu(&hdev->bpf.srcu); ops->hdev = NULL; @@ -316,13 +321,17 @@ static struct bpf_struct_ops bpf_hid_bpf_ops = { void __hid_bpf_ops_destroy_device(struct hid_device *hdev) { struct hid_bpf_ops *e; + int count = 0; - rcu_read_lock(); - list_for_each_entry_rcu(e, &hdev->bpf.prog_list, list) { - hid_put_device(hdev); + mutex_lock(&hdev->bpf.prog_list_lock); + list_for_each_entry(e, &hdev->bpf.prog_list, list) { e->hdev = NULL; + count++; } - rcu_read_unlock(); + mutex_unlock(&hdev->bpf.prog_list_lock); + + while (count--) + hid_put_device(hdev); } static int __init hid_bpf_struct_ops_init(void) |