diff options
Diffstat (limited to 'drivers/misc/uacce/uacce.c')
| -rw-r--r-- | drivers/misc/uacce/uacce.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c index 346bd7cf2e94..930c252753a0 100644 --- a/drivers/misc/uacce/uacce.c +++ b/drivers/misc/uacce/uacce.c @@ -166,8 +166,8 @@ static int uacce_fops_open(struct inode *inode, struct file *filep) init_waitqueue_head(&q->wait); filep->private_data = q; - uacce->inode = inode; q->state = UACCE_Q_INIT; + q->mapping = filep->f_mapping; mutex_init(&q->mutex); list_add(&q->list, &uacce->queues); mutex_unlock(&uacce->mutex); @@ -200,12 +200,15 @@ static int uacce_fops_release(struct inode *inode, struct file *filep) static void uacce_vma_close(struct vm_area_struct *vma) { struct uacce_queue *q = vma->vm_private_data; - struct uacce_qfile_region *qfr = NULL; - if (vma->vm_pgoff < UACCE_MAX_REGION) - qfr = q->qfrs[vma->vm_pgoff]; + if (vma->vm_pgoff < UACCE_MAX_REGION) { + struct uacce_qfile_region *qfr = q->qfrs[vma->vm_pgoff]; - kfree(qfr); + mutex_lock(&q->mutex); + q->qfrs[vma->vm_pgoff] = NULL; + mutex_unlock(&q->mutex); + kfree(qfr); + } } static const struct vm_operations_struct uacce_vm_ops = { @@ -574,12 +577,6 @@ void uacce_remove(struct uacce_device *uacce) if (!uacce) return; - /* - * unmap remaining mapping from user space, preventing user still - * access the mmaped area while parent device is already removed - */ - if (uacce->inode) - unmap_mapping_range(uacce->inode->i_mapping, 0, 0, 1); /* * uacce_fops_open() may be running concurrently, even after we remove @@ -597,6 +594,12 @@ void uacce_remove(struct uacce_device *uacce) uacce_put_queue(q); mutex_unlock(&q->mutex); uacce_unbind_queue(q); + + /* + * unmap remaining mapping from user space, preventing user still + * access the mmaped area while parent device is already removed + */ + unmap_mapping_range(q->mapping, 0, 0, 1); } /* disable sva now since no opened queues */ |