Re: [Xen-devel][PATCH 1/2] xen/gntdev: Do not destroy context while dma-bufs are in use

[Boris Ostrovsky]

On 2/15/19 10:07 AM, Oleksandr Andrushchenko wrote:
> On 2/15/19 5:03 PM, Boris Ostrovsky wrote:
>> On 2/14/19 9:23 AM, Oleksandr Andrushchenko wrote:
>>> Â Â /* DMA buffer export support. */
>>> @@ -311,6 +317,7 @@ static void dmabuf_exp_release(struct kref *kref)
>>> Â ÂÂÂÂÂ dmabuf_exp_wait_obj_signal(gntdev_dmabuf->priv, gntdev_dmabuf);
>>> ÂÂÂÂÂ list_del(&gntdev_dmabuf->next);
>>> +ÂÂÂ fput(gntdev_dmabuf->priv->filp);
>>> ÂÂÂÂÂ kfree(gntdev_dmabuf);
>>> Â }
>>> Â @@ -423,6 +430,7 @@ static int dmabuf_exp_from_pages(struct
>>> gntdev_dmabuf_export_args *args)
>>> ÂÂÂÂÂ mutex_lock(&args->dmabuf_priv->lock);
>>> ÂÂÂÂÂ list_add(&gntdev_dmabuf->next, &args->dmabuf_priv->exp_list);
>>> ÂÂÂÂÂ mutex_unlock(&args->dmabuf_priv->lock);
>>> +ÂÂÂ get_file(gntdev_dmabuf->priv->filp);
>> Not fget()?
> fget wants file descriptor [1] and returns struct file *,
> but we already have struct file*, so I use get_file [2]
> which does what I need - increments the reference counter
> on the file


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>