RE: [PATCH] PCI/DOE: Remove asynchronous task support

[Zhuo, Qiuxu]

> From: Ira Weiny <ira.weiny@xxxxxxxxx>
＞　...
> 
> @@ -423,25 +399,13 @@ struct pci_doe_mb
> *pcim_doe_create_mb(struct pci_dev *pdev, u16 cap_offset)
>  	doe_mb->pdev = pdev;
>  	doe_mb->cap_offset = cap_offset;
>  	init_waitqueue_head(&doe_mb->wq);
> +	mutex_init(&doe_mb->exec_lock);

In real world, not sure whether there is a case that pcim_doe_create_mb() is invoked by 
multiple drivers to create multiple DOE mailbox instances? If there is such a case, we may 
need to ensure there is only one DOE mailbox instance for a physical DOE of pdev @cap_offset.

-Qiuxu