Re: [PATCH] pci: add pci_dev_is_alive API

[Lukas Wunner]

On Wed, May 26, 2021 at 02:12:38PM +0800, Lambert Wang wrote:
> The user is our new PCI driver under development for WWAN devices .
> Surprise removal could happen under multiple circumstances.
> e.g. Exception, Link Failure, etc.
> 
> We wanted this API to detect surprise removal or check device recovery
> when AER and Hotplug are disabled.

You may want to take a look at pci_dev_is_disconnected().

Be aware of its limitations, which Bjorn has already pointed out
and which are discussed in more detail under the following link
in the "Surprise removal" section:

https://lwn.net/Articles/767885/

Thanks,

Lukas