[PATCH v4 1/1] nvme: handle persistent internal error AER from NVMe controller

[Michael Kelley (LINUX)]

From: Chaitanya Kulkarni <chaitanyak at nvidia.com>
> 
> On 6/8/22 17:22, Chaitanya Kulkarni wrote:
> > On 6/8/22 11:52, Michael Kelley wrote:
> >> In the NVM Express Revision 1.4 spec, Figure 145 describes possible
> >> values for an AER with event type "Error" (value 000b). For a
> >> Persistent Internal Error (value 03h), the host should perform a
> >> controller reset.
> >>
> >> Add support for this error using code that already exists for
> >> doing a controller reset. As part of this support, introduce
> >> two utility functions for parsing the AER type and subtype.
> >>
> >> This new support was tested in a lab environment where we can
> >> generate the persistent internal error on demand, and observe
> >> both the Linux side and NVMe controller side to see that the
> >> controller reset has been done.
> >>
> >>
> 
> Can you please clarify that which transports you have tested
> such as RDMA, TCP, and PCIe ?
> 

I've tested PCIe only -- that's all I have access to.  I can tweak
the commit message to be more specific.

Michael