[PATCH] nvme: honour O_NONBLOCK during resetting

[Chaitanya Kulkarni]

On 11/11/2021 2:59 AM, Hannes Reinecke wrote:
> When opening a controller device node we should honour the O_NONBLOCK
> flag to allow the device to be openend even if it's in state 'resetting'
> or 'connecting'. This allows user-space applications to use a call to 'open'
> to figure out if the controller is present, even if it's currently
> undergoing a reset.
> 
> Signed-off-by: Hannes Reinecke <hare at suse.de>

Will resetting and connecting ever result is deleting the controller due
to error cases present in that path ?

If yes then application will have handle for something that might
go away in the future, should allow such a semantic ?

-ck