[PATCH] nvme: add support for TP4084 - Time-to-Ready Enhancements

[Hannes Reinecke]

On 5/18/22 08:40, Christoph Hellwig wrote:
> Add support for using longer timeouts during controller initialization
> and letting the controller come up with namespaces that are not ready
> for I/O yet.  We skip these not ready namespaces during scanning and
> only bring them online once another scan is kicked off by the AEN that
> is set when the NRDY bit gets set in the  I/O Command Set Independent
> Identify Namespace Data Structure.   This asynchronous probing avoids
> blocking the kernel boot when controllers take a very long time to
> recover after unclean shutdowns (up to minutes).
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>   drivers/nvme/host/constants.c |  1 +
>   drivers/nvme/host/core.c      | 73 ++++++++++++++++++++++++++++++++---
>   drivers/nvme/host/nvme.h      |  1 +
>   include/linux/nvme.h          | 31 +++++++++++++++
>   4 files changed, 101 insertions(+), 5 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare at suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
hare at suse.de			                  +49 911 74053 688
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