[PATCH] nvme: block ioctls if controller not in a live state

[Johannes Thumshirn]

On Wed, May 09, 2018 at 04:20:19PM -0700, James Smart wrote:
> yes - but if things reach that layer, the return status for the ioctl can be
> quite different.  (if I read things right) The core routines are coded so
> that if there's a hard error, a -Exxx status will be returned. Otherwise, it
> returns the nvme_req(req)->status value (assumed positive big value). Which
> means, if the if_ready checks reject it, it'll go back with an
> NVME_SC_ABORT_REQ status. Which means the cli gets a convoluted error
> response. For the cases where it would be blocked by controller state, I
> want an -EAGAIN status so that the app knows it can retry and it should
> succeed sometime in the future.  Any other status - the app gives up and
> accepts the status value.

Ah OK, thanks for the clarification.

Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
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Johannes Thumshirn                                          Storage
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