[PATCH] nvme: cancel pending I/O if nvme controller is in terminal state

[Keith Busch]

On Thu, Apr 25, 2024 at 07:33:00PM +0530, Nilay Shroff wrote:
> While I/O is running, if the pci bus error occurs then
> in-flight I/O can not complete. Worst, if at this time,
> user (logically) hot-unplug the nvme disk then the
> nvme_remove() code path can't forward progress until
> in-flight I/O is cancelled. So these sequence of events
> may potentially hang hot-unplug code path indefinitely.
> This patch helps cancel the pending/in-flight I/O from the
> nvme request timeout handler in case the nvme controller
> is in the terminal (DEAD/DELETING/DELETING_NOIO) state and
> that helps nvme_remove() code path forward progress and
> finish successfully.
> 
> Link: https://lore.kernel.org/all/199be893-5dfa-41e5-b6f2-40ac90ebccc4@linux.ibm.com/
> Signed-off-by: Nilay Shroff <nilay at linux.ibm.com>

Thanks, applied to nvme-6.9.