On Thu, Jul 12, 2018 at 03:27:17PM -0600, Scott Bauer wrote:
> Commit 815c6704bf9f1c59f3a6be380a4032b9c57b12f1 upstream.
>
> The controller memory buffer is remapped into a kernel address on each
> reset, but the driver was setting the submission queue base address
> only on the very first queue creation. The remapped address is likely to
> change after a reset, so accessing the old address will hit a kernel bug.
>
> This patch fixes that by setting the queue's CMB base address each time
> the queue is created.
>
> Fixes: f63572dff1421 ("nvme: unmap CMB and remove sysfs file in reset path")
> Reported-by: Christian Black <christian.d.black@xxxxxxxxx>
> Cc: Jon Derrick <jonathan.derrick@xxxxxxxxx>
> Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Scott Bauer <scott.bauer@xxxxxxxxx>
> Reviewed-by: Jon Derrick <jonathan.derrick@xxxxxxxxx>
> ---
> drivers/nvme/host/pci.c | 27 ++++++++++++++++-----------
> 1 file changed, 16 insertions(+), 11 deletions(-)
"backport" to where? What kernel tree(s) do you want this applied to?
I need a hint please...
thanks,
greg k-h
