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@intel.com Cc: Jon Derrick jonathan.derrick@intel.com Signed-off-by: Keith Busch keith.busch@intel.com Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Scott Bauer scott.bauer@intel.com Reviewed-by: Jon Derrick jonathan.derrick@intel.com
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