From: Keith Busch kbusch@kernel.org
[ Upstream commit d3205ab75e99a47539ec91ef85ba488f4ddfeaa9 ]
The device can report discard support without setting the ONCS DSM bit. When not set, the driver clears max_discard_size expecting it to be set later. We don't know the size until we have the namespace format, though, so setting it is deferred until configuring one, but the driver was abandoning the discard settings due to that initial clearing.
Move the max_discard_size calculation above the check for a '0' discard size.
Fixes: 1a86924e4f46475 ("nvme: fix interpretation of DMRSL") Reported-by: Laurence Oberman loberman@redhat.com Signed-off-by: Keith Busch kbusch@kernel.org Reviewed-by: Niklas Cassel niklas.cassel@wdc.com Reviewed-by: Sagi Grimberg sagi@grimberg.me Tested-by: Laurence Oberman loberman@redhat.com Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index a95e48b51da66..cb71ce3413c2d 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1711,6 +1711,9 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns) struct request_queue *queue = disk->queue; u32 size = queue_logical_block_size(queue);
+ if (ctrl->dmrsl && ctrl->dmrsl <= nvme_sect_to_lba(ns, UINT_MAX)) + ctrl->max_discard_sectors = nvme_lba_to_sect(ns, ctrl->dmrsl); + if (ctrl->max_discard_sectors == 0) { blk_queue_max_discard_sectors(queue, 0); return; @@ -1725,9 +1728,6 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns) if (queue->limits.max_discard_sectors) return;
- if (ctrl->dmrsl && ctrl->dmrsl <= nvme_sect_to_lba(ns, UINT_MAX)) - ctrl->max_discard_sectors = nvme_lba_to_sect(ns, ctrl->dmrsl); - blk_queue_max_discard_sectors(queue, ctrl->max_discard_sectors); blk_queue_max_discard_segments(queue, ctrl->max_discard_segments);