Just stash away the DMRL value in the nvme_ctrl struture, and leave
all interpretation to nvme_config_discard, where we know DSM is
supported by the time we're configuring the number of segments.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/nvme/host/core.c | 13 +++++--------
drivers/nvme/host/nvme.h | 2 +-
2 files changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 05372bec3b7aff..f5814aa1b33910 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1736,7 +1736,10 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns)
queue->limits.discard_granularity = size;
- blk_queue_max_discard_segments(queue, ctrl->max_discard_segments);
+ if (ctrl->dmrl)
+ blk_queue_max_discard_segments(queue, ctrl->dmrl);
+ else
+ blk_queue_max_discard_segments(queue, NVME_DSM_MAX_RANGES);
if (ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES)
blk_queue_max_write_zeroes_sectors(queue, UINT_MAX);
@@ -2871,11 +2874,6 @@ static int nvme_init_non_mdts_limits(struct nvme_ctrl *ctrl)
struct nvme_id_ctrl_nvm *id;
int ret;
- if (ctrl->oncs & NVME_CTRL_ONCS_DSM)
- ctrl->max_discard_segments = NVME_DSM_MAX_RANGES;
- else
- ctrl->max_discard_segments = 0;
-
/*
* Even though NVMe spec explicitly states that MDTS is not applicable
* to the write-zeroes, we are cautious and limit the size to the
@@ -2905,8 +2903,7 @@ static int nvme_init_non_mdts_limits(struct nvme_ctrl *ctrl)
if (ret)
goto free_data;
- if (id->dmrl)
- ctrl->max_discard_segments = id->dmrl;
+ ctrl->dmrl = id->dmrl;
ctrl->dmrsl = le32_to_cpu(id->dmrsl);
if (id->wzsl)
ctrl->max_zeroes_sectors = nvme_mps_to_sectors(ctrl, id->wzsl);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index d59ed2ba1c37ca..1bfe172f9268a0 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -296,13 +296,13 @@ struct nvme_ctrl {
u32 max_hw_sectors;
u32 max_segments;
u32 max_integrity_segments;
- u32 max_discard_segments;
u32 max_zeroes_sectors;
#ifdef CONFIG_BLK_DEV_ZONED
u32 max_zone_append;
#endif
u16 crdt[3];
u16 oncs;
+ u8 dmrl;
u32 dmrsl;
u16 oacs;
u16 sqsize;
--
2.39.2
