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-rw-r--r--drivers/nvme/host/core.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ed163c539767..9854f5dbcf4a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4899,7 +4899,13 @@ int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
memset(set, 0, sizeof(*set));
set->ops = ops;
set->queue_depth = ctrl->sqsize + 1;
- if (ctrl->ops->flags & NVME_F_FABRICS)
+ /*
+ * Some Apple controllers requires tags to be unique across admin and
+ * the (only) I/O queue, so reserve the first 32 tags of the I/O queue.
+ */
+ if (ctrl->quirks & NVME_QUIRK_SHARED_TAGS)
+ set->reserved_tags = NVME_AQ_DEPTH;
+ else if (ctrl->ops->flags & NVME_F_FABRICS)
set->reserved_tags = NVMF_RESERVED_TAGS;
set->numa_node = ctrl->numa_node;
set->flags = BLK_MQ_F_SHOULD_MERGE;