From cdb98c2698b4af287925abcba4d77d92af82a0c3 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 13 Dec 2016 19:53:37 -0800 Subject: [PATCH] Revert "nvme: add support for the Write Zeroes command" This reverts commit 6d31e3ba232ea22458b2f36b6d3f2f9f11bf3fa4. This causes bootup problems for me both on my laptop and my desktop. What they have in common is that they have NVMe disks with dm-crypt, but it's not the same controller, so it's not controller-specific. Jens does not see it on his machine (also NVMe), so it's presumably something that triggers just on bootup. Possibly related to dm-crypt and the fact that I mark my luks volume with "allow-discards" in /etc/crypttab. It's 100% repeatable for me, which made it fairly straightforward to bisect the problem to this commit. Small mercies. So we don't know what the reason is yet, but the revert is needed to get things going again. Acked-by: Jens Axboe Cc: Chaitanya Kulkarni Cc: Christoph Hellwig Signed-off-by: Linus Torvalds --- drivers/nvme/host/core.c | 21 --------------------- 1 file changed, 21 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 35b3fee5a453..b40cfb076f02 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -263,21 +263,6 @@ static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req, return BLK_MQ_RQ_QUEUE_OK; } -static inline void nvme_setup_write_zeroes(struct nvme_ns *ns, - struct request *req, struct nvme_command *cmnd) -{ - struct nvme_write_zeroes_cmd *write_zeroes = &cmnd->write_zeroes; - - memset(cmnd, 0, sizeof(*cmnd)); - write_zeroes->opcode = nvme_cmd_write_zeroes; - write_zeroes->nsid = cpu_to_le32(ns->ns_id); - write_zeroes->slba = - cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); - write_zeroes->length = - cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); - write_zeroes->control = 0; -} - static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, struct nvme_command *cmnd) { @@ -330,8 +315,6 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, nvme_setup_flush(ns, cmd); else if (req_op(req) == REQ_OP_DISCARD) ret = nvme_setup_discard(ns, req, cmd); - else if (req_op(req) == REQ_OP_WRITE_ZEROES) - nvme_setup_write_zeroes(ns, req, cmd); else nvme_setup_rw(ns, req, cmd); @@ -952,10 +935,6 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM) nvme_config_discard(ns); - if (ns->ctrl->oncs & NVME_CTRL_ONCS_WRITE_ZEROES) - blk_queue_max_write_zeroes_sectors(ns->queue, - ((u32)(USHRT_MAX + 1) * bs) >> 9); - blk_mq_unfreeze_queue(disk->queue); } -- 2.30.2