When nvme devices were removed, we need to handle the targets build upon them properly: remove the existing targets, block creations of new ones. To do this clean up job well, we need to change the interface between nvme and lightnvm.
Signed-off-by: Wenwei Tao <[email protected]> --- drivers/nvme/host/lightnvm.c | 17 ++++++++++++++++- drivers/nvme/host/nvme.h | 1 + drivers/nvme/host/pci.c | 10 ++++++---- 3 files changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index e0b7b95..3f4ffb7 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -468,6 +468,14 @@ static void nvme_nvm_dev_dma_free(void *pool, void *ppa_list, dma_pool_free(pool, ppa_list, dma_handler); } +static void nvme_nvm_dev_remove(struct request_queue *q) +{ + struct nvme_ns *ns = q->queuedata; + + kref_put(&ns->kref, nvme_free_ns); + +} + static struct nvm_dev_ops nvme_nvm_dev_ops = { .identity = nvme_nvm_identity, @@ -482,13 +490,20 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = { .destroy_dma_pool = nvme_nvm_destroy_dma_pool, .dev_dma_alloc = nvme_nvm_dev_dma_alloc, .dev_dma_free = nvme_nvm_dev_dma_free, + .dev_remove = nvme_nvm_dev_remove, .max_phys_sect = 64, }; int nvme_nvm_register(struct request_queue *q, char *disk_name) { - return nvm_register(q, disk_name, &nvme_nvm_dev_ops); + int ret; + struct nvme_ns *ns = q->queuedata; + + ret = nvm_register(q, disk_name, &nvme_nvm_dev_ops); + if (!ret) + kref_get(&ns->kref); + return ret; } void nvme_nvm_unregister(struct request_queue *q, char *disk_name) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index fdb4e5b..251ec9d 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -116,6 +116,7 @@ static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector) return (sector >> (ns->lba_shift - 9)); } +void nvme_free_ns(struct kref *kref); int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, void *buf, unsigned bufflen); int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 8187df2..f63223d 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1960,13 +1960,10 @@ static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, #endif static void nvme_free_dev(struct kref *kref); -static void nvme_free_ns(struct kref *kref) +void nvme_free_ns(struct kref *kref) { struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); - if (ns->type == NVME_NS_LIGHTNVM) - nvme_nvm_unregister(ns->queue, ns->disk->disk_name); - spin_lock(&dev_list_lock); ns->disk->private_data = NULL; spin_unlock(&dev_list_lock); @@ -2533,6 +2530,11 @@ static void nvme_ns_remove(struct nvme_ns *ns) { bool kill = nvme_io_incapable(ns->dev) && !blk_queue_dying(ns->queue); + if (ns->type == NVME_NS_LIGHTNVM) { + nvme_nvm_unregister(ns->queue, ns->disk->disk_name); + ns->type = 0; + } + if (kill) blk_set_queue_dying(ns->queue); if (ns->disk->flags & GENHD_FL_UP) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
