[PATCH] nvdimm: cleanup resources when the initialization fails

From: Wu Bo <wubo40(a)huawei.com&gt; When the initialization fails, add the cleanup resources in pmem_attach_disk() function Signed-off-by: Wu Bo <wubo40(a)huawei.com&gt; --- drivers/nvdimm/pmem.c | 44 +++++++++++++++++++++++++++++++------------- 1 file changed, 31 insertions(+), 13 deletions(-) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 2df6994..f235a59 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -383,7 +383,7 @@ static int pmem_attach_disk(struct device *dev, struct device *gendev; struct gendisk *disk; void *addr; - int rc; + int rc = -ENOMEM; unsigned long flags = 0UL; pmem = devm_kzalloc(dev, sizeof(*pmem), GFP_KERNEL); @@ -392,14 +392,14 @@ static int pmem_attach_disk(struct device *dev, rc = devm_namespace_enable(dev, ndns, nd_info_block_reserve()); if (rc) - return rc; + goto out_free_pmem; /* while nsio_rw_bytes is active, parse a pfn info block if present */ if (is_nd_pfn(dev)) { nd_pfn = to_nd_pfn(dev); rc = nvdimm_setup_pfn(nd_pfn, &pmem->pgmap); if (rc) - return rc; + goto out_free_pmem; } /* we're attaching a block device, disable raw namespace access */ @@ -417,12 +417,13 @@ static int pmem_attach_disk(struct device *dev, if (!devm_request_mem_region(dev, res->start, resource_size(res), dev_name(&ndns->dev))) { dev_warn(dev, "could not reserve region %pR\n", res); - return -EBUSY; + rc = -EBUSY; + goto out_free_pmem; } q = blk_alloc_queue(pmem_make_request, dev_to_node(dev)); if (!q) - return -ENOMEM; + goto out_realease_mem_region; pmem->pfn_flags = PFN_DEV; pmem->pgmap.ref = &q->q_usage_counter; @@ -447,14 +448,16 @@ static int pmem_attach_disk(struct device *dev, } else { if (devm_add_action_or_reset(dev, pmem_release_queue, &pmem->pgmap)) - return -ENOMEM; + goto out_cleanup_queue; addr = devm_memremap(dev, pmem->phys_addr, pmem->size, ARCH_MEMREMAP_PMEM); memcpy(&bb_res, &nsio->res, sizeof(bb_res)); } - if (IS_ERR(addr)) - return PTR_ERR(addr); + if (IS_ERR(addr)) { + rc = PTR_ERR(addr); + goto out_cleanup_queue; + } pmem->virt_addr = addr; blk_queue_write_cache(q, true, fua); @@ -468,7 +471,7 @@ static int pmem_attach_disk(struct device *dev, disk = alloc_disk_node(0, nid); if (!disk) - return -ENOMEM; + goto out_cleanup_queue; pmem->disk = disk; disk->fops = &pmem_fops; @@ -479,7 +482,7 @@ static int pmem_attach_disk(struct device *dev, set_capacity(disk, (pmem->size - pmem->pfn_pad - pmem->data_offset) / 512); if (devm_init_badblocks(dev, &pmem->bb)) - return -ENOMEM; + goto out_put_disk; nvdimm_badblocks_populate(nd_region, &pmem->bb, &bb_res); disk->bb = &pmem->bb; @@ -487,8 +490,8 @@ static int pmem_attach_disk(struct device *dev, flags = DAXDEV_F_SYNC; dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops, flags); if (IS_ERR(dax_dev)) { - put_disk(disk); - return PTR_ERR(dax_dev); + rc = PTR_ERR(dax_dev); + goto out_badblock_exit; } dax_write_cache(dax_dev, nvdimm_has_cache(nd_region)); pmem->dax_dev = dax_dev; @@ -497,7 +500,7 @@ static int pmem_attach_disk(struct device *dev, device_add_disk(dev, disk, NULL); if (devm_add_action_or_reset(dev, pmem_release_disk, pmem)) - return -ENOMEM; + goto out_free_dax; revalidate_disk(disk); @@ -507,6 +510,21 @@ static int pmem_attach_disk(struct device *dev, dev_warn(dev, "'badblocks' notification disabled\n"); return 0; + +out_free_dax: + del_gendisk(disk); + put_dax(dax_dev); +out_badblock_exit: + badblocks_exit(&pmem->bb); +out_put_disk: + put_disk(disk); +out_cleanup_queue: + blk_cleanup_queue(q); +out_realease_mem_region: + devm_release_mem_region(dev, res->start, resource_size(res)); +out_free_pmem: + devm_kfree(dev, pmem); + return rc; } static int nd_pmem_probe(struct device *dev) -- 1.8.3.1