From: Dan Williams Date: Fri, 18 Mar 2016 01:23:09 +0000 (-0700) Subject: libnvdimm, btt, convert nd_btt_probe() to devm X-Git-Tag: v4.7-rc1~78^2~4^2~14 X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=e32bc729a3a486e20443db3379ecf67240b20616;p=cascardo%2Flinux.git libnvdimm, btt, convert nd_btt_probe() to devm Pass the device performing the probe so we can use a devm allocation for the btt superblock. Cc: Vishal Verma Reviewed-by: Johannes Thumshirn Signed-off-by: Dan Williams --- diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c index 24649396b638..c8215dc356cc 100644 --- a/drivers/nvdimm/blk.c +++ b/drivers/nvdimm/blk.c @@ -314,7 +314,7 @@ static int nd_blk_probe(struct device *dev) ndns->rw_bytes = nd_blk_rw_bytes; if (is_nd_btt(dev)) rc = nvdimm_namespace_attach_btt(ndns); - else if (nd_btt_probe(ndns, blk_dev) == 0) { + else if (nd_btt_probe(dev, ndns, blk_dev) == 0) { /* we'll come back as btt-blk */ rc = -ENXIO; } else diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index 676c31a8fb6d..cc9fafed9362 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -1306,7 +1306,7 @@ static struct btt *btt_init(struct nd_btt *nd_btt, unsigned long long rawsize, struct btt *btt; struct device *dev = &nd_btt->dev; - btt = kzalloc(sizeof(struct btt), GFP_KERNEL); + btt = devm_kzalloc(dev, sizeof(struct btt), GFP_KERNEL); if (!btt) return NULL; @@ -1321,13 +1321,13 @@ static struct btt *btt_init(struct nd_btt *nd_btt, unsigned long long rawsize, ret = discover_arenas(btt); if (ret) { dev_err(dev, "init: error in arena_discover: %d\n", ret); - goto out_free; + return NULL; } if (btt->init_state != INIT_READY && nd_region->ro) { dev_info(dev, "%s is read-only, unable to init btt metadata\n", dev_name(&nd_region->dev)); - goto out_free; + return NULL; } else if (btt->init_state != INIT_READY) { btt->num_arenas = (rawsize / ARENA_MAX_SIZE) + ((rawsize % ARENA_MAX_SIZE) ? 1 : 0); @@ -1337,29 +1337,25 @@ static struct btt *btt_init(struct nd_btt *nd_btt, unsigned long long rawsize, ret = create_arenas(btt); if (ret) { dev_info(dev, "init: create_arenas: %d\n", ret); - goto out_free; + return NULL; } ret = btt_meta_init(btt); if (ret) { dev_err(dev, "init: error in meta_init: %d\n", ret); - goto out_free; + return NULL; } } ret = btt_blk_init(btt); if (ret) { dev_err(dev, "init: error in blk_init: %d\n", ret); - goto out_free; + return NULL; } btt_debugfs_init(btt); return btt; - - out_free: - kfree(btt); - return NULL; } /** @@ -1377,7 +1373,6 @@ static void btt_fini(struct btt *btt) btt_blk_cleanup(btt); free_arenas(btt); debugfs_remove_recursive(btt->debugfs_dir); - kfree(btt); } } diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c index cb477518dd0e..1886171af80e 100644 --- a/drivers/nvdimm/btt_devs.c +++ b/drivers/nvdimm/btt_devs.c @@ -273,10 +273,11 @@ static int __nd_btt_probe(struct nd_btt *nd_btt, return 0; } -int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata) +int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns, + void *drvdata) { int rc; - struct device *dev; + struct device *btt_dev; struct btt_sb *btt_sb; struct nd_region *nd_region = to_nd_region(ndns->dev.parent); @@ -284,21 +285,20 @@ int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata) return -ENODEV; nvdimm_bus_lock(&ndns->dev); - dev = __nd_btt_create(nd_region, 0, NULL, ndns); + btt_dev = __nd_btt_create(nd_region, 0, NULL, ndns); nvdimm_bus_unlock(&ndns->dev); - if (!dev) + if (!btt_dev) return -ENOMEM; - dev_set_drvdata(dev, drvdata); - btt_sb = kzalloc(sizeof(*btt_sb), GFP_KERNEL); - rc = __nd_btt_probe(to_nd_btt(dev), ndns, btt_sb); - kfree(btt_sb); - dev_dbg(&ndns->dev, "%s: btt: %s\n", __func__, - rc == 0 ? dev_name(dev) : ""); + dev_set_drvdata(btt_dev, drvdata); + btt_sb = devm_kzalloc(dev, sizeof(*btt_sb), GFP_KERNEL); + rc = __nd_btt_probe(to_nd_btt(btt_dev), ndns, btt_sb); + dev_dbg(dev, "%s: btt: %s\n", __func__, + rc == 0 ? dev_name(btt_dev) : ""); if (rc < 0) { - struct nd_btt *nd_btt = to_nd_btt(dev); + struct nd_btt *nd_btt = to_nd_btt(btt_dev); - __nd_detach_ndns(dev, &nd_btt->ndns); - put_device(dev); + __nd_detach_ndns(btt_dev, &nd_btt->ndns); + put_device(btt_dev); } return rc; diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index c831caa3d60a..0fb14890ba26 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -197,11 +197,13 @@ struct nd_gen_sb { u64 nd_sb_checksum(struct nd_gen_sb *sb); #if IS_ENABLED(CONFIG_BTT) -int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata); +int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns, + void *drvdata); bool is_nd_btt(struct device *dev); struct device *nd_btt_create(struct nd_region *nd_region); #else -static inline int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata) +static inline int nd_btt_probe(struct device *dev, + struct nd_namespace_common *ndns, void *drvdata) { return -ENODEV; } diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 4d8f5c55aade..6fa39f55dbe3 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -574,7 +574,7 @@ static int nd_pmem_probe(struct device *dev) if (is_nd_pfn(dev)) return nvdimm_namespace_attach_pfn(ndns); - if (nd_btt_probe(ndns, pmem) == 0 + if (nd_btt_probe(dev, ndns, pmem) == 0 || nd_pfn_probe(dev, ndns, pmem) == 0) { /* * We'll come back as either btt-pmem, or pfn-pmem, so