Commit e32bc729 authored by Dan Williams's avatar Dan Williams
Browse files

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 <vishal.l.verma@intel.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent bd032943

drivers/nvdimm/blk.c

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/nvdimm/btt.c

+6 −11
Original line number Diff line number Diff line
@@ -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);

	}

}

drivers/nvdimm/btt_devs.c

+13 −13
Original line number Diff line number Diff line
@@ -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) : "<none>");

	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) : "<none>");

	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;

drivers/nvdimm/nd.h

+4 −2
Original line number Diff line number Diff line
@@ -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;

}

drivers/nvdimm/pmem.c

+1 −1
Original line number Diff line number Diff line
@@ -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