RE: [Linux-nvdimm] [PATCH v2 07/20] libnd, nd_dimm: dimm driver and base libnd device-driver infrastructure

-----Original Message----- From: Linux-nvdimm [mailto:linux-nvdimm-bounces@lists.01.org] On Behalf Of Dan Williams Sent: Tuesday, April 28, 2015 1:25 PM To: linux-nvdimm(a)lists.01.org Cc: Neil Brown; Greg KH; linux-kernel(a)vger.kernel.org Subject: [Linux-nvdimm] [PATCH v2 07/20] libnd, nd_dimm: dimm driver and base libnd device-driver infrastructure

diff --git a/drivers/block/nd/dimm.c b/drivers/block/nd/dimm.c new file mode 100644 index 000000000000..a4c8e3ffe97c --- /dev/null +++ b/drivers/block/nd/dimm.c @@ -0,0 +1,93 @@ +/* + * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/vmalloc.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/sizes.h> +#include <linux/ndctl.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/nd.h> +#include "nd.h" + +static void free_data(struct nd_dimm_drvdata *ndd) +{ + if (!ndd) + return; + + if (ndd->data && is_vmalloc_addr(ndd->data)) + vfree(ndd->data); + else + kfree(ndd->data); + kfree(ndd); +} + +static int nd_dimm_probe(struct device *dev) +{ + struct nd_dimm_drvdata *ndd; + int rc; + + ndd = kzalloc(sizeof(*ndd), GFP_KERNEL); + if (!ndd) + return -ENOMEM; + + dev_set_drvdata(dev, ndd); + ndd->dev = dev; + + rc = nd_dimm_init_nsarea(ndd); + if (rc) + goto err; + + rc = nd_dimm_init_config_data(ndd); + if (rc) + goto err; + + dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size); + + return 0; + + err: + free_data(ndd); + return rc; + +} + +static int nd_dimm_remove(struct device *dev) +{ + struct nd_dimm_drvdata *ndd = dev_get_drvdata(dev); + + free_data(ndd); + + return 0; +}