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Date: Wed, 21 Sep 2016 11:56:18 +0200
From: Daniel Walter <dwalter@...ma-star.at>
To: linux-mtd@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, computersforpeace@...il.com,
dwmw2@...radead.org, boris.brezillon@...e-electrons.com,
Richard Weinberger <richard@....at>
Subject: [PATCH v2 39/46] mtd: nandsim: Rework init error paths
From: Richard Weinberger <richard@....at>
Signed-off-by: Richard Weinberger <richard@....at>
---
drivers/mtd/nand/nandsim.c | 97 +++++++++++++++++++++++++++-------------------
1 file changed, 57 insertions(+), 40 deletions(-)
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index 6b7570b..92f5efc 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -871,12 +871,14 @@ static int init_nandsim(struct mtd_info *mtd, struct nandsim_params *nsparam)
if (!part_sz || part_sz > remains) {
pr_err("bad partition size.\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_names;
}
ns->partitions[i].name = get_partition_name(ns, i);
if (!ns->partitions[i].name) {
pr_err("unable to allocate memory.\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto err_names;
}
ns->partitions[i].offset = next_offset;
ns->partitions[i].size = part_sz;
@@ -887,12 +889,14 @@ static int init_nandsim(struct mtd_info *mtd, struct nandsim_params *nsparam)
if (remains) {
if (nsparam->parts_num + 1 > ARRAY_SIZE(ns->partitions)) {
pr_err("too many partitions.\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_names;
}
ns->partitions[i].name = get_partition_name(ns, i);
if (!ns->partitions[i].name) {
pr_err("unable to allocate memory.\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto err_names;
}
ns->partitions[i].offset = next_offset;
ns->partitions[i].size = remains;
@@ -921,22 +925,24 @@ static int init_nandsim(struct mtd_info *mtd, struct nandsim_params *nsparam)
ns->bops = nsparam->bops;
- pr_info("Using backend: %s\n", ns->bops->name);
- if ((ret = ns->bops->init(ns, nsparam)) != 0) {
- pr_err("Unable to initialize simulator backend: %i\n", ret);
- return ret;
- }
-
/* Allocate / initialize the internal buffer */
ns->buf.byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL);
if (!ns->buf.byte) {
pr_err("unable to allocate %u bytes for the internal buffer\n",
ns->geom.pgszoob);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto err_buf;
}
memset(ns->buf.byte, 0xFF, ns->geom.pgszoob);
return 0;
+
+err_buf:
+ kfree(ns->buf.byte);
+err_names:
+ for (i = 0; i < ARRAY_SIZE(ns->partitions); i++)
+ kfree(ns->partitions[i].name);
+ return ret;
}
/*
@@ -944,8 +950,11 @@ static int init_nandsim(struct mtd_info *mtd, struct nandsim_params *nsparam)
*/
static void free_nandsim(struct nandsim *ns)
{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ns->partitions); i++)
+ kfree(ns->partitions[i].name);
kfree(ns->buf.byte);
- ns->bops->destroy(ns);
}
static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd,
@@ -2751,7 +2760,7 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
pr_err("Cannot allocate more than %i instances!\n", NANDSIM_MAX_DEVICES);
retval = -ENFILE;
mutex_unlock(&ns_mtd_mutex);
- goto error;
+ goto err_chip;
}
nsmtd = ns_mtds[i] = nand_to_mtd(chip);
@@ -2789,7 +2798,7 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
default:
pr_err("bbt has to be 0..2\n");
retval = -EINVAL;
- goto error;
+ goto err_mtds;
}
/*
* Perform minimum nandsim structure initialization to handle
@@ -2817,13 +2826,13 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
nsmtd->_put_device = ns_put_device;
if ((retval = parse_weakblocks(nand, nsparam->weakblocks)) != 0)
- goto error;
+ goto err_lists;
if ((retval = parse_weakpages(nand, nsparam->weakpages)) != 0)
- goto error;
+ goto err_lists;
if ((retval = parse_gravepages(nand, nsparam->gravepages)) != 0)
- goto error;
+ goto err_lists;
nand->do_delays = nsparam->do_delays;
nand->access_delay = nsparam->access_delay;
@@ -2838,14 +2847,14 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
pr_err("cannot scan NAND Simulator device\n");
if (retval > 0)
retval = -ENXIO;
- goto error;
+ goto err_lists;
}
if (nsparam->no_oob) {
if (nsparam->bch) {
pr_err("Cannot use ECC without OOB\n");
retval = -EINVAL;
- goto error;
+ goto err_lists;
}
chip->ecc.mode = NAND_ECC_NONE;
@@ -2855,7 +2864,7 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
if (!mtd_nand_has_bch()) {
pr_err("BCH ECC support is disabled\n");
retval = -EINVAL;
- goto error;
+ goto err_lists;
}
/* use 512-byte ecc blocks */
eccsteps = nsmtd->writesize/512;
@@ -2864,12 +2873,12 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
if ((nsmtd->oobsize < 64) || !eccsteps) {
pr_err("bch not available on small page devices\n");
retval = -EINVAL;
- goto error;
+ goto err_lists;
}
if ((eccbytes*eccsteps+2) > nsmtd->oobsize) {
pr_err("invalid bch value %u\n", nsparam->bch);
retval = -EINVAL;
- goto error;
+ goto err_lists;
}
chip->ecc.mode = NAND_ECC_SOFT;
chip->ecc.algo = NAND_ECC_BCH;
@@ -2887,7 +2896,7 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
pr_err("can't register NAND Simulator\n");
if (retval > 0)
retval = -ENXIO;
- goto error;
+ goto err_lists;
}
if (nsparam->overridesize) {
@@ -2895,7 +2904,7 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
if (new_size >> nsparam->overridesize != nsmtd->erasesize) {
pr_err("overridesize is too big\n");
retval = -EINVAL;
- goto err_exit;
+ goto err_nand;
}
/* N.B. This relies on nand_scan not doing anything with the size before we change it */
nsmtd->size = new_size;
@@ -2905,35 +2914,45 @@ struct mtd_info *ns_new_instance(struct nandsim_params *nsparam)
}
if ((retval = setup_wear_reporting(nsmtd)) != 0)
- goto err_exit;
+ goto err_nand;
if ((retval = nandsim_debugfs_create(nand)) != 0)
- goto err_exit;
+ goto err_nand;
if ((retval = init_nandsim(nsmtd, nsparam)) != 0)
- goto err_exit;
+ goto err_debugfs;
+
+ pr_info("Using backend: %s\n", nand->bops->name);
+ if ((retval = nand->bops->init(nand, nsparam)) != 0) {
+ pr_err("Unable to initialize simulator backend: %i\n", retval);
+ goto err_nandsim;
+ }
if ((retval = chip->scan_bbt(nsmtd)) != 0)
- goto err_exit;
+ goto err_nandsim;
if ((retval = parse_badblocks(nand, nsmtd, nsparam->badblocks)) != 0)
- goto err_exit;
+ goto err_nandsim;
/* Register NAND partitions */
retval = mtd_device_register(nsmtd, &nand->partitions[0],
nand->nbparts);
if (retval != 0)
- goto err_exit;
+ goto err_nandsim;
return nsmtd;
-err_exit:
+err_nandsim:
free_nandsim(nand);
+err_debugfs:
+ nandsim_debugfs_remove(nand);
+err_nand:
nand_release(nsmtd);
- for (i = 0;i < ARRAY_SIZE(nand->partitions); ++i)
- kfree(nand->partitions[i].name);
-error:
+err_lists:
free_lists(nand);
+err_mtds:
+ ns_mtds[nand->index] = NULL;
+err_chip:
kfree(chip);
return ERR_PTR(retval);
@@ -2942,7 +2961,7 @@ EXPORT_SYMBOL_GPL(ns_new_instance);
int ns_destroy_instance(struct mtd_info *nsmtd)
{
- int i, ret;
+ int ret;
struct nand_chip *chip = mtd_to_nand(nsmtd);
struct nandsim *ns = nand_get_controller_data(chip);
@@ -2952,12 +2971,10 @@ int ns_destroy_instance(struct mtd_info *nsmtd)
nand_cleanup(nsmtd);
nandsim_debugfs_remove(ns);
+ ns->bops->destroy(ns);
+ free_nandsim(ns);
free_lists(ns);
- free_nandsim(ns); /* Free nandsim private resources */
- nand_release(nsmtd); /* Unregister driver */
- for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i)
- kfree(ns->partitions[i].name);
- kfree(mtd_to_nand(nsmtd)); /* Free other structures */
+ kfree(chip);
return 0;
}
--
2.8.3
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