From c3168d26c8deea4cc0202bb19341ab55247c3941 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Fri, 4 Dec 2015 15:25:13 -0800 Subject: [PATCH] mtd: ofpart: assign return argument exactly once It's easier to refactor these parsers if the return value gets assigned only once, just like every other MTD partition parser. This prepares for making the second arg to the parse_fn() const. This is OK if we construct the partitions completely first, and assign them to the return pointer only after we're done modifying them. Signed-off-by: Brian Norris Reviewed-by: Boris Brezillon --- drivers/mtd/ofpart.c | 35 +++++++++++++++++++---------------- 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c index 904645143397..c7df2f1dd6b8 100644 --- a/drivers/mtd/ofpart.c +++ b/drivers/mtd/ofpart.c @@ -29,6 +29,7 @@ static int parse_ofpart_partitions(struct mtd_info *master, struct mtd_partition **pparts, struct mtd_part_parser_data *data) { + struct mtd_partition *parts; struct device_node *mtd_node; struct device_node *ofpart_node; const char *partname; @@ -70,8 +71,8 @@ static int parse_ofpart_partitions(struct mtd_info *master, if (nr_parts == 0) return 0; - *pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL); - if (!*pparts) + parts = kzalloc(nr_parts * sizeof(*parts), GFP_KERNEL); + if (!parts) return -ENOMEM; i = 0; @@ -105,19 +106,19 @@ static int parse_ofpart_partitions(struct mtd_info *master, goto ofpart_fail; } - (*pparts)[i].offset = of_read_number(reg, a_cells); - (*pparts)[i].size = of_read_number(reg + a_cells, s_cells); + parts[i].offset = of_read_number(reg, a_cells); + parts[i].size = of_read_number(reg + a_cells, s_cells); partname = of_get_property(pp, "label", &len); if (!partname) partname = of_get_property(pp, "name", &len); - (*pparts)[i].name = partname; + parts[i].name = partname; if (of_get_property(pp, "read-only", &len)) - (*pparts)[i].mask_flags |= MTD_WRITEABLE; + parts[i].mask_flags |= MTD_WRITEABLE; if (of_get_property(pp, "lock", &len)) - (*pparts)[i].mask_flags |= MTD_POWERUP_LOCK; + parts[i].mask_flags |= MTD_POWERUP_LOCK; i++; } @@ -125,6 +126,7 @@ static int parse_ofpart_partitions(struct mtd_info *master, if (!nr_parts) goto ofpart_none; + *pparts = parts; return nr_parts; ofpart_fail: @@ -133,8 +135,7 @@ ofpart_fail: ret = -EINVAL; ofpart_none: of_node_put(pp); - kfree(*pparts); - *pparts = NULL; + kfree(parts); return ret; } @@ -147,6 +148,7 @@ static int parse_ofoldpart_partitions(struct mtd_info *master, struct mtd_partition **pparts, struct mtd_part_parser_data *data) { + struct mtd_partition *parts; struct device_node *dp; int i, plen, nr_parts; const struct { @@ -168,32 +170,33 @@ static int parse_ofoldpart_partitions(struct mtd_info *master, nr_parts = plen / sizeof(part[0]); - *pparts = kzalloc(nr_parts * sizeof(*(*pparts)), GFP_KERNEL); - if (!*pparts) + parts = kzalloc(nr_parts * sizeof(*parts), GFP_KERNEL); + if (!parts) return -ENOMEM; names = of_get_property(dp, "partition-names", &plen); for (i = 0; i < nr_parts; i++) { - (*pparts)[i].offset = be32_to_cpu(part->offset); - (*pparts)[i].size = be32_to_cpu(part->len) & ~1; + parts[i].offset = be32_to_cpu(part->offset); + parts[i].size = be32_to_cpu(part->len) & ~1; /* bit 0 set signifies read only partition */ if (be32_to_cpu(part->len) & 1) - (*pparts)[i].mask_flags = MTD_WRITEABLE; + parts[i].mask_flags = MTD_WRITEABLE; if (names && (plen > 0)) { int len = strlen(names) + 1; - (*pparts)[i].name = names; + parts[i].name = names; plen -= len; names += len; } else { - (*pparts)[i].name = "unnamed"; + parts[i].name = "unnamed"; } part++; } + *pparts = parts; return nr_parts; }