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mtd: get rid of the mtd_add_device_partitions() 

This simplifies code a bit by:
1) Avoiding an extra (tiny) function
2) Checking for amount of parsed (found) partitions just once
3) Avoiding clearing/filling struct mtd_partitions manually

With this commit proper functions are called directly from the
mtd_device_parse_register(). It doesn't need to use minor tricks like
memsetting struct to 0 to trigger an expected
mtd_add_device_partitions() behavior.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Rafał Miłecki 2018-01-16 16:45:42 +01:00 committed by Boris Brezillon
parent 2c77c57d22
commit 0dbe4ea78d
1 changed files with 12 additions and 31 deletions
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43
drivers/mtd/mtdcore.c
View File

@ -641,21 +641,6 @@ int del_mtd_device(struct mtd_info *mtd)
return ret;
}
static int mtd_add_device_partitions(struct mtd_info *mtd,
struct mtd_partitions *parts)
{
const struct mtd_partition *real_parts = parts->parts;
int nbparts = parts->nr_parts;
if (!nbparts && !device_is_registered(&mtd->dev))
return add_mtd_device(mtd);
if (nbparts > 0)
return add_mtd_partitions(mtd, real_parts, nbparts);
return 0;
}
/*
* Set a few defaults based on the parent devices, if not provided by the
* driver
@ -706,7 +691,7 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types,
const struct mtd_partition *parts,
int nr_parts)
{
struct mtd_partitions parsed;
struct mtd_partitions parsed = { };
int ret;
mtd_set_dev_defaults(mtd);
@ -717,24 +702,20 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types,
return ret;
}
memset(&parsed, 0, sizeof(parsed));
/* Prefer parsed partitions over driver-provided fallback */
ret = parse_mtd_partitions(mtd, types, &parsed, parser_data);
if ((ret < 0 || parsed.nr_parts == 0) && parts && nr_parts) {
/* Fall back to driver-provided partitions */
parsed = (struct mtd_partitions){
.parts = parts,
.nr_parts = nr_parts,
};
} else if (ret < 0) {
/* Didn't come up with parsed OR fallback partitions */
pr_info("mtd: failed to find partitions; one or more parsers reports errors (%d)\n",
ret);
/* Don't abort on errors; we can still use unpartitioned MTD */
memset(&parsed, 0, sizeof(parsed));
if (!ret && parsed.nr_parts) {
parts = parsed.parts;
nr_parts = parsed.nr_parts;
}
ret = mtd_add_device_partitions(mtd, &parsed);
if (nr_parts)
ret = add_mtd_partitions(mtd, parts, nr_parts);
else if (!device_is_registered(&mtd->dev))
ret = add_mtd_device(mtd);
else
ret = 0;
if (ret)
goto out;