diff options
author | Linus Walleij <linus.walleij@linaro.org> | 2019-05-02 17:30:31 +0300 |
---|---|---|
committer | Richard Weinberger <richard@nod.at> | 2019-05-06 22:48:46 +0300 |
commit | 4aeb1594796d21f10866b7bd28365024fba347ff (patch) | |
tree | 8d804668af899533bd13df3d7ed7f4201112c721 /drivers/mtd/parsers | |
parent | 20700171929316ed88fdd11b3099518a0bd2f36e (diff) | |
download | linux-4aeb1594796d21f10866b7bd28365024fba347ff.tar.xz |
mtd: factor out v1 partition parsing
This breaks out the parsing of v1 partitions so we can later add
a v2 partition parser.
Cc: Ryan Harkin <ryan.harkin@linaro.org>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/parsers')
-rw-r--r-- | drivers/mtd/parsers/afs.c | 88 |
1 files changed, 50 insertions, 38 deletions
diff --git a/drivers/mtd/parsers/afs.c b/drivers/mtd/parsers/afs.c index ccc198818057..32ded91ae66c 100644 --- a/drivers/mtd/parsers/afs.c +++ b/drivers/mtd/parsers/afs.c @@ -181,14 +181,18 @@ afs_read_iis_v1(struct mtd_info *mtd, struct image_info_v1 *iis, u_int ptr) return ret; } -static int parse_afs_partitions(struct mtd_info *mtd, - const struct mtd_partition **pparts, - struct mtd_part_parser_data *data) +static int afs_parse_v1_partition(struct mtd_info *mtd, + u_int off, struct mtd_partition *part) { - struct mtd_partition *parts; - u_int mask, off, sz; - int ret = 0; - int i; + struct image_info_v1 iis; + u_int mask; + /* + * Static checks cannot see that we bail out if we have an error + * reading the footer. + */ + u_int uninitialized_var(iis_ptr); + u_int uninitialized_var(img_ptr); + int ret; /* * This is the address mask; we use this to mask off out of @@ -196,6 +200,39 @@ static int parse_afs_partitions(struct mtd_info *mtd, */ mask = mtd->size - 1; + ret = afs_read_footer_v1(mtd, &img_ptr, &iis_ptr, off, mask); + if (ret < 0) + return ret; + + /* Read the image info block */ + ret = afs_read_iis_v1(mtd, &iis, iis_ptr); + if (ret < 0) + return ret; + + part->name = kstrdup(iis.name, GFP_KERNEL); + if (!part->name) + return -ENOMEM; + + part->size = (iis.length + mtd->erasesize - 1) & ~(mtd->erasesize - 1); + part->offset = img_ptr; + part->mask_flags = 0; + + printk(" mtd: at 0x%08x, %5lluKiB, %8u, %s\n", + img_ptr, part->size / 1024, + iis.imageNumber, part->name); + + return 0; +} + +static int parse_afs_partitions(struct mtd_info *mtd, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + u_int off, sz; + int ret = 0; + int i; + /* Count the partitions by looping over all erase blocks */ for (i = off = sz = 0; off < mtd->size; off += mtd->erasesize) { if (afs_is_v1(mtd, off)) { @@ -215,38 +252,13 @@ static int parse_afs_partitions(struct mtd_info *mtd, * Identify the partitions */ for (i = off = 0; off < mtd->size; off += mtd->erasesize) { - struct image_info_v1 iis; - u_int iis_ptr, img_ptr; - - /* Read the footer. */ - ret = afs_read_footer_v1(mtd, &img_ptr, &iis_ptr, off, mask); - if (ret < 0) - goto out_free_parts; - if (ret == 0) - continue; - - /* Read the image info block */ - ret = afs_read_iis_v1(mtd, &iis, iis_ptr); - if (ret < 0) - goto out_free_parts; - if (ret == 0) - continue; - - parts[i].name = kstrdup(iis.name, GFP_KERNEL); - if (!parts[i].name) { - ret = -ENOMEM; - goto out_free_parts; - } - parts[i].size = (iis.length + mtd->erasesize - 1) & ~(mtd->erasesize - 1); - parts[i].offset = img_ptr; - parts[i].mask_flags = 0; - - printk(" mtd%d: at 0x%08x, %5lluKiB, %8u, %s\n", - i, img_ptr, parts[i].size / 1024, - iis.imageNumber, parts[i].name); - - i += 1; + if (afs_is_v1(mtd, off)) { + ret = afs_parse_v1_partition(mtd, off, &parts[i]); + if (ret) + goto out_free_parts; + i++; + } } *pparts = parts; |