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authorJames <>2015-11-04 11:49:21 +0000
committerJames <>2015-11-04 11:49:21 +0000
commit716ca530e1c4515d8683c9d5be3d56b301758b66 (patch)
tree700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch
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Diffstat (limited to 'target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch')
-rw-r--r--target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch354
1 files changed, 354 insertions, 0 deletions
diff --git a/target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch b/target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch
new file mode 100644
index 0000000..6062259
--- /dev/null
+++ b/target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch
@@ -0,0 +1,354 @@
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -30,11 +30,9 @@
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
+ #include <linux/of.h>
+-#include <linux/magic.h>
+ #include <linux/err.h>
+
+ #include "mtdcore.h"
+-#include "mtdsplit/mtdsplit.h"
+
+ #define MTD_ERASE_PARTIAL 0x8000 /* partition only covers parts of an erase block */
+
+@@ -50,14 +48,13 @@ struct mtd_part {
+ struct list_head list;
+ };
+
+-static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part);
+-
+ /*
+ * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
+ * the pointer to that structure with this macro.
+ */
+ #define PART(x) ((struct mtd_part *)(x))
+
++
+ /*
+ * MTD methods which simply translate the effective address and pass through
+ * to the _real_ device.
+@@ -521,12 +518,14 @@ static struct mtd_part *allocate_partiti
+ if (slave->offset == MTDPART_OFS_APPEND)
+ slave->offset = cur_offset;
+ if (slave->offset == MTDPART_OFS_NXTBLK) {
+- /* Round up to next erasesize */
+- slave->offset = mtd_roundup_to_eb(cur_offset, master);
+- if (slave->offset != cur_offset)
++ slave->offset = cur_offset;
++ if (mtd_mod_by_eb(cur_offset, master) != 0) {
++ /* Round up to next erasesize */
++ slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
+ printk(KERN_NOTICE "Moving partition %d: "
+ "0x%012llx -> 0x%012llx\n", partno,
+ (unsigned long long)cur_offset, (unsigned long long)slave->offset);
++ }
+ }
+ if (slave->offset == MTDPART_OFS_RETAIN) {
+ slave->offset = cur_offset;
+@@ -627,10 +626,8 @@ out_register:
+ return slave;
+ }
+
+-
+-static int
+-__mtd_add_partition(struct mtd_info *master, const char *name,
+- long long offset, long long length, bool dup_check)
++int mtd_add_partition(struct mtd_info *master, const char *name,
++ long long offset, long long length)
+ {
+ struct mtd_partition part;
+ struct mtd_part *p, *new;
+@@ -662,24 +659,21 @@ __mtd_add_partition(struct mtd_info *mas
+ end = offset + length;
+
+ mutex_lock(&mtd_partitions_mutex);
+- if (dup_check) {
+- list_for_each_entry(p, &mtd_partitions, list)
+- if (p->master == master) {
+- if ((start >= p->offset) &&
+- (start < (p->offset + p->mtd.size)))
+- goto err_inv;
+-
+- if ((end >= p->offset) &&
+- (end < (p->offset + p->mtd.size)))
+- goto err_inv;
+- }
+- }
++ list_for_each_entry(p, &mtd_partitions, list)
++ if (p->master == master) {
++ if ((start >= p->offset) &&
++ (start < (p->offset + p->mtd.size)))
++ goto err_inv;
++
++ if ((end >= p->offset) &&
++ (end < (p->offset + p->mtd.size)))
++ goto err_inv;
++ }
+
+ list_add(&new->list, &mtd_partitions);
+ mutex_unlock(&mtd_partitions_mutex);
+
+ add_mtd_device(&new->mtd);
+- mtd_partition_split(master, new);
+
+ return ret;
+ err_inv:
+@@ -689,12 +683,6 @@ err_inv:
+ }
+ EXPORT_SYMBOL_GPL(mtd_add_partition);
+
+-int mtd_add_partition(struct mtd_info *master, const char *name,
+- long long offset, long long length)
+-{
+- return __mtd_add_partition(master, name, offset, length, true);
+-}
+-
+ int mtd_del_partition(struct mtd_info *master, int partno)
+ {
+ struct mtd_part *slave, *next;
+@@ -718,166 +706,6 @@ int mtd_del_partition(struct mtd_info *m
+ }
+ EXPORT_SYMBOL_GPL(mtd_del_partition);
+
+-static int
+-run_parsers_by_type(struct mtd_part *slave, enum mtd_parser_type type)
+-{
+- struct mtd_partition *parts;
+- int nr_parts;
+- int i;
+-
+- nr_parts = parse_mtd_partitions_by_type(&slave->mtd, type, &parts,
+- NULL);
+- if (nr_parts <= 0)
+- return nr_parts;
+-
+- if (WARN_ON(!parts))
+- return 0;
+-
+- for (i = 0; i < nr_parts; i++) {
+- /* adjust partition offsets */
+- parts[i].offset += slave->offset;
+-
+- __mtd_add_partition(slave->master,
+- parts[i].name,
+- parts[i].offset,
+- parts[i].size,
+- false);
+- }
+-
+- kfree(parts);
+-
+- return nr_parts;
+-}
+-
+-static inline unsigned long
+-mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
+-{
+- unsigned long mask = mtd->erasesize - 1;
+-
+- len += offset & mask;
+- len = (len + mask) & ~mask;
+- len -= offset & mask;
+- return len;
+-}
+-
+-static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
+-{
+- size_t squashfs_len;
+- int len, ret;
+-
+- ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
+- if (ret)
+- return ret;
+-
+- len = mtd_pad_erasesize(master, offset, squashfs_len);
+- *split_offset = offset + len;
+-
+- return 0;
+-}
+-
+-static void split_rootfs_data(struct mtd_info *master, struct mtd_part *part)
+-{
+- unsigned int split_offset = 0;
+- unsigned int split_size;
+- int ret;
+-
+- ret = split_squashfs(master, part->offset, &split_offset);
+- if (ret)
+- return;
+-
+- if (split_offset <= 0)
+- return;
+-
+- if (config_enabled(CONFIG_MTD_SPLIT_SQUASHFS_ROOT))
+- pr_err("Dedicated partitioner didn't create \"rootfs_data\" partition, please fill a bug report!\n");
+- else
+- pr_warn("Support for built-in \"rootfs_data\" splitter will be removed, please use CONFIG_MTD_SPLIT_SQUASHFS_ROOT\n");
+-
+- split_size = part->mtd.size - (split_offset - part->offset);
+- printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
+- ROOTFS_SPLIT_NAME, split_offset, split_size);
+-
+- __mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
+- split_size, false);
+-}
+-
+-#define UBOOT_MAGIC 0x27051956
+-
+-static void split_uimage(struct mtd_info *master, struct mtd_part *part)
+-{
+- struct {
+- __be32 magic;
+- __be32 pad[2];
+- __be32 size;
+- } hdr;
+- size_t len;
+-
+- if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
+- return;
+-
+- if (len != sizeof(hdr) || hdr.magic != cpu_to_be32(UBOOT_MAGIC))
+- return;
+-
+- len = be32_to_cpu(hdr.size) + 0x40;
+- len = mtd_pad_erasesize(master, part->offset, len);
+- if (len + master->erasesize > part->mtd.size)
+- return;
+-
+- if (config_enabled(CONFIG_MTD_SPLIT_UIMAGE_FW))
+- pr_err("Dedicated partitioner didn't split firmware partition, please fill a bug report!\n");
+- else
+- pr_warn("Support for built-in firmware splitter will be removed, please use CONFIG_MTD_SPLIT_UIMAGE_FW\n");
+-
+- __mtd_add_partition(master, "rootfs", part->offset + len,
+- part->mtd.size - len, false);
+-}
+-
+-#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
+-#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
+-#else
+-#define SPLIT_FIRMWARE_NAME "unused"
+-#endif
+-
+-static void split_firmware(struct mtd_info *master, struct mtd_part *part)
+-{
+- int ret;
+-
+- ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
+- if (ret > 0)
+- return;
+-
+- if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
+- split_uimage(master, part);
+-}
+-
+-void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
+- int offset, int size)
+-{
+-}
+-
+-static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
+-{
+- static int rootfs_found = 0;
+-
+- if (rootfs_found)
+- return;
+-
+- if (!strcmp(part->mtd.name, "rootfs")) {
+- int num = run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
+-
+- if (num <= 0 && config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
+- split_rootfs_data(master, part);
+-
+- rootfs_found = 1;
+- }
+-
+- if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
+- config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
+- split_firmware(master, part);
+-
+- arch_split_mtd_part(master, part->mtd.name, part->offset,
+- part->mtd.size);
+-}
+ /*
+ * This function, given a master MTD object and a partition table, creates
+ * and registers slave MTD objects which are bound to the master according to
+@@ -907,7 +735,6 @@ int add_mtd_partitions(struct mtd_info *
+ mutex_unlock(&mtd_partitions_mutex);
+
+ add_mtd_device(&slave->mtd);
+- mtd_partition_split(master, slave);
+
+ cur_offset = slave->offset + slave->mtd.size;
+ }
+@@ -937,30 +764,6 @@ static struct mtd_part_parser *get_parti
+
+ #define put_partition_parser(p) do { module_put((p)->owner); } while (0)
+
+-static struct mtd_part_parser *
+-get_partition_parser_by_type(enum mtd_parser_type type,
+- struct mtd_part_parser *start)
+-{
+- struct mtd_part_parser *p, *ret = NULL;
+-
+- spin_lock(&part_parser_lock);
+-
+- p = list_prepare_entry(start, &part_parsers, list);
+- if (start)
+- put_partition_parser(start);
+-
+- list_for_each_entry_continue(p, &part_parsers, list) {
+- if (p->type == type && try_module_get(p->owner)) {
+- ret = p;
+- break;
+- }
+- }
+-
+- spin_unlock(&part_parser_lock);
+-
+- return ret;
+-}
+-
+ void register_mtd_parser(struct mtd_part_parser *p)
+ {
+ spin_lock(&part_parser_lock);
+@@ -1076,38 +879,6 @@ int parse_mtd_partitions(struct mtd_info
+ return ret;
+ }
+
+-int parse_mtd_partitions_by_type(struct mtd_info *master,
+- enum mtd_parser_type type,
+- struct mtd_partition **pparts,
+- struct mtd_part_parser_data *data)
+-{
+- struct mtd_part_parser *prev = NULL;
+- int ret = 0;
+-
+- while (1) {
+- struct mtd_part_parser *parser;
+-
+- parser = get_partition_parser_by_type(type, prev);
+- if (!parser)
+- break;
+-
+- ret = (*parser->parse_fn)(master, pparts, data);
+-
+- if (ret > 0) {
+- put_partition_parser(parser);
+- printk(KERN_NOTICE
+- "%d %s partitions found on MTD device %s\n",
+- ret, parser->name, master->name);
+- break;
+- }
+-
+- prev = parser;
+- }
+-
+- return ret;
+-}
+-EXPORT_SYMBOL_GPL(parse_mtd_partitions_by_type);
+-
+ int mtd_is_partition(const struct mtd_info *mtd)
+ {
+ struct mtd_part *part;