diff options
Diffstat (limited to 'target/linux/patches/2.6.39.4/mtd-rootfs.patch')
| -rw-r--r-- | target/linux/patches/2.6.39.4/mtd-rootfs.patch | 786 |
1 files changed, 0 insertions, 786 deletions
diff --git a/target/linux/patches/2.6.39.4/mtd-rootfs.patch b/target/linux/patches/2.6.39.4/mtd-rootfs.patch deleted file mode 100644 index 35c07c186..000000000 --- a/target/linux/patches/2.6.39.4/mtd-rootfs.patch +++ /dev/null @@ -1,786 +0,0 @@ -diff -Nur linux-2.6.39.4.orig/drivers/mtd/mtdpart.c linux-2.6.39.4/drivers/mtd/mtdpart.c ---- linux-2.6.39.4.orig/drivers/mtd/mtdpart.c 2011-08-03 21:43:28.000000000 +0200 -+++ linux-2.6.39.4/drivers/mtd/mtdpart.c 2012-01-17 19:15:04.000000000 +0100 -@@ -30,6 +30,7 @@ - #include <linux/mtd/mtd.h> - #include <linux/mtd/partitions.h> - #include <linux/err.h> -+#include <linux/root_dev.h> - - /* Our partition linked list */ - static LIST_HEAD(mtd_partitions); -@@ -660,6 +661,14 @@ - if (IS_ERR(slave)) - return PTR_ERR(slave); - -+ if (strcmp(parts[i].name, "rootfs") == 0) { -+ if (ROOT_DEV == 0) { -+ printk(KERN_NOTICE "mtd: partition \"rootfs\" " -+ "set to be root filesystem\n"); -+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, i); -+ } -+ } -+ - mutex_lock(&mtd_partitions_mutex); - list_add(&slave->list, &mtd_partitions); - mutex_unlock(&mtd_partitions_mutex); -diff -Nur linux-2.6.39.4.orig/drivers/mtd/mtdpart.c.orig linux-2.6.39.4/drivers/mtd/mtdpart.c.orig ---- linux-2.6.39.4.orig/drivers/mtd/mtdpart.c.orig 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.39.4/drivers/mtd/mtdpart.c.orig 2011-08-03 21:43:28.000000000 +0200 -@@ -0,0 +1,756 @@ -+/* -+ * Simple MTD partitioning layer -+ * -+ * Copyright © 2000 Nicolas Pitre <nico@fluxnic.net> -+ * Copyright © 2002 Thomas Gleixner <gleixner@linutronix.de> -+ * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ * -+ */ -+ -+#include <linux/module.h> -+#include <linux/types.h> -+#include <linux/kernel.h> -+#include <linux/slab.h> -+#include <linux/list.h> -+#include <linux/kmod.h> -+#include <linux/mtd/mtd.h> -+#include <linux/mtd/partitions.h> -+#include <linux/err.h> -+ -+/* Our partition linked list */ -+static LIST_HEAD(mtd_partitions); -+static DEFINE_MUTEX(mtd_partitions_mutex); -+ -+/* Our partition node structure */ -+struct mtd_part { -+ struct mtd_info mtd; -+ struct mtd_info *master; -+ uint64_t offset; -+ struct list_head list; -+}; -+ -+/* -+ * 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. -+ */ -+ -+static int part_read(struct mtd_info *mtd, loff_t from, size_t len, -+ size_t *retlen, u_char *buf) -+{ -+ struct mtd_part *part = PART(mtd); -+ struct mtd_ecc_stats stats; -+ int res; -+ -+ stats = part->master->ecc_stats; -+ -+ if (from >= mtd->size) -+ len = 0; -+ else if (from + len > mtd->size) -+ len = mtd->size - from; -+ res = part->master->read(part->master, from + part->offset, -+ len, retlen, buf); -+ if (unlikely(res)) { -+ if (res == -EUCLEAN) -+ mtd->ecc_stats.corrected += part->master->ecc_stats.corrected - stats.corrected; -+ if (res == -EBADMSG) -+ mtd->ecc_stats.failed += part->master->ecc_stats.failed - stats.failed; -+ } -+ return res; -+} -+ -+static int part_point(struct mtd_info *mtd, loff_t from, size_t len, -+ size_t *retlen, void **virt, resource_size_t *phys) -+{ -+ struct mtd_part *part = PART(mtd); -+ if (from >= mtd->size) -+ len = 0; -+ else if (from + len > mtd->size) -+ len = mtd->size - from; -+ return part->master->point (part->master, from + part->offset, -+ len, retlen, virt, phys); -+} -+ -+static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ -+ part->master->unpoint(part->master, from + part->offset, len); -+} -+ -+static unsigned long part_get_unmapped_area(struct mtd_info *mtd, -+ unsigned long len, -+ unsigned long offset, -+ unsigned long flags) -+{ -+ struct mtd_part *part = PART(mtd); -+ -+ offset += part->offset; -+ return part->master->get_unmapped_area(part->master, len, offset, -+ flags); -+} -+ -+static int part_read_oob(struct mtd_info *mtd, loff_t from, -+ struct mtd_oob_ops *ops) -+{ -+ struct mtd_part *part = PART(mtd); -+ int res; -+ -+ if (from >= mtd->size) -+ return -EINVAL; -+ if (ops->datbuf && from + ops->len > mtd->size) -+ return -EINVAL; -+ -+ /* -+ * If OOB is also requested, make sure that we do not read past the end -+ * of this partition. -+ */ -+ if (ops->oobbuf) { -+ size_t len, pages; -+ -+ if (ops->mode == MTD_OOB_AUTO) -+ len = mtd->oobavail; -+ else -+ len = mtd->oobsize; -+ pages = mtd_div_by_ws(mtd->size, mtd); -+ pages -= mtd_div_by_ws(from, mtd); -+ if (ops->ooboffs + ops->ooblen > pages * len) -+ return -EINVAL; -+ } -+ -+ res = part->master->read_oob(part->master, from + part->offset, ops); -+ if (unlikely(res)) { -+ if (res == -EUCLEAN) -+ mtd->ecc_stats.corrected++; -+ if (res == -EBADMSG) -+ mtd->ecc_stats.failed++; -+ } -+ return res; -+} -+ -+static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from, -+ size_t len, size_t *retlen, u_char *buf) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->read_user_prot_reg(part->master, from, -+ len, retlen, buf); -+} -+ -+static int part_get_user_prot_info(struct mtd_info *mtd, -+ struct otp_info *buf, size_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->get_user_prot_info(part->master, buf, len); -+} -+ -+static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, -+ size_t len, size_t *retlen, u_char *buf) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->read_fact_prot_reg(part->master, from, -+ len, retlen, buf); -+} -+ -+static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf, -+ size_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->get_fact_prot_info(part->master, buf, len); -+} -+ -+static int part_write(struct mtd_info *mtd, loff_t to, size_t len, -+ size_t *retlen, const u_char *buf) -+{ -+ struct mtd_part *part = PART(mtd); -+ if (!(mtd->flags & MTD_WRITEABLE)) -+ return -EROFS; -+ if (to >= mtd->size) -+ len = 0; -+ else if (to + len > mtd->size) -+ len = mtd->size - to; -+ return part->master->write(part->master, to + part->offset, -+ len, retlen, buf); -+} -+ -+static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len, -+ size_t *retlen, const u_char *buf) -+{ -+ struct mtd_part *part = PART(mtd); -+ if (!(mtd->flags & MTD_WRITEABLE)) -+ return -EROFS; -+ if (to >= mtd->size) -+ len = 0; -+ else if (to + len > mtd->size) -+ len = mtd->size - to; -+ return part->master->panic_write(part->master, to + part->offset, -+ len, retlen, buf); -+} -+ -+static int part_write_oob(struct mtd_info *mtd, loff_t to, -+ struct mtd_oob_ops *ops) -+{ -+ struct mtd_part *part = PART(mtd); -+ -+ if (!(mtd->flags & MTD_WRITEABLE)) -+ return -EROFS; -+ -+ if (to >= mtd->size) -+ return -EINVAL; -+ if (ops->datbuf && to + ops->len > mtd->size) -+ return -EINVAL; -+ return part->master->write_oob(part->master, to + part->offset, ops); -+} -+ -+static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from, -+ size_t len, size_t *retlen, u_char *buf) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->write_user_prot_reg(part->master, from, -+ len, retlen, buf); -+} -+ -+static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, -+ size_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->lock_user_prot_reg(part->master, from, len); -+} -+ -+static int part_writev(struct mtd_info *mtd, const struct kvec *vecs, -+ unsigned long count, loff_t to, size_t *retlen) -+{ -+ struct mtd_part *part = PART(mtd); -+ if (!(mtd->flags & MTD_WRITEABLE)) -+ return -EROFS; -+ return part->master->writev(part->master, vecs, count, -+ to + part->offset, retlen); -+} -+ -+static int part_erase(struct mtd_info *mtd, struct erase_info *instr) -+{ -+ struct mtd_part *part = PART(mtd); -+ int ret; -+ if (!(mtd->flags & MTD_WRITEABLE)) -+ return -EROFS; -+ if (instr->addr >= mtd->size) -+ return -EINVAL; -+ instr->addr += part->offset; -+ ret = part->master->erase(part->master, instr); -+ if (ret) { -+ if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) -+ instr->fail_addr -= part->offset; -+ instr->addr -= part->offset; -+ } -+ return ret; -+} -+ -+void mtd_erase_callback(struct erase_info *instr) -+{ -+ if (instr->mtd->erase == part_erase) { -+ struct mtd_part *part = PART(instr->mtd); -+ -+ if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) -+ instr->fail_addr -= part->offset; -+ instr->addr -= part->offset; -+ } -+ if (instr->callback) -+ instr->callback(instr); -+} -+EXPORT_SYMBOL_GPL(mtd_erase_callback); -+ -+static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ if ((len + ofs) > mtd->size) -+ return -EINVAL; -+ return part->master->lock(part->master, ofs + part->offset, len); -+} -+ -+static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ if ((len + ofs) > mtd->size) -+ return -EINVAL; -+ return part->master->unlock(part->master, ofs + part->offset, len); -+} -+ -+static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) -+{ -+ struct mtd_part *part = PART(mtd); -+ if ((len + ofs) > mtd->size) -+ return -EINVAL; -+ return part->master->is_locked(part->master, ofs + part->offset, len); -+} -+ -+static void part_sync(struct mtd_info *mtd) -+{ -+ struct mtd_part *part = PART(mtd); -+ part->master->sync(part->master); -+} -+ -+static int part_suspend(struct mtd_info *mtd) -+{ -+ struct mtd_part *part = PART(mtd); -+ return part->master->suspend(part->master); -+} -+ -+static void part_resume(struct mtd_info *mtd) -+{ -+ struct mtd_part *part = PART(mtd); -+ part->master->resume(part->master); -+} -+ -+static int part_block_isbad(struct mtd_info *mtd, loff_t ofs) -+{ -+ struct mtd_part *part = PART(mtd); -+ if (ofs >= mtd->size) -+ return -EINVAL; -+ ofs += part->offset; -+ return part->master->block_isbad(part->master, ofs); -+} -+ -+static int part_block_markbad(struct mtd_info *mtd, loff_t ofs) -+{ -+ struct mtd_part *part = PART(mtd); -+ int res; -+ -+ if (!(mtd->flags & MTD_WRITEABLE)) -+ return -EROFS; -+ if (ofs >= mtd->size) -+ return -EINVAL; -+ ofs += part->offset; -+ res = part->master->block_markbad(part->master, ofs); -+ if (!res) -+ mtd->ecc_stats.badblocks++; -+ return res; -+} -+ -+static inline void free_partition(struct mtd_part *p) -+{ -+ kfree(p->mtd.name); -+ kfree(p); -+} -+ -+/* -+ * This function unregisters and destroy all slave MTD objects which are -+ * attached to the given master MTD object. -+ */ -+ -+int del_mtd_partitions(struct mtd_info *master) -+{ -+ struct mtd_part *slave, *next; -+ int ret, err = 0; -+ -+ mutex_lock(&mtd_partitions_mutex); -+ list_for_each_entry_safe(slave, next, &mtd_partitions, list) -+ if (slave->master == master) { -+ ret = del_mtd_device(&slave->mtd); -+ if (ret < 0) { -+ err = ret; -+ continue; -+ } -+ list_del(&slave->list); -+ free_partition(slave); -+ } -+ mutex_unlock(&mtd_partitions_mutex); -+ -+ return err; -+} -+EXPORT_SYMBOL(del_mtd_partitions); -+ -+static struct mtd_part *allocate_partition(struct mtd_info *master, -+ const struct mtd_partition *part, int partno, -+ uint64_t cur_offset) -+{ -+ struct mtd_part *slave; -+ char *name; -+ -+ /* allocate the partition structure */ -+ slave = kzalloc(sizeof(*slave), GFP_KERNEL); -+ name = kstrdup(part->name, GFP_KERNEL); -+ if (!name || !slave) { -+ printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n", -+ master->name); -+ kfree(name); -+ kfree(slave); -+ return ERR_PTR(-ENOMEM); -+ } -+ -+ /* set up the MTD object for this partition */ -+ slave->mtd.type = master->type; -+ slave->mtd.flags = master->flags & ~part->mask_flags; -+ slave->mtd.size = part->size; -+ slave->mtd.writesize = master->writesize; -+ slave->mtd.writebufsize = master->writebufsize; -+ slave->mtd.oobsize = master->oobsize; -+ slave->mtd.oobavail = master->oobavail; -+ slave->mtd.subpage_sft = master->subpage_sft; -+ -+ slave->mtd.name = name; -+ slave->mtd.owner = master->owner; -+ slave->mtd.backing_dev_info = master->backing_dev_info; -+ -+ /* NOTE: we don't arrange MTDs as a tree; it'd be error-prone -+ * to have the same data be in two different partitions. -+ */ -+ slave->mtd.dev.parent = master->dev.parent; -+ -+ slave->mtd.read = part_read; -+ slave->mtd.write = part_write; -+ -+ if (master->panic_write) -+ slave->mtd.panic_write = part_panic_write; -+ -+ if (master->point && master->unpoint) { -+ slave->mtd.point = part_point; -+ slave->mtd.unpoint = part_unpoint; -+ } -+ -+ if (master->get_unmapped_area) -+ slave->mtd.get_unmapped_area = part_get_unmapped_area; -+ if (master->read_oob) -+ slave->mtd.read_oob = part_read_oob; -+ if (master->write_oob) -+ slave->mtd.write_oob = part_write_oob; -+ if (master->read_user_prot_reg) -+ slave->mtd.read_user_prot_reg = part_read_user_prot_reg; -+ if (master->read_fact_prot_reg) -+ slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg; -+ if (master->write_user_prot_reg) -+ slave->mtd.write_user_prot_reg = part_write_user_prot_reg; -+ if (master->lock_user_prot_reg) -+ slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg; -+ if (master->get_user_prot_info) -+ slave->mtd.get_user_prot_info = part_get_user_prot_info; -+ if (master->get_fact_prot_info) -+ slave->mtd.get_fact_prot_info = part_get_fact_prot_info; -+ if (master->sync) -+ slave->mtd.sync = part_sync; -+ if (!partno && !master->dev.class && master->suspend && master->resume) { -+ slave->mtd.suspend = part_suspend; -+ slave->mtd.resume = part_resume; -+ } -+ if (master->writev) -+ slave->mtd.writev = part_writev; -+ if (master->lock) -+ slave->mtd.lock = part_lock; -+ if (master->unlock) -+ slave->mtd.unlock = part_unlock; -+ if (master->is_locked) -+ slave->mtd.is_locked = part_is_locked; -+ if (master->block_isbad) -+ slave->mtd.block_isbad = part_block_isbad; -+ if (master->block_markbad) -+ slave->mtd.block_markbad = part_block_markbad; -+ slave->mtd.erase = part_erase; -+ slave->master = master; -+ slave->offset = part->offset; -+ -+ if (slave->offset == MTDPART_OFS_APPEND) -+ slave->offset = cur_offset; -+ if (slave->offset == MTDPART_OFS_NXTBLK) { -+ 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->mtd.size == MTDPART_SIZ_FULL) -+ slave->mtd.size = master->size - slave->offset; -+ -+ printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset, -+ (unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name); -+ -+ /* let's do some sanity checks */ -+ if (slave->offset >= master->size) { -+ /* let's register it anyway to preserve ordering */ -+ slave->offset = 0; -+ slave->mtd.size = 0; -+ printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n", -+ part->name); -+ goto out_register; -+ } -+ if (slave->offset + slave->mtd.size > master->size) { -+ slave->mtd.size = master->size - slave->offset; -+ printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n", -+ part->name, master->name, (unsigned long long)slave->mtd.size); -+ } -+ if (master->numeraseregions > 1) { -+ /* Deal with variable erase size stuff */ -+ int i, max = master->numeraseregions; -+ u64 end = slave->offset + slave->mtd.size; -+ struct mtd_erase_region_info *regions = master->eraseregions; -+ -+ /* Find the first erase regions which is part of this -+ * partition. */ -+ for (i = 0; i < max && regions[i].offset <= slave->offset; i++) -+ ; -+ /* The loop searched for the region _behind_ the first one */ -+ if (i > 0) -+ i--; -+ -+ /* Pick biggest erasesize */ -+ for (; i < max && regions[i].offset < end; i++) { -+ if (slave->mtd.erasesize < regions[i].erasesize) { -+ slave->mtd.erasesize = regions[i].erasesize; -+ } -+ } -+ BUG_ON(slave->mtd.erasesize == 0); -+ } else { -+ /* Single erase size */ -+ slave->mtd.erasesize = master->erasesize; -+ } -+ -+ if ((slave->mtd.flags & MTD_WRITEABLE) && -+ mtd_mod_by_eb(slave->offset, &slave->mtd)) { -+ /* Doesn't start on a boundary of major erase size */ -+ /* FIXME: Let it be writable if it is on a boundary of -+ * _minor_ erase size though */ -+ slave->mtd.flags &= ~MTD_WRITEABLE; -+ printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n", -+ part->name); -+ } -+ if ((slave->mtd.flags & MTD_WRITEABLE) && -+ mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) { -+ slave->mtd.flags &= ~MTD_WRITEABLE; -+ printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n", -+ part->name); -+ } -+ -+ slave->mtd.ecclayout = master->ecclayout; -+ if (master->block_isbad) { -+ uint64_t offs = 0; -+ -+ while (offs < slave->mtd.size) { -+ if (master->block_isbad(master, -+ offs + slave->offset)) -+ slave->mtd.ecc_stats.badblocks++; -+ offs += slave->mtd.erasesize; -+ } -+ } -+ -+out_register: -+ return slave; -+} -+ -+int mtd_add_partition(struct mtd_info *master, char *name, -+ long long offset, long long length) -+{ -+ struct mtd_partition part; -+ struct mtd_part *p, *new; -+ uint64_t start, end; -+ int ret = 0; -+ -+ /* the direct offset is expected */ -+ if (offset == MTDPART_OFS_APPEND || -+ offset == MTDPART_OFS_NXTBLK) -+ return -EINVAL; -+ -+ if (length == MTDPART_SIZ_FULL) -+ length = master->size - offset; -+ -+ if (length <= 0) -+ return -EINVAL; -+ -+ part.name = name; -+ part.size = length; -+ part.offset = offset; -+ part.mask_flags = 0; -+ part.ecclayout = NULL; -+ -+ new = allocate_partition(master, &part, -1, offset); -+ if (IS_ERR(new)) -+ return PTR_ERR(new); -+ -+ start = offset; -+ end = offset + length; -+ -+ mutex_lock(&mtd_partitions_mutex); -+ 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); -+ -+ return ret; -+err_inv: -+ mutex_unlock(&mtd_partitions_mutex); -+ free_partition(new); -+ return -EINVAL; -+} -+EXPORT_SYMBOL_GPL(mtd_add_partition); -+ -+int mtd_del_partition(struct mtd_info *master, int partno) -+{ -+ struct mtd_part *slave, *next; -+ int ret = -EINVAL; -+ -+ mutex_lock(&mtd_partitions_mutex); -+ list_for_each_entry_safe(slave, next, &mtd_partitions, list) -+ if ((slave->master == master) && -+ (slave->mtd.index == partno)) { -+ ret = del_mtd_device(&slave->mtd); -+ if (ret < 0) -+ break; -+ -+ list_del(&slave->list); -+ free_partition(slave); -+ break; -+ } -+ mutex_unlock(&mtd_partitions_mutex); -+ -+ return ret; -+} -+EXPORT_SYMBOL_GPL(mtd_del_partition); -+ -+/* -+ * 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 -+ * the partition definitions. -+ * -+ * We don't register the master, or expect the caller to have done so, -+ * for reasons of data integrity. -+ */ -+ -+int add_mtd_partitions(struct mtd_info *master, -+ const struct mtd_partition *parts, -+ int nbparts) -+{ -+ struct mtd_part *slave; -+ uint64_t cur_offset = 0; -+ int i; -+ -+ printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); -+ -+ for (i = 0; i < nbparts; i++) { -+ slave = allocate_partition(master, parts + i, i, cur_offset); -+ if (IS_ERR(slave)) -+ return PTR_ERR(slave); -+ -+ mutex_lock(&mtd_partitions_mutex); -+ list_add(&slave->list, &mtd_partitions); -+ mutex_unlock(&mtd_partitions_mutex); -+ -+ add_mtd_device(&slave->mtd); -+ -+ cur_offset = slave->offset + slave->mtd.size; -+ } -+ -+ return 0; -+} -+EXPORT_SYMBOL(add_mtd_partitions); -+ -+static DEFINE_SPINLOCK(part_parser_lock); -+static LIST_HEAD(part_parsers); -+ -+static struct mtd_part_parser *get_partition_parser(const char *name) -+{ -+ struct mtd_part_parser *p, *ret = NULL; -+ -+ spin_lock(&part_parser_lock); -+ -+ list_for_each_entry(p, &part_parsers, list) -+ if (!strcmp(p->name, name) && try_module_get(p->owner)) { -+ ret = p; -+ break; -+ } -+ -+ spin_unlock(&part_parser_lock); -+ -+ return ret; -+} -+ -+int register_mtd_parser(struct mtd_part_parser *p) -+{ -+ spin_lock(&part_parser_lock); -+ list_add(&p->list, &part_parsers); -+ spin_unlock(&part_parser_lock); -+ -+ return 0; -+} -+EXPORT_SYMBOL_GPL(register_mtd_parser); -+ -+int deregister_mtd_parser(struct mtd_part_parser *p) -+{ -+ spin_lock(&part_parser_lock); -+ list_del(&p->list); -+ spin_unlock(&part_parser_lock); -+ return 0; -+} -+EXPORT_SYMBOL_GPL(deregister_mtd_parser); -+ -+int parse_mtd_partitions(struct mtd_info *master, const char **types, -+ struct mtd_partition **pparts, unsigned long origin) -+{ -+ struct mtd_part_parser *parser; -+ int ret = 0; -+ -+ for ( ; ret <= 0 && *types; types++) { -+ parser = get_partition_parser(*types); -+ if (!parser && !request_module("%s", *types)) -+ parser = get_partition_parser(*types); -+ if (!parser) { -+ printk(KERN_NOTICE "%s partition parsing not available\n", -+ *types); -+ continue; -+ } -+ ret = (*parser->parse_fn)(master, pparts, origin); -+ if (ret > 0) { -+ printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n", -+ ret, parser->name, master->name); -+ } -+ put_partition_parser(parser); -+ } -+ return ret; -+} -+EXPORT_SYMBOL_GPL(parse_mtd_partitions); -+ -+int mtd_is_partition(struct mtd_info *mtd) -+{ -+ struct mtd_part *part; -+ int ispart = 0; -+ -+ mutex_lock(&mtd_partitions_mutex); -+ list_for_each_entry(part, &mtd_partitions, list) -+ if (&part->mtd == mtd) { -+ ispart = 1; -+ break; -+ } -+ mutex_unlock(&mtd_partitions_mutex); -+ -+ return ispart; -+} -+EXPORT_SYMBOL_GPL(mtd_is_partition); |