diff options
Diffstat (limited to 'target/linux/generic/patches-3.6/401-partial_eraseblock_write.patch')
| -rw-r--r-- | target/linux/generic/patches-3.6/401-partial_eraseblock_write.patch | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/target/linux/generic/patches-3.6/401-partial_eraseblock_write.patch b/target/linux/generic/patches-3.6/401-partial_eraseblock_write.patch deleted file mode 100644 index f367e1e..0000000 --- a/target/linux/generic/patches-3.6/401-partial_eraseblock_write.patch +++ /dev/null @@ -1,146 +0,0 @@ ---- a/drivers/mtd/mtdpart.c -+++ b/drivers/mtd/mtdpart.c -@@ -35,6 +35,8 @@ - - #include "mtdcore.h" - -+#define MTD_ERASE_PARTIAL 0x8000 /* partition only covers parts of an erase block */ -+ - /* Our partition linked list */ - static LIST_HEAD(mtd_partitions); - static DEFINE_MUTEX(mtd_partitions_mutex); -@@ -230,13 +232,61 @@ static int part_erase(struct mtd_info *m - struct mtd_part *part = PART(mtd); - int ret; - -+ -+ instr->partial_start = false; -+ if (mtd->flags & MTD_ERASE_PARTIAL) { -+ size_t readlen = 0; -+ u64 mtd_ofs; -+ -+ instr->erase_buf = kmalloc(part->master->erasesize, GFP_ATOMIC); -+ if (!instr->erase_buf) -+ return -ENOMEM; -+ -+ mtd_ofs = part->offset + instr->addr; -+ instr->erase_buf_ofs = do_div(mtd_ofs, part->master->erasesize); -+ -+ if (instr->erase_buf_ofs > 0) { -+ instr->addr -= instr->erase_buf_ofs; -+ ret = mtd_read(part->master, -+ instr->addr + part->offset, -+ part->master->erasesize, -+ &readlen, instr->erase_buf); -+ -+ instr->len += instr->erase_buf_ofs; -+ instr->partial_start = true; -+ } else { -+ mtd_ofs = part->offset + part->mtd.size; -+ instr->erase_buf_ofs = part->master->erasesize - -+ do_div(mtd_ofs, part->master->erasesize); -+ -+ if (instr->erase_buf_ofs > 0) { -+ instr->len += instr->erase_buf_ofs; -+ ret = mtd_read(part->master, -+ part->offset + instr->addr + -+ instr->len - part->master->erasesize, -+ part->master->erasesize, &readlen, -+ instr->erase_buf); -+ } else { -+ ret = 0; -+ } -+ } -+ if (ret < 0) { -+ kfree(instr->erase_buf); -+ return ret; -+ } -+ -+ } -+ - 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; -+ if (mtd->flags & MTD_ERASE_PARTIAL) -+ kfree(instr->erase_buf); - } -+ - return ret; - } - -@@ -244,7 +294,25 @@ void mtd_erase_callback(struct erase_inf - { - if (instr->mtd->_erase == part_erase) { - struct mtd_part *part = PART(instr->mtd); -+ size_t wrlen = 0; - -+ if (instr->mtd->flags & MTD_ERASE_PARTIAL) { -+ if (instr->partial_start) { -+ part->master->_write(part->master, -+ instr->addr, instr->erase_buf_ofs, -+ &wrlen, instr->erase_buf); -+ instr->addr += instr->erase_buf_ofs; -+ } else { -+ instr->len -= instr->erase_buf_ofs; -+ part->master->_write(part->master, -+ instr->addr + instr->len, -+ instr->erase_buf_ofs, &wrlen, -+ instr->erase_buf + -+ part->master->erasesize - -+ instr->erase_buf_ofs); -+ } -+ kfree(instr->erase_buf); -+ } - if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) - instr->fail_addr -= part->offset; - instr->addr -= part->offset; -@@ -504,18 +572,24 @@ static struct mtd_part *allocate_partiti - 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); -+ slave->mtd.flags |= MTD_ERASE_PARTIAL; -+ if (((u32) slave->mtd.size) > master->erasesize) -+ slave->mtd.flags &= ~MTD_WRITEABLE; -+ else -+ slave->mtd.erasesize = slave->mtd.size; - } - 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); -+ mtd_mod_by_eb(slave->offset + slave->mtd.size, &slave->mtd)) { -+ slave->mtd.flags |= MTD_ERASE_PARTIAL; -+ -+ if ((u32) slave->mtd.size > master->erasesize) -+ slave->mtd.flags &= ~MTD_WRITEABLE; -+ else -+ slave->mtd.erasesize = slave->mtd.size; - } -+ if ((slave->mtd.flags & (MTD_ERASE_PARTIAL|MTD_WRITEABLE)) == MTD_ERASE_PARTIAL) -+ printk(KERN_WARNING"mtd: partition \"%s\" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only\n", -+ part->name); - - slave->mtd.ecclayout = master->ecclayout; - slave->mtd.ecc_strength = master->ecc_strength; ---- a/include/linux/mtd/mtd.h -+++ b/include/linux/mtd/mtd.h -@@ -58,6 +58,10 @@ struct erase_info { - u_long priv; - u_char state; - struct erase_info *next; -+ -+ u8 *erase_buf; -+ u32 erase_buf_ofs; -+ bool partial_start; - }; - - struct mtd_erase_region_info { |