summaryrefslogtreecommitdiff
path: root/target/linux/generic/patches-3.6/401-partial_eraseblock_write.patch
diff options
context:
space:
mode:
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.patch146
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 {